Related papers: Characterization of the lowest excited-state ro-vibrational level of $^{23}$Na$^{87}$Rb

Characterization of the lowest excited-state ro-vibrational level of $^{23}$Na$^{87}$Rb

URL: http://arxiv.org/abs/2108.00624v1
Date: Mon, 2 Aug 2021 04:28:53 GMT
Title: Characterization of the lowest excited-state ro-vibrational level of $^{23}$Na$^{87}$Rb
Authors: Junyu He, Junyu Lin, Romain Vexiau, Nadia Bouloufa, Olivier Dulieu and Dajun Wang
Abstract summary: We investigate the lowest ro-vibrational level of the $b3Pi$ state with high resolution laser spectroscopy. This electronic spin-forbidden $X1Sigma+ leftrightarrow b3Pi$ transition features a nearly diagonal Franck-Condon factor.
Score: 2.0575351445652057
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Starting from an ultracold sample of ground-state $^{23}$Na$^{87}$Rb molecules, we investigate the lowest ro-vibrational level of the $b^3\Pi$ state with high resolution laser spectroscopy. This electronic spin-forbidden $X^1\Sigma^+ \leftrightarrow b^3\Pi$ transition features a nearly diagonal Franck-Condon factor and has been proposed useful for probing and manipulating the ultracold molecular gas. We measure the transition strength directly by probing the ac Stark shift induced by near resonance light and determine the total excited-state spontaneous emission rate by observing the loss of molecules. From the extracted branching ratio and the theoretical modeling, we find that the leakage to the continuum of the $a^3\Sigma^+$ state plays the dominant role in the total transition linewidth. Based on these results, we show that it is feasible to create optical trapping potentials for maximizing the rotational coherence with laser light tuned to near this transition.

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