TY - JOUR
T1 - Complex scattering lengths in multi-channel atom-molecule collisions
AU - Balakrishnan, N.
AU - Kharchenko, V.
AU - Forrey, R. C.
AU - Dalgarno, A.
N1 - Funding Information:
We thank Dr. R. Côté for useful discussions. 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 - It is shown that in the presence of inelastic scattering, zero energy elastic and inelastic scattering can be characterized by a complex scattering length, the imaginary part of which is related directly to the total inelastic scattering cross section. Collisions between H atoms and vibrationally excited H2 molecules are investigated. Zero energy cross sections for all vibrational states of H2 and the corresponding complex scattering lengths are reported using accurate quantum mechanical calculations. We obtain large values of the elastic cross sections which we attribute to s-wave bound and quasi-bound states of H⋯H2(v). The energies and lifetimes of the quasi-bound states are extracted from the complex scattering lengths.
AB - It is shown that in the presence of inelastic scattering, zero energy elastic and inelastic scattering can be characterized by a complex scattering length, the imaginary part of which is related directly to the total inelastic scattering cross section. Collisions between H atoms and vibrationally excited H2 molecules are investigated. Zero energy cross sections for all vibrational states of H2 and the corresponding complex scattering lengths are reported using accurate quantum mechanical calculations. We obtain large values of the elastic cross sections which we attribute to s-wave bound and quasi-bound states of H⋯H2(v). The energies and lifetimes of the quasi-bound states are extracted from the complex scattering lengths.
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U2 - 10.1016/S0009-2614(97)01052-X
DO - 10.1016/S0009-2614(97)01052-X
M3 - Article
AN - SCOPUS:0002061141
SN - 0009-2614
VL - 280
SP - 5
EP - 9
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-2
ER -