Exact computation of the zeeman effect on nuclear quadrupole resonance profiles for powders determination of the asymmetry parameter

The effect of Berry’s phase on the nuclear quadrupole resonance (NQR) spectra of rotating powder samples is studied experimentally, and its application for the determination of the electric field gradient asymmetry η is demonstrated. The NQR frequency splittings, which are observed for the spin 3/2 nucleus of 35Cl in powder samples of p-dichlorobenzene (C6H4Cl2) and cyanuric chloride (C3N3Cl3), are interpreted as a manifestation of Berry’s phase, associated with the adiabatically changing Hamiltonian due to sample rotation. The accumulation of Berry’s phase during the rotation process is responsible for the observed dependence of the NQR line shape on the rotation frequency and the asymmetry parameter. The proposed method for the determination of η involves the analysis of the NQR powder patterns of the rotating samples.

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The powder Zeeman study of CH3NH3Hg2Cl5 by the nuclear quadrupole resonance

Canadian Journal of Physics ◽

10.1139/p99-055 ◽

2000 ◽

Vol 78 (1) ◽

pp. 1-8

Author(s):

Neslihan Saygin

Keyword(s):

Electric Field ◽

Electric Field Gradient ◽

Temperature Dependence ◽

Nuclear Quadrupole Resonance ◽

Field Gradient ◽

Asymmetry Parameter ◽

Zeeman Effect ◽

Crystalline Powder ◽

Quadrupole Resonance ◽

Nuclear Quadrupole

The temperature dependence of the Cl nuclear quadrupole resonance (NQR) frequency in CH3NH3Hg2Cl5 was investigated for temperatures between 77 and 340 K where three frequencies were found. The Zeeman effect on the NQR of 35Cl in a crystalline powder of CH3NH3Hg2Cl5 was studied. The asymmetry parameter (η) of the electric field gradient for the second frequency was obtained. PACS No.: 33.25

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Powder Zeeman Study of the Nuclear Quadrupole Resonance Lower Transition Spectrum for I = 5/2; Application to Orthoperiodic Acid

Zeitschrift für Naturforschung A ◽

10.1515/zna-1985-0202 ◽

1985 ◽

Vol 40 (2) ◽

pp. 112-115

Author(s):

S. Ramaprabhu ◽

K. V. S. Rama Rao

Keyword(s):

Nuclear Quadrupole Resonance ◽

Asymmetry Parameter ◽

Zeeman Effect ◽

Transition Line ◽

Present Value ◽

Crystalline Powder ◽

Quadrupole Resonance ◽

Zeeman Frequency ◽

Lower Transition ◽

Nuclear Quadrupole

The Zeeman effect of the nuclear quadrupole resonance (NQR) lower transition (± 3/2 ↔ 1/2) spectrum for I=5/2 in crystalline powder has been studied and the frequency splittings of the ±3/2 ↔ ± 1/2 transition line have been plotted as a function of the asymmetry parameter η and the external magnetic field H. The experimental Zeeman frequency splittings of the 127I lower transition line in crystalline powder of H5IO6 have been compared with the theoretical values in order to evaluate η. The present value of η agrees with the earlier values reported from the two transition frequencies and also from a single crystal Zeeman study on the ± 3/2 ↔ ± 1/2 transition line.

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