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Quadrupole relaxation

Nuclear electric quadrupole relaxation - Gerothanassis

209Bi quadrupole relaxation enhancement in solids as a

  1. Nuclear Quadrupole Resonance (NQR) experiments were performed for deuterated and non-deuterated triphenylbismuth (BiPh3) to inquire into 209Bi relaxation mechanisms. The studies are motivated by the idea of exploiting Quadrupole Relaxation Enhancement (QRE) as a novel contrast mechanism for Magnetic Resonan
  2. The spin rotation (SR) relaxation mechanism arises from an interaction between the nuclear spin and a coupling to the overall molecular rotational angular momentum. Nuclei with spin I ≥ 1 will have not only a nuclear dipole but a quadrupole. The nuclear quadrupole has an interaction with the electric field gradient at the nucleus which is again orientation dependent as with the other mechanisms described above, leading to the so-called quadrupolar relaxation mechanism
  3. If the quadrupole moment is small, as it is for deuterium, or the efg is small the relaxation effects are not too severe. In NMR this fast relaxation has the effect of decoupling the quadrupole nucleus so scalar (spin-spin) coupling is rarely seen. The NMR lines for quadrupolar nuclei are also often very broad also due to the fast relaxation
  4. The often-accepted view that quadrupole relaxation of 10 B is faster than that of 11 B is shown to be in error since the effect of the larger 10 B quadrupole moment is more than compensated by its larger nuclear spin. The significance of this for the appearance of the spectra of spin - nuclei coupled to boron is discussed

Relaxation durch Kern-Quadrupol-Feldgradient-Wechselwirkung (QF) Für den sehr häufigen Fall, dass Kerne ( Nuklide wie z. B. 2 H, 7 Li, 14 N, 17 O, 23 Na, 35 Cl und 133 Cs) einen Kernspin I ≥ 1 {\displaystyle I\geq 1} haben, kommt ein besonderer, nämlich ein nicht-magnetischer Relaxationsmechanismus ins Spiel in studies of quadrupole nuclei for two reasons: first, some multi-quantum transitions are not influenced by the quadrupole interaction, second, the relaxation behavior of the transitions yields additional information about the system under study. The majority of studies are devoted to the spin-l nucle The relaxation of quadrupole orientation (alignment) in an optically pumped alkali vapour is theoretically studied by taking into account the relaxation processes by alkali-buffer gas, alkali-alkali with spin exchange and alkali-cell wall (diffusion process) collisions. The relaxation transients of the quadrupole orientation are obtained by. Existence of the quadrupole moment of muonium leads to essential influence of crystal electric fields on the precession and relaxation of its spin in a medium. As is well known, the basic quantum characteristic of muonium is its magnetic moment. Only the exist- ence of the magnetic moment has led to the appear- ance of the mesonic method for the study of proper- ties of a substance and its intensive development in the last time. This method is the original analogy of NMR and ESR (see review.

Nuclear Quadrupole Resonance (NQR) experiments were performed for deuterated and non-deuterated triphenylbismuth (BiPh 3) to inquire into 209Bi relaxation mechanisms. The studies are motivated by the idea of exploiting Quadrupole Relaxation Enhancement (QRE) as a novel contrast mechanism for Magnetic Resonance Imaging. From this perspective relaxation features of nuclei possessing quadrupole Nuclear quadrupole resonance is an effective spectroscopic method to investigate the charge density distribution in solids. The range of compounds which may be investigated is wide, reaching from.

A theory of the broadening of multiplet components in magnetic resonance spectra of coupled nuclei due to electric quadrupole spin-lattice relaxation is presented. It is shown that the broadening of the components of the 1:1:1 triplet for nuclei of spin 1/2 coupled to a nucleus of spin 1, is 3/2 as great for the outer lines as for the central one, provided that the rate of quadrupole relaxation is not too large. This is in agreement with experimental observations o Kozlova, S.G., Kriger, Y.G. & Goncharuk, V.K. Quadrupole interactions and NMR relaxation in KSbF 6. J Struct Chem 28, 321-323 (1987). https://doi.org/10.1007/BF00751685. Download citation. Received: 06 February 1986. Revised: 15 April 1986. Issue Date: March 1987. DOI: https://doi.org/10.1007/BF0075168

