Abstract:
This paper proposes a general method to investigate Feshbach resonances in atomic collisions similar to Cs(6 s ) + Cs(6 p ) in the thermal or cold regime. In order to compute the predissociation widths of the C 1 Π u (6 s + 5 d ) bound vibrational levels of Cs2, coupled both with the (2) 3 Σ + u (6 s + 6 p ) continuum and with the (2) 3 Π u (6 s + 5 d ) vibrational series, a Fourier grid method is implemented, with an optical potential. A convenient way of optimizing the latter is proposed. A large number of resonances are found and calculations of their cross-sections for stabilization into ground state molecules show that the rate may be important. This confirms the interpretation of Lintz and Bouchiat [Phys. Rev. Lett. 80, 2570 (1998)] who observed dimer formation in cell experiments. Possible generalization to the cold regime relies on the possibility to tune the position of a resonance to coincide with the maximum of the collisional energy distribution.
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Received 14 February 2002 Published online 28 June 2002
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Pellegrini, P., Dulieu, O. & Masnou-Seeuws, F. Formation of Cs molecules via Feshbach resonances stabilized by spontaneous emission: theoretical treatment with the Fourier grid method. Eur. Phys. J. D 20, 77–86 (2002). https://doi.org/10.1140/epjd/e2002-00120-5
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DOI: https://doi.org/10.1140/epjd/e2002-00120-5