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Observation of the 7Πg State of Na2 by Optical−Optical Double Resonance Spectroscopy

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posted on 2007-10-04, 00:00 authored by Chanchal Chaudhuri, Ray-Yuan Chang, Wei-Xiang Chen, Wei-Chia Fang, Jun-Ping Cheng, Thou-Jen Whang, Chin-Chun Tsai
The 71Πg Rydberg state of Na2 correlating with the separated atom limit Na(3s) + Na(5p) has been observed using high-resolution cw optical−optical double resonance spectroscopy. A total of 104 identified rovibrational levels in the range v = 0−12 and 11 ≤ J ≤ 44 have been assigned to the 71Πg state. Dunham coefficients were determined, and the Rydberg−Klein−Rees potential curve in the range of R = 2.99−4.66 Å was derived for the 71Πg state using the observed quantum levels. The important molecular properties are the potential minimum Te = 36 633.00(23) cm-1 at Re = 3.6313(29) Å, ωe = 115.75(13) cm-1, and Be = 0.111 22(17) cm-1. A detailed discussion of this investigation of the 71Πg state is provided.

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