Quadrupolar Coupling - Chemwiki

Fig. 1.Plot of the 14N quadrupole relaxation time of DMF and DMF-d7 in DM SO versus the mole fraction of DMSO. In the pure liquids, the relaxation time of 14N shows a 9% isotope effect between DMF. The presented theory describes the quadrupolar relaxation enhancement (QRE) for an arbitrary spin quantum number of the quadrupolar nuclei and includes the asymmetry of the quadrupolar coupling. Quadrupolar nuclei. Quadrupolar nuclei. I = 1 Deuterium Lithium-6 Nitrogen-14 I = 3/2 Lithium-7 Boron-11 Sodium-23 Chlorine-35 Potassium-39 Gallium-71 Rubidium-87 I = 5/2 Oxygen-17 Magnesium-25 Aluminium-27 I = 7/2 Scandium-45 Vanadium-51 Cobalt-59 I = 9/2 Niobium-93. Origin of the quadrupolar interaction

The data have been analyzed in terms of a theory of quadrupole relaxation enhancement, which has been extended here by including effects associated with quadrupole (14 N) spin relaxation caused by a fast fluctuating component of the electric field gradient tensor. Two motional processes have been identified: a slow one occurring on a timescale of about 8 × 10 −6 s which has turned out to be. Nuclear Quadrupole Resonance One central feature of the FETopen project CONQUER (Contrast by quadrupole enhanced relaxation) will explore new contrast mechanisms with the potential to push magnetic resonance imaging (MRI) beyond its limits towards a powerful modality for molecular imaging The solid curve is the simulation of PbTaSe 2 using the BCS model, assuming the superposition of magnetic and quadrupole relaxation mechanisms in addition to the distribution of the superconducting gap (see the text), which reproduces the experimental data well, in contrast to the simulation through only the magnetic relaxation mechanism (dashed curve) Potassium-39 nuclear magnetic resonance of potassium-ionophore complexes: Chemical shifts, relaxation times, and quadrupole coupling constants. Journal of Magnetic Resonance (1969) 1983, 51 (3) , 460-469. https://doi.org/10.1016/0022-2364(83)90298-6; R.Garth. Kidd. Quadrupolar and Other Types of Relaxation The 35Cl nuclear magnetic quadrupole relaxation enhancement on binding of chloride ions to human plasma albumin (HPA) has been studied under conditions of variable temperature, pH, ionic strength, protein, and sodium dodecyl sulfate concentration. A small number (less than 10) of chloride ions, most

Quadrupole relaxation enhancement and polarisation transfer in DMSO solution of [Bi(NO 3) 3 (H 2 O) 3]*18-crown-6 in solid state. Danuta Kruk *, Elzbieta Masiewicz, Evrim Umut, Martin Schlögl, Roland Fischer, Hermann Scharfetter * Korrespondierende/r Autor/in für diese Arbeit. Institut für Anorganische Chemie (6330) Institut für Medizintechnik (7170) Publikation: Beitrag in einer. a quadrupole relaxation and W2 = 2 Wx. lines is S(oo) S(f) _ 1 f S(oo) 2 1 + e -2 (W1+W2)t ) (6) We can see from (5) and (6) that the initial slopes of the recovery curve for the satellite lines are steeper than that for the center line, see Figure 2. Then, we consider the recovery law in the case of the dominant magnetic dipole-dipole relaxation. The transition probability is zero except for. Motivated by the possibility of exploiting species containing high spin quantum number nuclei (referred to as quadrupole nuclei) as novel contrast agents for Magnetic Resonance Imaging, based on Quadrupole Relaxation Enhancement (QRE) effects, 1H spin-lattice relaxation has been investigated for tris(2-methoxyphenyl)bismuthane and tris(2,6-dimethoxyphenyl)bismuthane in powder The concentration dependences of the 2 H spin-lattice relaxation rate in aqueous solutions of certain mineral acids were studied. The relative 1 H and 2 H relaxation rates in solutions of equal compositions and concentrations were compared. Bringing the proton and deuteron resonance data into consistency was shown to require the introduction of corrections for changes in the quadrupole.

