Experimental study of the Na2 31Πg state

Chin Chun Tsai; Ray Yuan Chang; Hui Wen Wu; Thou Jen Whang

doi:10.1016/j.jms.2005.03.003

Experimental study of the Na₂ 3¹Π_g state

Chin Chun Tsai, Ray Yuan Chang, Hui Wen Wu, Thou Jen Whang

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The 3¹Π_g state of Na₂ is experimentally investigated by using high resolution cw optical-optical double resonance spectroscopy. A single line Ar⁺ laser (total of 9 lines) is used to pump the sodium dimers from thermally populated ground state X1Σg+ to the intermediate B¹Π_u state. Then a single mode Ti:sapphire laser is used to probe the 3¹Π_g state. Violet fluorescence from highly Rydberg excited states (mainly 2³Π _g or 3³Π_g states which are transferred from 3¹Π_g state via collisions) to the a3Σu+ state is monitored by a filtered photomultiplier tube and a lock-in amplifier. Compared with previous studies [C.C. Tsai, J.T. Bahns, W.C. Stwalley, J. Chem. Phys. 99 (1993) 7417], a wider range of rotational quantum numbers of data field are observed. A set of Dunham coefficients and the Rydberg-Klein-Rees potential energy curve of the 3¹Π_g state are deduced from all the observed rovibrational levels.

Original language	English
Pages (from-to)	66-72
Number of pages	7
Journal	Journal of molecular spectroscopy
Volume	232
Issue number	1
DOIs	https://doi.org/10.1016/j.jms.2005.03.003
Publication status	Published - 2005 Jul

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry

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10.1016/j.jms.2005.03.003

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title = "Experimental study of the Na2 31Πg state",

abstract = "The 31Πg state of Na2 is experimentally investigated by using high resolution cw optical-optical double resonance spectroscopy. A single line Ar+ laser (total of 9 lines) is used to pump the sodium dimers from thermally populated ground state X1Σg+ to the intermediate B1Πu state. Then a single mode Ti:sapphire laser is used to probe the 31Πg state. Violet fluorescence from highly Rydberg excited states (mainly 23Π g or 33Πg states which are transferred from 31Πg state via collisions) to the a3Σu+ state is monitored by a filtered photomultiplier tube and a lock-in amplifier. Compared with previous studies [C.C. Tsai, J.T. Bahns, W.C. Stwalley, J. Chem. Phys. 99 (1993) 7417], a wider range of rotational quantum numbers of data field are observed. A set of Dunham coefficients and the Rydberg-Klein-Rees potential energy curve of the 31Πg state are deduced from all the observed rovibrational levels.",

author = "Tsai, {Chin Chun} and Chang, {Ray Yuan} and Wu, {Hui Wen} and Whang, {Thou Jen}",

note = "Funding Information: We gratefully acknowledge the support of this work by the National Space Program Office and National Science Council, Taiwan. ",

year = "2005",

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doi = "10.1016/j.jms.2005.03.003",

language = "English",

volume = "232",

pages = "66--72",

journal = "Journal of molecular spectroscopy",

issn = "0022-2852",

publisher = "Academic Press Inc.",

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T1 - Experimental study of the Na2 31Πg state

AU - Tsai, Chin Chun

AU - Chang, Ray Yuan

AU - Wu, Hui Wen

AU - Whang, Thou Jen

N1 - Funding Information: We gratefully acknowledge the support of this work by the National Space Program Office and National Science Council, Taiwan.

PY - 2005/7

Y1 - 2005/7

N2 - The 31Πg state of Na2 is experimentally investigated by using high resolution cw optical-optical double resonance spectroscopy. A single line Ar+ laser (total of 9 lines) is used to pump the sodium dimers from thermally populated ground state X1Σg+ to the intermediate B1Πu state. Then a single mode Ti:sapphire laser is used to probe the 31Πg state. Violet fluorescence from highly Rydberg excited states (mainly 23Π g or 33Πg states which are transferred from 31Πg state via collisions) to the a3Σu+ state is monitored by a filtered photomultiplier tube and a lock-in amplifier. Compared with previous studies [C.C. Tsai, J.T. Bahns, W.C. Stwalley, J. Chem. Phys. 99 (1993) 7417], a wider range of rotational quantum numbers of data field are observed. A set of Dunham coefficients and the Rydberg-Klein-Rees potential energy curve of the 31Πg state are deduced from all the observed rovibrational levels.

AB - The 31Πg state of Na2 is experimentally investigated by using high resolution cw optical-optical double resonance spectroscopy. A single line Ar+ laser (total of 9 lines) is used to pump the sodium dimers from thermally populated ground state X1Σg+ to the intermediate B1Πu state. Then a single mode Ti:sapphire laser is used to probe the 31Πg state. Violet fluorescence from highly Rydberg excited states (mainly 23Π g or 33Πg states which are transferred from 31Πg state via collisions) to the a3Σu+ state is monitored by a filtered photomultiplier tube and a lock-in amplifier. Compared with previous studies [C.C. Tsai, J.T. Bahns, W.C. Stwalley, J. Chem. Phys. 99 (1993) 7417], a wider range of rotational quantum numbers of data field are observed. A set of Dunham coefficients and the Rydberg-Klein-Rees potential energy curve of the 31Πg state are deduced from all the observed rovibrational levels.

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Experimental study of the Na₂ 3¹Π_g state

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