Advanced

Collisional properties of trapped cold chromium atoms

Pavlovic, Z; Roos, Björn LU ; Cote, R and Sadeghpour, H R (2004) In Physical Review A (Atomic, Molecular and Optical Physics) 69(3). p.1-030701
Abstract
We report on calculations of the elastic cross section and thermalization rate for collision between two maximally spin-polarized chromium atoms in the cold and ultracold regimes, relevant to buffer-gas and magneto-optical cooling. We calculate ab initio potential-energy curves for Cr-2 and the van der Waals coefficient C-6, and construct interaction potentials between two colliding Cr atoms. We explore the effect of shape resonances on the elastic cross section, and find that they dramatically affect the thermalization rate. Our calculated value for the s-wave scattering length is compared in magnitude with a recent measurement. We propose that a dip in the elastic rate coefficient could be experimentally exploited to obtain an accurate... (More)
We report on calculations of the elastic cross section and thermalization rate for collision between two maximally spin-polarized chromium atoms in the cold and ultracold regimes, relevant to buffer-gas and magneto-optical cooling. We calculate ab initio potential-energy curves for Cr-2 and the van der Waals coefficient C-6, and construct interaction potentials between two colliding Cr atoms. We explore the effect of shape resonances on the elastic cross section, and find that they dramatically affect the thermalization rate. Our calculated value for the s-wave scattering length is compared in magnitude with a recent measurement. We propose that a dip in the elastic rate coefficient could be experimentally exploited to obtain an accurate value for the scattering length. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A (Atomic, Molecular and Optical Physics)
volume
69
issue
3
pages
1 - 030701
publisher
American Physical Society (APS)
external identifiers
  • wos:000220605200005
  • scopus:4644237374
ISSN
1050-2947
DOI
10.1103/PhysRevA.69.030701
language
English
LU publication?
yes
id
4e8122a3-5567-4496-b59b-3786254f0564 (old id 139686)
date added to LUP
2007-07-17 13:10:33
date last changed
2017-04-09 03:43:21
@article{4e8122a3-5567-4496-b59b-3786254f0564,
  abstract     = {We report on calculations of the elastic cross section and thermalization rate for collision between two maximally spin-polarized chromium atoms in the cold and ultracold regimes, relevant to buffer-gas and magneto-optical cooling. We calculate ab initio potential-energy curves for Cr-2 and the van der Waals coefficient C-6, and construct interaction potentials between two colliding Cr atoms. We explore the effect of shape resonances on the elastic cross section, and find that they dramatically affect the thermalization rate. Our calculated value for the s-wave scattering length is compared in magnitude with a recent measurement. We propose that a dip in the elastic rate coefficient could be experimentally exploited to obtain an accurate value for the scattering length.},
  author       = {Pavlovic, Z and Roos, Björn and Cote, R and Sadeghpour, H R},
  issn         = {1050-2947},
  language     = {eng},
  number       = {3},
  pages        = {1--030701},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {Collisional properties of trapped cold chromium atoms},
  url          = {http://dx.doi.org/10.1103/PhysRevA.69.030701},
  volume       = {69},
  year         = {2004},
}