Quadrupole relaxation enhancement—application to molecular

Relaxation processes (vide infra) eventually return the spin system to thermal equilibrium, which occurs in the absence of any further perturbing RF pulses. The energy required to induce flipping and obtain an NMR signal is just the energy difference between the two nuclear orientations and is shown in Figure 1.3 to depend on the strength of the magnetic field B. o. in which the nucleus is. Motivated by the possibility of exploiting species containing high spin quantum number nuclei (referred to as quadrupole nuclei) as novel contrast agents for Magnetic Resonance Imaging, based on Quadrupole Relaxation Enhancement (QRE) effects, 1H spin-lattice relaxation has been investigated for tris(2-meth Quadrupole relaxation in Mössbauer spectroscopy. View / Open Files. PR-PHD-06873.pdf (PDF, 55Mb) Authors. Dubery, John Martin. Date 1969-12-05. Awarding Institution. University of Cambridge. Author Affiliation. Faculty of Physics and Chemistry. Organic and Inorganic Chemistry. Qualification. Doctor of Philosophy (PhD) Type. Thesis . Metadata Show full item record. Citation. Dubery, J. M.. Equipment for detecting and measuring nuclear quadrupole relaxation spectra and duration of frequencies from 20 to 150 Mc is described. The results of measurements on Cu/sup 63/ in the Cu/sub 2/O powder (transition plus or minus 1/2 yields plus or minus 3/2) and Sb/s up 121/ in SbCl/sub 3/ powder (transition plus or minus 1/2 yields plus or minus 3/2 and plus or minus 3/2 yields plurre.

Quadrupolar Coupling - Chemistry LibreText

Макаров: квадрупольная релаксаци Biophysics: Quadrupole Relaxation. Nature New Biology volume 236, page 226(1972)Cite this article. 21 Accesses. Metrics details. Download PDF. Rights and permissions. Reprints and Permissions.

A. Quadrupolar Relaxation.... 119 B. Nuclear Quadrupole Resonance 121 0 SPECTRAL PARAMETERS 123 A. Chemical Shifts in Diamagnetic Compounds 123 B. O Exchange Reactions ., 126 C. Indirect Interactions .' 126 D. Chemical Shifts in Paramagnetic Compounds 126 CONCLUSIONS 128 References 128 I. INTRODUCTION In the past 15 years workers in the field of NMR have witnessed theoretical and. Moreover, quadrupole relaxation enhancement (QRE) effects originating from slowly fluctuating (1)H-(14)N dipolar interactions have been observed. From the positions of the relaxation maxima, the quadrupole coupling parameters for the (14)N nuclei in [C3H5N2]6[Bi4Br18] have been determined. The (1)H-(14)N relaxation contribution associated with the slow dynamics has been described in terms of a. Relaxation by Quadrupole Coupling. Authors; Authors and affiliations; N. Bloembergen; Chapter. 84 Downloads; Abstract. If a nucleus has a spin I > ½, the possibility of a spherically asymmetrical charge distribution over the nucleus exists. The value of the electric quadrupole momente e Q is defined in Casimir's basic treatise (C2) on the quantummechanics of the quadrupole moment as. Electric quadrupole relaxation in liquids . 346: REFERENCES . 353: MAGNETIC RELAXATION AND DYNAMIC POLARIZATION . 389: RELAXATION BY THERMAL VIBRATIONS IN A CRYSTAL . 401: Magnetic and quadrupole relaxation by spinphonon coupling . 409: Ultrasonic experiments . 417: REFERENCES . 423: OF WIDTH AND RELAXATION PROPERTIES ZEEMAN . 451 REFERENCES . 158: MAGNETIC INTERACTIONS . 170: The effect of. ABSTRACT: The 35C1 nuclear magnetic quadrupole relaxation enhancement on binding of chloride ions to human plasma albumin (HPA) has been studied under conditions of variable temperature, pH, ionic strength, protein, and sodium dodecyl sulfate concentration. A small number (510) of chloride ions, most of which are bound to the primary detergent binding sites, contribute a major portion of the.

