Threshold phenomena in ultracold atom-molecule collisions

N. Balakrishnan; R. C. Forrey; A. Dalgarno

doi:10.1016/S0009-2614(97)01051-8

Threshold phenomena in ultracold atom-molecule collisions

N. Balakrishnan, R. C. Forrey, A. Dalgarno

Division of Science (Berks)

Research output: Contribution to journal › Article › peer-review

86 Scopus citations

Abstract

Vibrational relaxation cross sections for an atom-molecule collision are calculated by explicit numerical solution of the coupled equations of scattering theory and shown to follow an inverse velocity dependence at very low initial kinetic energies of the incident atom, in accordance with Wigner's threshold law. Rate constants for H+H₂(v, j=0)→H+H₂(v′<v, j=0) are calculated for all the vibrational levels of H₂ and found to vary by seven orders of magnitude between the deepest level v=0 and the vibrational level v=12.

Original language	English (US)
Pages (from-to)	1-4
Number of pages	4
Journal	Chemical Physics Letters
Volume	280
Issue number	1-2
DOIs	https://doi.org/10.1016/S0009-2614(97)01051-8
State	Published - Nov 28 1997

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Threshold phenomena in ultracold atom-molecule collisions",

abstract = "Vibrational relaxation cross sections for an atom-molecule collision are calculated by explicit numerical solution of the coupled equations of scattering theory and shown to follow an inverse velocity dependence at very low initial kinetic energies of the incident atom, in accordance with Wigner's threshold law. Rate constants for H+H2(v, j=0)→H+H2(v′2 and found to vary by seven orders of magnitude between the deepest level v=0 and the vibrational level v=12.",

author = "N. Balakrishnan and Forrey, {R. C.} and A. Dalgarno",

note = "Funding Information: These calculations were initiated in response to queries about vibrational quenching efficiencies at low temperatures from Dr. D. Kleppner and Dr. R.G. Hulet. We thank Dr. H. Friedrich for stimulating discussions and Dr. W.C. Stwalley for his instructive comments on an earlier draft. This work was supported by the US Department of Energy, Office of Basic Energy Sciences, Office of Energy Research (RCF), and by the National Science Foundation, Division of Atmospheric Science (NB). ",

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doi = "10.1016/S0009-2614(97)01051-8",

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T1 - Threshold phenomena in ultracold atom-molecule collisions

AU - Balakrishnan, N.

AU - Forrey, R. C.

AU - Dalgarno, A.

N1 - Funding Information: These calculations were initiated in response to queries about vibrational quenching efficiencies at low temperatures from Dr. D. Kleppner and Dr. R.G. Hulet. We thank Dr. H. Friedrich for stimulating discussions and Dr. W.C. Stwalley for his instructive comments on an earlier draft. This work was supported by the US Department of Energy, Office of Basic Energy Sciences, Office of Energy Research (RCF), and by the National Science Foundation, Division of Atmospheric Science (NB).

PY - 1997/11/28

Y1 - 1997/11/28

N2 - Vibrational relaxation cross sections for an atom-molecule collision are calculated by explicit numerical solution of the coupled equations of scattering theory and shown to follow an inverse velocity dependence at very low initial kinetic energies of the incident atom, in accordance with Wigner's threshold law. Rate constants for H+H2(v, j=0)→H+H2(v′2 and found to vary by seven orders of magnitude between the deepest level v=0 and the vibrational level v=12.

AB - Vibrational relaxation cross sections for an atom-molecule collision are calculated by explicit numerical solution of the coupled equations of scattering theory and shown to follow an inverse velocity dependence at very low initial kinetic energies of the incident atom, in accordance with Wigner's threshold law. Rate constants for H+H2(v, j=0)→H+H2(v′2 and found to vary by seven orders of magnitude between the deepest level v=0 and the vibrational level v=12.

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U2 - 10.1016/S0009-2614(97)01051-8

DO - 10.1016/S0009-2614(97)01051-8

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-2

ER -

Threshold phenomena in ultracold atom-molecule collisions

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