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MO: Molekülphysik
MO 11: Theory: Structure and Dynamics
MO 11.1: Talk
Thursday, April 5, 2001, 15:45–16:00, H107
Formation of cold molecules by Feshbach resonances. — •Philippe Pellegrini, Olivier Dulieu, and Françoise Masnou-Seeuws — Laboratoire Aimé Cotton, bât 505, Campus d’Orsay, 91405 ORSAY Cedex FRANCE
We have developed a method, using a complex absorbing potential [1,2] together with the Fourier Grid Hamiltonian Representation [3], to study the formation of molecules by Feshbach resonances within a time-independent formalism.
Diagonalization of the Hamiltonian yields complex eigenvalues, from which we extract both the energy and the width of the resonances.
As a first application, we have studied the predissociation of the Cs2 C 1Πu state coupled to the dissociative (2)3Σu+ state : the inverse reaction in a Cs gas at room temperature has been observed as an efficient channel for dimer formation in the parity violation experiment of M. Linz and M. A. Bouchiat [4]. Other schemes in cold atomic samples will be presented at the conference.
References
[1] G. Jolicard and E. J. Austin, Chem. Phys. Lett. 121, 106 (1985).
[2] M. Monnerville and J. M. Robbe, J. Chem. Phys. 101, 7580 (1994).
[3] V. Kokouline, O. Dulieu, R. Kosloff and F. Masnou-Seeuws , J. Chem. Phys. 110, 9865 (1999).
[4] M. Lintz and M. A. Bouchiat, Phys. Rev. Lett. 80, 2570 (1998).