Quadrupole relaxation of chloride ion, and of perchlorate

  1. Quadrupole relaxation of nuclear spins of diamagnetic atoms in liquids is treated theoretic­ ally. The calchlations are made on the assumption that the thermal motion of the liquid par­ ticles is a free translational diffusion. This assumption is valid for metal and salt melts and for weakly solvated ions in electrolyte solutions. It is found that T21 ' ry/T (1'/ is the viscos­ ity of the.
  2. (HPA) has been studied under conditions of variable temperature, pH, ionic strength, protein, and sodium dodecyl sulfate concentration. A small number (less than 10) of chloride ions, most
  3. Tjon-Blume Jahn-Teller Quadrupole Relaxation (Powder) - model considering quadrupole interaction in the presence of a fluctuating electric field gradient, expected e.g. in the case of the dynamic Jahn-Teller effect. Described in PR 165 (1968) 456. Electron Hopping Relaxation (Paramagnetic, Powder) - model implemented for 57 Fe in paramagnetic powder where electron hopping occurs either between.
  4. 14N quadrupole relaxation of DMF and DMF-d7 in DMSO at infinite dilution. Mao, Xi-An; Holz, Manfred. Export; Exportieren als BibTeX (UTF-8) BibTeX (ASCII) EndNote/Refer (.enw) RIS CSL-JSON ISI Zugehörige Institution(en) am KIT: Institut für Physikalische Chemie und Elektrochemie (Inst. f. Physikal. Chemie u. Elektrochem.).

We measure the interspecies interaction strength between Li 7 and Rb 87 atoms through cross-dimensional relaxation of two-element gas mixtures trapped in a spherical-quadrupole magnetic trap. We record the relaxation of an initial momentum-space anisotropy in a lithium gas when cotrapped with rubidium atoms, with both species in the | F = 1, m F = − 1 〉 hyperfine state The Cu 63 and Cl 35 pure quadrupole relaxation times have been measured by rf pulse techniques in cuprous oxide, paradichlorobenzene, 2,2-dichloropropane, t-butyl chloride, and methylene chloride at temperatures from 77°K to room temperature. The Cu 63 T 1 data agree with the ionic lattice model. The Cl >35</SUP> T<SUB>1</SUB> data for paradichlorobenzene agree with a torsional molecular. Here we report a complete set of experimental nuclear quadrupole relaxation data that are obtained for <sup>17</sup>O, a half-integer quadrupolar nucleus, over the entire range of molecular motion within the limit of the Redfield theory. A general approach utilizing the quadrupole relaxation properties in the slow motion limit will be particularly beneficial for studies of quadrupolar nuclei.

Model - free approach to quadrupole spin relaxation in

  1. quadrupole spin-lattice relaxation tensor To cite this article: D G Hughes 1973 J. Phys. C: Solid State Phys. 6 3797 View the article online for updates and enhancements. Related content Orientation dependence of the nuclear quadrupole relaxation in crystals R E Snyder and D G Hughes-Orientation dependence of the 23 Na nuclear quadrupole spin-lattice relaxation in sodium nitrate D G Hughes and.
  2. NMR CHARACTERIZATION OF HYDROGEN BONDS IN A PROTEIN 55 FIG. 1. 15N-{2H} multiplet simulations at QCC values of 150, 200, and 250 kHz, and at t c values of 0.1, 5, and 10 ns, calculated using Redfield relaxation theory (29) for isotropic rotational diffusion and 1J 2H-N †14.4 Hz. The 15N-{2H} coherence evolves under the scalar coupling (H J), quadrupole (HQ), and dipolar (HD.
  3. ed by regarding the molecule as a rigid ellipsoidal body which shows anisotropic rotational Brownian motions. Dependence of relaxation times upon the angle between the direction of the maximum field gradient and that of the molecular axis is considered also; the complex angular dependence of the relaxation times is.
  4. us-nuclear magnetic resonance (NMR) studies indicate that various digests of human hemoglobin with carboxypeptidase A and B, or a combination of the two, may be used for.
  5. has been studied under conditions of variable protein and anion concentration and also in the presence of simple inorganic, amphiphilic, and complex anions which compete with the halide ions for the protein anion binding sites

Relaxation (NMR) - Wikipedi

This thesis is not available on this repository until the author agrees to make it public. If you are the author of this thesis and would like to make your work openly available, please contact us: thesis@repository.cam.ac.uk Entdecken Sie Quadrupole von Aroma Relaxation Music bei Amazon Music. Werbefrei streamen oder als CD und MP3 kaufen bei Amazon.de quadrupole relaxation process can also manifest itself in the NMR spectra of spin-1/2 nuclei when they are J-coupled to quadrupolar nuclei.30 34 However, previous studies either dealt with nuclear quadrupole relaxation within narrowly defined ranges of molecular motion or probed it indirectly via detection of spin-1/2 nuclei. To the best of our knowledge, there has not been a single case in.

