Naslov
Quasibound states in long-range alkali dimers: Grid method calculations

Autori
Dulieu, Olivier ; Kosloff, Ronnie ; Masnou-Seeuws, Francoise ; Pichler, Goran

Izvornik
Journal of Chemical Physics (0021-9606) 107 (1997), 24; 10633-10642

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
long-range alkali dimers

Sažetak
The $0_g^+$ potential curves of the $K_2$ and $Rb_2$ alkali dimers present a small well ($42cm^-1$ and $93cm^-1$ respectively) located above the first $ns+n^2P_{;3/2};$ dissociation limit. We discuss the efficiency of two grid methods to compute the previously unknown energy and lifetime of the quasi-bound lying in such wells. One method is diagonalizing a Fourier Grid Hamiltonian, the other uses a propagation technique in imaginary time to filter out vibrational eigenfunctions. The lifetimes are extracted from the correlation function yielded after propagation in real time of those vibrational wavefunctions. Equivalent results are given by both methods. Two quasibound states are found for $K_2$, and three in $Rb_2$, with lifetimes varying from $20ps$ to $3ns$.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA