Field Dependent Electron and Quadrupole Spin Relaxation: A Unified Treatment

Kruk, Danuta

doi:10.12693/aphyspola.111.215

Cited by 3 publications

(2 citation statements)

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“…There is a mathematical analogy between the Hamiltonian form of the quadrupole and ZFS interactions. By the replacements 3 [5][6][7][8][9][10] We exploit this analogy in subsequent calculations. The relative orientation of the (P) and (L) frames changes stochastically in time due to molecular motion, typically rotation of the molecule carrying the quadrupole nucleus.…”

Section: Intermediate Motional Rangementioning

confidence: 99%

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Nuclear quadrupole resonance lineshape analysis for different motional models: Stochastic Liouville approach

Kruk

Earle

Mielczarek

et al. 2011

The Journal of Chemical Physics

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A general theory of lineshapes in nuclear quadrupole resonance (NQR), based on the stochastic Liouville equation, is presented. The description is valid for arbitrary motional conditions (particularly beyond the valid range of perturbation approaches) and interaction strengths. It can be applied to the computation of NQR spectra for any spin quantum number and for any applied magnetic field. The treatment presented here is an adaptation of the "Swedish slow motion theory," [T. Nilsson and J. Kowalewski, J. Magn. Reson. 146, 345 (2000)] originally formulated for paramagnetic systems, to NQR spectral analysis. The description is formulated for simple (Brownian) diffusion, free diffusion, and jump diffusion models. The two latter models account for molecular cooperativity effects in dense systems (such as liquids of high viscosity or molecular glasses). The sensitivity of NQR slow motion spectra to the mechanism of the motional processes modulating the nuclear quadrupole interaction is discussed.

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Section: Intermediate Motional Rangementioning

confidence: 99%

“…Due to mathematical similarities in the Hamiltonian formalisms of ZFS and quadrupole interactions, as noted above, ESR spectra and NQR spectra for species with S ≥ 1 can be described in a similar manner. [5][6][7][8][9][10] We exploit this analogy where appropriate in this work.…”

Section: Introductionmentioning

confidence: 99%