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Bulletin of the American Physical Society

Blue-detuned photoassociation in Rb$_2$

Bellos, David Rahmlow, Ryan Carollo, Jayita Banerjee, Edward E. Eyler, P. L. Gould, William C. Stwalley

Published Jun 14, 2011• 0 citations
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Blue-detuned photoassociation in Rb2_22​
BLUE-DETUNED PHOTOASSOCIATION SPECTRUM IN Rb2_22​
We report on the observation of blue-detuned photoassociation in Rb(2), in which vibrational levels are energetically above the corresponding excited atomic asymptote. (85)Rb atoms in a MOT were photoassociated at short internuclear distance to levels of the 1(3)Π(g) state at a rate of approximately 5 × 10(4) molecules s(-1). We have observed most of the predicted vibrational levels for all four spin-orbit components; 0(+)(g), 0(-)(g), 1(g), and 2(g), including levels of the 0(+)(g) outer well. These molecules decay to the metastable a(3)Σ(+)(u) state, some preferentially to the v'' = 0 level, as we have observed for photoassociation to the v' = 8 level of the 1(g) component.
We report on the observation of blue-detuned photoassociation in Rb2, in which vibrational levels are energetically above the corresponding excited atomic asymptote. 85Rb atoms in a MOT were photoassociated at short internuclear distances to levels of the (1)3Pi g state at a rate of approximately 5x10^4 molecules/s. We have observed most of the predicted vibrational levels for all four spin-orbit components 0g+, 0g-, 1g, and 2g, including levels of the 0g+ outer well. These molecules decay to the metastable a3Sigma u+ state, some preferentially to the v"=0 level, as we have observed for photoassociation to the v'=8 level of the 1g component.
OBSERVATION OF BLUE-DETUNED PHOTOASSOCIATION TO THE 2 (0g+)(0_g^+)(0g+​) STATE OF 85^{85}85Rb2_22​ VIA REMPI
We have observed atomic line self-broadening of Cs near 7P3∕27{P}_{3∕2}7P3∕2​ and 7P1∕27{P}_{1∕2}7P1∕2​ atomic lines at ultracold temperatures using a magneto-optical trap and resonant ionization detection. We have observed blue satellite band features at detunings of 560 and 800MHz800\phantom{\rule{0.3em}{0ex}}\mathrm{MHz}800MHz, respectively, as well as sharp hyperfine-split photoassociative spectra on the red wings of each line and also on the blue wings. Possible explanations of these features are discussed.