Quadrupolar coupling - NMR Wik

* 이 자료는 대한화학회가 기존의 홈페이지에 있는 술어를 2008년에 발간한 화학술어집(제5개정판)을 검토하여 축약하였으며 1998년에 제정한 화합물 명명법 기본 원칙에 따라 수정한 것입니다. 2014년 9월 현재판입니다 Diffusion in Intermetallic Compounds Studied Using Nuclear Quadrupole Relaxation On the effect of lattice vibration models on nuclear quadrupole relaxation in alkali halide crystals Teilen. Literatur-verwaltung. Direktlink. Zur Merkliste. Lösche von Merkliste. Per Email teilen. Auf Twitter teilen. Auf Facebook teilen. Per Whatsapp teilen quadrupole spin-lattice relaxation in sodium nitrate To cite this article: D G Hughes and K Reed 1971 J. Phys. C: Solid State Phys. 4 2945 View the article online for updates and enhancements. Related content Experimental study of the orientation dependence of the 23 Na spin-lattice relaxation in sodium nitrate P A Spencer and D G Hughes-Orientation dependence of the nuclear quadrupole. Nuclear Quadrupole Resonance (NQR) spectroscopy has been known for 70 years. It is suitable for the study of measured (poly)crystalline chemical compounds containing quadrupole nuclei (nuclei with spin I ≥ 1) where the characteristic NQR frequencies represent the fingerprints of these compounds. In several cases, 14N NQR can distinguish between the polymorphic crystalline phases of active.

Quadrupole relaxation of boron-11 and boron-10 nuclei

  1. Nuclear quadrupole relaxation Intermetallic compounds Ga 7Pd 3 and Ga 7Pt 3 have the cubic Ge 7Ir 3 structure, with 40 atoms per unit cell [1, 2]. There is one transition-metal site and two inequivalent, noncubic Ga-sites designated Ga(3) and Ga(4) according to the number of sites per formula unit. In a previous study of nuclear quadrupole interactions in Ga 7Pd 3 using the method of perturbed.
  2. Effect of nuclear quadrupole interaction on the relaxation in amorphous solids. Journal of Low Temperature Physics, 140 (5-6), 355-376. Item is Freigegebe
  3. Spannende, informative Bücher sind ein toller Zeitvertreib. Bei bücher.de kaufen Sie dieses Buch portofrei: Static Quadrupole Effects in Disordered Cubic Solids. / Nuclear Magnetic

Read about Quadrupole from Aroma Relaxation Music's Aroma Relaxation Music vol.11 and see the artwork, lyrics and similar artists revealing several relaxation effects originating from a quantum-mechanical interplay between different types of spin interactions. One of them is Quadrupole Relaxation Enhancement (QRE). A very superficial description of the QRE effect is as follows. T is effect involves at least one nucleus of spin-quantum number I=1/2 (typically 1H) and one nucleus of spin quantum number S‡1; let us. The quadrupole mechanism of hole spin relaxation. Yuri A. Serebrennikov Qubit Technology Center 2152 Merokee Dr., Merrick, NY 11566 ys455@columbia.edu For spin-3/2 holes the anisotropic part of the instantaneous Luttinger Hamiltonian can be represented as an effective quadrupole coupling. We investigate the hole spin relaxation process induced by nonadiabatic fluctuations of this interaction. The 14N nuclear quadrupole resonances (NQR) in sulfuric diamide (sulfamide), H2NSO2NH2, and methanesulfonamide, CH3SO2NH2, were studied by the pulse method. The resonance frequency and the spin-lat.. Zeeman-quadrupole cross relaxation between two nuclear spin species Harold T. Stokesa) and David C. Ailion Department of Physics, University of Utah, Salt Lake City, Utah 84112 (Received 6 November 1978) We derive an expression for the rate Tis' of the cross relaxation between the Zeeman splitting of one nuclear spin species.

