Multiple-pulse investigations in pure NQR spectroscopy: influence of spin-locking and phase alternated pulse sequence (PAPS) on polycrystalline samples containing 35Cl((I=) nuclei

A theory of the spin-lattice and spin-spin relaxation processes in quadrupole spin systems with I > 1/2 in the situation of the multiple-pulse NQR spin locking is proposed for the pulse sequence MW-4. The theory is based on the assumption that for t ≳ T2 the change of the spin system is a quasi-equilibrium process. Rate equations for inverse generalized temperatures are obtained and the kinetic coefficients calculated for the case o f exponential correlation functions. The above assumption was confirmed for some substances containing the 35Cl and 123Sb, and the time constant T1e characterizing the spin echo signal decay was investigated and compared with the time constant T1q, in the case of continuous spin locking.

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Analysis of the performance of a phase alternated multiple pulse sequence in spin I = 7/2 zero-field NQR spectroscopy

Molecular Physics ◽

10.1080/00268979709482173 ◽

1997 ◽

Vol 92 (6) ◽

pp. 1035-1038 ◽

Cited By ~ 2

Author(s):

A. RAMAMOORTHY

Keyword(s):

Pulse Sequence ◽

Zero Field ◽

Multiple Pulse

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Theoretical investigations of quantum correlations in NMR multiple-pulse spin-locking experiments

Quantum Information Processing ◽

10.1007/s11128-018-1841-x ◽

2018 ◽

Vol 17 (4) ◽

Author(s):

S. A. Gerasev ◽

A. V. Fedorova ◽

E. B. Fel’dman ◽

E. I. Kuznetsova

Keyword(s):

Quantum Correlations ◽

Multiple Pulse ◽

Theoretical Investigations ◽

Spin Locking

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Heteronuclear polarization transfer in static oriented systems using a windowless multiple-pulse sequence

Chemical Physics Letters ◽

10.1016/j.cplett.2007.03.104 ◽

2007 ◽

Vol 439 (4-6) ◽

pp. 407-411 ◽

Cited By ~ 6

Author(s):

S. Jayanthi ◽

P.K. Madhu ◽

Narayanan D. Kurur ◽

K.V. Ramanathan

Keyword(s):

Pulse Sequence ◽

Polarization Transfer ◽

Multiple Pulse

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Multiple-Pulse Spin Locking in Dipolar Solids.

Physical Review Letters ◽

10.1103/physrevlett.39.850 ◽

1977 ◽

Vol 39 (13) ◽

pp. 850-850 ◽

Cited By ~ 1

Author(s):

W. -K. Rhim ◽

D. P. Burum ◽

D. D. Elleman

Keyword(s):

Multiple Pulse ◽

Spin Locking

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Multiple-pulse spin locking in nanofluids

RSC Advances ◽

10.1039/c5ra06439b ◽

2015 ◽

Vol 5 (55) ◽

pp. 44247-44257 ◽

Cited By ~ 6

Author(s):

Gregory B. Furman ◽

Shaul D. Goren ◽

Victor M. Meerovich ◽

Vladimir L. Sokolovsky

Keyword(s):

Relaxation Time ◽

Water Molecules ◽

Nuclear Spins ◽

Multiple Pulse ◽

Spin Locking ◽

Analytical Expressions

The multiple pulse spin locking dynamics of the nuclear spins in nanofluids was studied. Oriented (a) and disoriented (b) nanocavities containing water molecules (c) were considered. Analytical expressions for the magnetization and the relaxation time were obtained.

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On dipole-Zeeman cross relaxation in multiple-pulse spin locking

physica status solidi (b) ◽

10.1002/pssb.2221070263 ◽

1981 ◽

Vol 107 (2) ◽

pp. K159-K162

Author(s):

M. M. Kucherov ◽

A. V. Ponomarenko ◽

V. E. Zobov

Keyword(s):

Cross Relaxation ◽

Multiple Pulse ◽

Spin Locking

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Nitrogen-14 NQR Multiple-Pulse Spin-locking in the Axial Electric Field Gradient

Zeitschrift für Naturforschung A ◽

10.1515/zna-1994-1-216 ◽

1994 ◽

Vol 49 (1-2) ◽

pp. 97-102 ◽

Cited By ~ 4

Author(s):

G . B. Furman

Keyword(s):

Electric Field ◽

Floquet Theory ◽

Electric Quadrupole ◽

Dipole Interaction ◽

Quasi Equilibrium ◽

Multiple Pulse ◽

Crystal Electric Field ◽

Equilibrium Magnetization ◽

Spin Locking ◽

Pulse Radiofrequency

Abstract The behavior of a nuclear spin-1 system with the Hamiltonian including: a) the interaction of the electric quadrupole moment of nuclei with the axial gradient of the crystal electric field; b) a homonuclear and heteronuclear dipole-dipole coupling; and c) the interaction with a multiple pulse radiofrequency field of arbitrary orientation was considered. The effective Hamiltonian is constructed by using the Floquet theory. The secular parts of the homonuclear and heteronuclear dipole-dipole interaction was found and the quasi-equilibrium magnetization was calculated.

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