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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 4, Iss. 7 — Jul. 10, 2006
  • pp: 376–378

Collisional broadening of some 2^1Delta_g<--B^1Pi_u lines in Na2 molecules by optical-optical double resonance spectroscopy

Jing Liu, Kang Dai, and Yifan Shen  »View Author Affiliations


Chinese Optics Letters, Vol. 4, Issue 7, pp. 376-378 (2006)


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Abstract

Using the optical-optical double resonance (OODR) technique, we have studied the collisional broadening of some 2^1Delta_g<--B^1Pi_u lines in Na2 molecules. A single line Ar+ laser is used to pump the sodium dimers from thermally populated ground state X^1Sigma+_g level to the intermediate B^1Pi_u state. Then, a single-mode diode laser is used to probe the doubly excited 2^1Delta_g state. The broadening rate coefficient is determined from the slope of the total linewidth versus Ne density curve. We obtain the average value k_(br)=(1.1+-0.5)*10^(-8) cm3/s. The collisional excitation transfer between rotational levels of the B^1Pi_u state (i.e., B^1Pi_u(2,83/84)<--B^1Pi_u(2,82)) is also investigated. The rates can be determined from the relative intensities of the main peak and satellite lines, combined with a rate equation model. The rates of 1.25*10^(6) and 1.07*10^(6) /s are obtained, respectively.

© 2006 Chinese Optics Letters

OCIS Codes
(020.0020) Atomic and molecular physics : Atomic and molecular physics
(020.2070) Atomic and molecular physics : Effects of collisions
(020.3690) Atomic and molecular physics : Line shapes and shifts

Citation
Jing Liu, Kang Dai, and Yifan Shen, "Collisional broadening of some 2^1Delta_g<--B^1Pi_u lines in Na2 molecules by optical-optical double resonance spectroscopy," Chin. Opt. Lett. 4, 376-378 (2006)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-4-7-376

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