Title: Nuclear Spin 3=2 Electric Quadrupole Relaxation as a Quantum Computation. Authors: A. M. Souza, A. Gavini-Viana, I. S. Oliveira, R. S. Sarthour, R. Auccaise, J. Teles, E. R. deAzevedo, T. J. Bonagamba (Submitted on 12 May 2011) Abstract: In this work we applied a quantum circuit treatment to describe the nuclear spin relax- ation. From the Redfield theory, we were able to describe the. For slowly tumbling entities or quasi-rigid lattices, we derive very simple analytical expressions of the quadrupole relaxation enhancement (QRE) of the longitudinal relaxation rate R1 of nuclear spins I due to their intramolecular magnetic dipolar coupling with quadrupole nuclei of arbitrary spins S 1. These expressions are obtained by using the adiabatic approximation for evaluating the time. Quadrupole-Nuclear Relaxation Induced by Dynamic Disorders. Abstract; References (38) Full text: PDF (1302 kB) Keizo Horiuchi 1 + Affiliations. 1 Division of General Education, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-01. Received May 12, 1994 . The 35 Cl NQR spin-lattice. The observed relaxation profile shows a marked enhancement for equal proton Larmor and quadrupole spin frequencies (i.e. $\omega_I$= $\omega_Q$), This phenomenon is referred to as the quadrupole dip, and has been observed for instance in $^{14}N-^1H$ amid groups of immobilized proteins. In this work an analysis of the observed relaxation enhancement is presented when the dipole-dipole coupling.

INERTIAL QUADRUPOLE SPIN-LATTICE RELAXATION AND ACOUSTIC MAGNETIC RESONANCE U. Kh. KOPVILLEM and V. R. NAGIBAROV Kazan' Physico-technical Institute, USSR Academy of Sciences Submitted March 28, 1969 Zh. Eksp. Teor. Fiz. 57, 2021-2030 (December, 1969) Resonance absorption of energy of external sound generators caused by interaction between the inertial quadrupole moments of the impurities and. Quadrupole relaxation enhancement and polarisation transfer in DMSO solution of [Bi(NO 3 ) 3 (H 2 O) 3 ]*18-crown-6 in solid state. Kruk D; Masiewicz E; Umut E; et al. See more; Molecular Physics (2019) 117(7-8) 944-951. DOI: 10.1080/00268976.2018.1552798. 1 Citations. Citations of this article. 10 Readers. Mendeley users who have this article in their library. Add to library. View PDF. This. Abstract. Nonexponentiality of the nuclear quadrupole relaxation of spin- 3 2 was carefully examined for the nonextreme narrowing case. Two decay constants for 7Li longitudinal relaxation in 11 M aqueous solution (D2O) of LiCI were determined A pulsed nuclear quadrupole resonance (NQR) spectrometer was constructed and with it the temperature dependences of relaxation of N 14 nucleus in ethylenediamine have been studied between 63 K and 274 K. As the temperature rises, two measured relaxation times, T 1s amd T 1 l which characterize the nuclear relaxation of the nitrogen NQR lines, approach gradually each other above 200 K

