Quantum dynamics of ultracold Na+Na2 collisions (CROSBI ID 267400)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Cvitaš, Marko Tomislav ; Soldan, P. ; Hutson, J.M. ; Hovault, P. ; Launay, J.-M.
engleski
Quantum dynamics of ultracold Na+Na2 collisions
Ultracold collisions between spin-polarized Na atoms and vibrationally excited Na-2 molecules are investigated theoretically, using a reactive scattering formalism (including atom exchange). Calculations are carried out on both pairwise additive and nonadditive potential energy surfaces for the quartet electronic state. The Wigner threshold laws are followed for energies below 10(-5) K. Vibrational relaxation processes dominate elastic processes for temperatures below 10(-3)-10(-4) K. For temperatures below 10(-5) K, the rate coefficients for vibrational relaxation (v=1-->0) are 4.8x10(-11) and 5.2x10(-10) cm(3) s(-1) for the additive and nonadditive potentials, respectively. The large difference emphasizes the importance of using accurate potential energy surfaces for such calculations.
ATOM-MOLECULE COLLISIONS ; BOSE-EINSTEIN CONDENSATE ; VIBRATIONAL-RELAXATION ; TEMPERATURES ; SCATTERING ; INSERTION ; THRESHOLD ; HE-3 ; CO
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Podaci o izdanju
89 (15)
2002.
153201
4
objavljeno
0031-9007
1079-7114
10.1103/PhysRevLett.89.153201