DOI: 10.1063/1.461421. α- and β-relaxation and the criteria for rotational diffusion

α- and β-relaxation and the criteria for rotational diffusion

10.1063/1.461421

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

A simple model for α- and β-rotational relaxation (detected through the behavior of the lth order spherical harmonics) in supercooled liquids predicts that the relaxation frequency of the latter is proportional to l(l+1) and that of the former (confirmed or at least suggested experimentally) is independent of l. This has been taken to mean that the β relaxation takes place by means of small angular jumps (diffusion) and the α relaxation by means of long angular jumps. However, because the amplitude of the α relaxation decreases rapidly with increasing l, despite the fact that the α-relaxation frequency is independent of l, the motion may be diffusional in accord with the observations of Spiess et al. This is discussed in terms of a simple model.

Bibliography

Kivelson, D. (1991). Î±- and Î²-relaxation and the criteria for rotational diffusion. The Journal of Chemical Physics, 95(1), 709â710.

Authors 1

Daniel Kivelson (first)

References 19 Referenced 14

{'key': '2024021011145278400_r1'}
{'key': '2024021011145278400_r2', 'first-page': '1041', 'volume': '18', 'year': '1964', 'journal-title': 'Sov. Phys. JETP'} / Sov. Phys. JETP (1964)
{'key': '2024021011145278400_r2a', 'first-page': '1509', 'volume': '45', 'year': '1963', 'journal-title': 'Sov. Phys. JETP'} / Sov. Phys. JETP (1963)
10.1063/1.456632 / J. Chem. Phys. (1989)
{'key': '2024021011145278400_r3a', 'first-page': '819', 'volume': '90', 'year': '1990', 'journal-title': 'J. Chem. Phys.'} / J. Chem. Phys. (1990)
10.1039/f29777300458 / J. Chem. Soc. Faraday Trans. II (1977)
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10.1063/1.459592 / J. Chem. Phys. (1990)
{'key': '2024021011145278400_r7'}
10.1111/j.1749-6632.1976.tb39701.x / Ann. N.Y. Acad. Sci. (1976)
10.1063/1.454116 / J. Chem. Phys. (1988)
{'key': '2024021011145278400_r10'}
10.1039/f29736900608 / J. Chem. Soc. Faraday II (1973)
10.1039/tf9706600080 / Trans. Faraday Soc. (1970)
10.1016/0167-7322(90)80063-P / J. Mol. Liq. (1990)
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Dates

Type	When
Created	23 years ago (July 26, 2002, 8:20 a.m.)
Deposited	1 year, 6 months ago (Feb. 10, 2024, 7:59 a.m.)
Indexed	1 year, 6 months ago (Feb. 10, 2024, 1:22 p.m.)
Issued	34 years, 1 month ago (July 1, 1991)
Published	34 years, 1 month ago (July 1, 1991)
Published Print	34 years, 1 month ago (July 1, 1991)

Funders 0

None

BibTeX

@article{Kivelson_1991, title={α- and β-relaxation and the criteria for rotational diffusion}, volume={95}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.461421}, DOI={10.1063/1.461421}, number={1}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Kivelson, Daniel}, year={1991}, month=jul, pages={709–710} }

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