Gary S COLLINS | Professor of Physics | Ph

Relaxation of quadrupole orientation in an optically

  1. For slowly tumbling entities or quasi-rigid lattices, we derive very simple analytical expressions of the quadrupole relaxation enhancement (QRE) of the longitudinal relaxation rate R1 of nuclear spins I due to their intramolecular magnetic dipolar coupling with quadrupole nuclei of arbitrary spins S ≥ 1. These expressions are obtained by using the adiabatic approximation for evaluating the.
  2. the magnetic and quadrupole relaxation mechanisms are de-scribed in the text. optimize the curve fit. One such fit is shown in Fig. 3, where the theoretical curves are described below. For the central transition, the spin-lattice relaxation is a multiexponential expression. ' ' Three methods are used in our relaxation analysis for different temperatures. Standard inversion recovery using a.
  3. http://www.scopus.com/inward/record.url?scp=34250509194&partnerID=8YFLogx
  4. A simple continuum model for quadrupole relaxation rates of atoms and large ions in polar solvents is obtained by generalizing the recent Hynes-Wolynes model. Whereas the original model considers fluctuations in the electric field gradient at the quadrupolar nucleus to arise solely from rotational motions of solvent dipoles, the present model also allows for fluctuations due to translational.
  5. quadrupole relaxation的中文翻譯,quadrupole relaxation是什麼意思,怎麽用漢語翻譯quadrupole relaxation,quadrupole relaxation的中文意思,quadrupole relaxation的中文,quadrupole relaxation in Chinese,quadrupole relaxation怎麼讀,发音,例句,用法和解釋由查查在綫詞典提供,版權所有違者必究
  6. Zeeman-quadrupole cross relaxation in 1,2-difluorotetrachloroethanea) Harold T, Stokes,b) Thomas A. Case, and David C, Ailion Department of Physics, University of Utah, Salt Lake City, Utah 84112 C. H. Wang Department of Chemistry, University of Utah, Salt Lake City, Utah 84112 (Received 6 November 1978) We report measurements of 19p NMR relaxation times TI, Tip, TID' and T2 in the plastic.

Quadrupole moment and quadrupole relaxation of spin of

QUADRUPOLE ION TRAP /. F. J. Todd 1 Introduction 1 1.1. Principles of Operation 2 l.II. Utilization of the Quadrupole Ion Trap 6 (i) Mass-Selective Modes of Operation 6 (a) Mass-Selective Detection, 6 (b) Mass-Selective Storage, 13 (ii) Ion Loss Processes 16 (a) Unstable Trajectories, 17 (b) Interactions, 17 (c) Nonlinear Resonances, 21 (d) Self-Emptying, 22 1.111. The QUISTOR-Quadrupole. Donate to arXiv. Please join the Simons Foundation and our generous member organizations in supporting arXiv during our giving campaign September 23-27. 100% of your contribution will fund improvements and new initiatives to benefit arXiv's global scientific community Nuclear quadrupole relaxation in silver and sodium halide crystal Author YAMANISHI, T; KANASHIRO, T; ITABASHI, A; MICHIHIRO, Y; KISHIMOTO, Y; OHNO, T Tokushima univ., fac. eng., dep. physics, Tokushima 770, Japan Source. Journal of the Physical Society of Japan. = Nihon Butsuri Gakkai ōji hōkoku. 1994, Vol 63, Num 10, pp 3903-3904 ; ref : 6 ref . CODEN JUPSAU ISSN 0031-9015 Scientific domain. T 1 Relaxation. T 1 relaxation, also known as spin lattice or longitudinal relaxation is the time constant used to describe when ~63% of the magnetization has recovered to equilibrium. The T 1 of a given spin is dictated by field fluctuations (both magnetic and electric) that occur in the sample. Consequently, T 1 measurements can tell us important information regarding inter and intra.

Although all key aspects of nuclear quadrupole relaxation processes have been known for decades within the framework of the Redfield relaxation theory, direct experimental NMR relaxation data that cover a wide range of molecular motion in liquids for quadrupolar nuclei are generally lacking. Here we report a complete set of experimental nuclear quadrupole relaxation data that are obtained for. Quadrupole relaxation enhancement (QRE) has been suggested as the key mechanism for a novel class of field-selective, potentially responsive magnetic resonance Aspects of structural order in 209 Bi-containing particles for potential MRI contrast agents based on quadrupole enhanced relaxation For spin-3/2 holes the anisotropic part of the instantaneous Luttinger Hamiltonian can be represented as an effective quadrupole coupling. We investigate the hole spin relaxation process induced by nonadiabatic fluctuations of this interaction. The obtained analytical solution of the stochastic Liouville equation describes the polarization decay of spin-3/2 holes in all regimes of momentum. Berry dephasing due to diffusion in nuclear quadrupole resonance J.A. Jones 1 A. Pines * Materials Sciences Division, Lawrence Berkeley Laboratory, and Department of Chemistry, University of California, Berkeley, CA 94720, USA Received 20 July 1995; in final form 12 October 1995 Abstract Berry's phase can give rise to coherence dephasing in optically detected nuclear quadrupole resonance of. 2 H-13 C HETCOR MAS NMR for indirect detection of 2 H quadrupole patterns and spin-Lattice relaxation rates. Xiangyan Shi, Jeffery Yarger, Gregory P. Holland. CLAS-NS: Molecular Sciences, School of (SMS) Research output: Contribution to journal › Article › peer-review. 11 Scopus citations. Overview; Fingerprint; Abstract. Two-dimensional (2D) cross-polarization magic angle spinning (CP-MAS.

(PDF) 35Cl quadrupole relaxation study on Cs2[Au(I)Cl2][Au

The proton spin-lattice relaxation rate has been investigated as a function of pressure (p≤250 MPa), temperature (180 K≤T≤300 K), and oxygen‐17 enrichment (25.7 atom‐%, 50.7 atom‐%) in metastable water. Intramolecular proton-oxygen 17 dipolar interactions in light water in relation to deuterium electric quadrupole interactions in heavy water carry similar dynamic information. Influence of relaxation on the two-dimensional nutational nuclear-quadrupole-resonance spectra Influence of relaxation on the two-dimensional nutational nuclear-quadrupole-resonance spectra Sinyavskii, N.; Velikite, N. 2006-09-26 00:00:00 The influence of relaxation and frequency detuning on the nutational frequency and the damping factor of a nutational interference pattern is analyzed It is established that relaxation leads to decrease in nutational frequency, while detuning increases the nutation frequency. A relation is obtained between the relaxation times and the frequency detuning at which the influence of both factors cancels out. Conditions such that singularities of the nutational nuclear-quadrupole-resonance (NQR) spectrum (I=3/2) may be resolved are determined.

The effect of quadrupole relaxation on nuclear magnetic

We report on the 73 Ge-nuclear magnetic resonance (NMR)/nuclear quadrupole resonance (NQR) results for the ferromagnetic (FM) superconductor URhGe. The magnitude and direction of the internal field, H int, and the parameters of the electric field gradient at the Ge site were determined experimentally.By using powdered polycrystalline samples oriented by different methods, the field dependences. Quantum mechanical calculation of the nuclear quadrupole relaxation times for alkali halides by Kauko Mansikka, unknown edition IDIPOL, type of correction (monopole/dipole and quadrupole): For systems with a net dipole moment, the energy converges slowly with respect to the size of the super cell as well. The dipole corrections (and quadrupole corrections for charged systems) fall off like 1/L 3. Both corrections, dipole and quadrupole for charged systems, will be calculated and added to the total energy if IDIPOL is.

Spin echo - WikipediaA 14N nuclear quadrupole resonance study of phase

Quadrupole interactions and NMR relaxation in KSbF 6

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract. The jump frequency of Cd tracer atoms was measured as a function of temperature in seven rare-earth tri-indide intermetallic compounds having the L12, or Cu3Au, structure. The frequency, proportional to the diffusivity, was detected by relaxation of nuclear quadrupole interaction at Cd nuclei caused by. Nuclear quadrupole resonance. Researchers at the University of Oxford have developed a sensor, based on nuclear quadrupole resonance (NQR), capable of detecting biological material in proximity to the WPT field. The NQR system differentiates between humans or animals and can provide feedback to the WPT device to trigger a shut-down when necessary. The power can then be restored once the. Electric Quadrupole Relaxation of N^ in Ethylenediamine. 元データ 1976-02-15 社団法人日本物理学会 著者. NIKI Haruo Department of Physics and Earth Sciences, Faculty of Science, University of the Ryukyus KOJIMA Shoji Department of Hygienic Chemistry, Faculty of Pharmaceutical Sciences, Kumamoto University Niki Haruo Department Of Applied Physics Tokyo University Of Education.

Long-range Li + dynamics in the lithium argyrodite Li 7Theoretical curves corresponding to (24)–(26), on the onePPT - NMR Relaxation PowerPoint Presentation, freePPT - Biomedical Imaging 2 PowerPoint Presentation, freeDavid Stephenson
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