Photoassociation to the 2(1)Sigma(g)(+) state in ultracold 85Rb2 in the presence of a shape resonance

Abstract

We report the first observation of photoassociation to the 2(1)Sigma(g)(+) state of 85Rb2 . We have observed two vibrational levels (v'=98, 99) below the 5s1/2+5p1/2 atomic limit and eleven vibrational levels (v'=102-112) above it. The photoassociation---and subsequent spontaneous emission---occur predominantly between 15 and 20 Bohr in a region of internuclear distance best described as a transition between Hund's case (a) and Hund's case (c) coupling. The presence of a g-wave shape resonance in the collision of two ground-state atoms affects the photoassociation rate and lineshape of the J'= 3 and 5 rotational levels.

to appear in PRA

References in corpus (6)

• Coherent optical transfer of Feshbach molecules to a lower vibrational state
• Hyperfine, rotational, and vibrational structure of the triplet ground state of Rb molecules
• Imaging of s and d partial-wave interference in quantum scattering of identical bosonic atoms
• Feshbach Spectroscopy of a Shape Resonance
• Efficient formation of deeply bound ultracold molecules probed by broadband detection
• Light forces in ultracold photoassociation

Cited by in corpus (6)

• Short-range Photoassociation of LiRb
• Upper Bound to the Ionization Energy of 85Rb2
• Short-range photoassociation from the inner wall of the lowest triplet potential of ${}^{85}$Rb${}_2$
• High-Resolution Spectroscopy of {R}ydberg Molecular States of ${}^{85}${R}b${}_2$ Near the $5s+7p$ Asymptote
• Observation and Analysis of Resonant Coupling Between Near-Degenerate Levels of the 2 1Σg+ and 1 1 Πg States of Ultracold 85Rb2
• The C(2)${}^1{\Pi }_u$ state in Rb${}_2$. Observation and deperturbation