Accurate determination of the scattering length of metastable Helium atoms using dark resonances between atoms and exotic molecules - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2005

Accurate determination of the scattering length of metastable Helium atoms using dark resonances between atoms and exotic molecules

Résumé

We present a new measurement of the s-wave scattering length a of spin-polarized helium atoms in the 2^3S_1 metastable state. Using two-photon photoassociation spectroscopy and dark resonances we measure the energy E_{v=14}= -91.35 +/- 0.06 MHz of the least bound state v=14 in the interaction potential of the two atoms. We deduce a value of a = 7.512 +/- 0.005 nm, which is at least one hundred times more precise than the best previous determinations and is in disagreement with some of them. This experiment also demonstrates the possibility to create exotic molecules binding two metastable atoms with a lifetime of the order of 1 microsecond.

Dates et versions

hal-00013858 , version 1 (14-11-2005)

Identifiants

Citer

S. Moal, M. Portier, J. Kim, J. Dugué, U. D. Rapol, et al.. Accurate determination of the scattering length of metastable Helium atoms using dark resonances between atoms and exotic molecules. 2005. ⟨hal-00013858⟩
50 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More