Optical-optical double resonance with two dye lasers: Rotational analysis of the E2Σ-B2Σ system of Ca35Cl

Peter J. Domaille, Timothy C. Steimle, David O. Harris

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A complete rotational analysis of the E 2Σ-B 2Σ system of CaCl has been accomplished using two tunable dye lasers. The first cw laser is tuned to a known B 2Σ-X 2Σ transition to produce a finite concentration of molecules in a particular quantum state. Subsequently, a second pulsed dye laser is used to record the E 2Σ-B 2Σ excitation spectrum from this state prepared level. The method vastly simplifies an otherwise congested molecular spectrum. The data are combined with previous microwave measurements on the X 2Σ state and optical data on the B2Σ- X2Σ system to give the following molecular constants (cm -1). Uncertainties are 95% confidence limits in the last digit. X2Σ B2Σ E2Σ Te 0 16 856.69(2) 34268.17(98) ωe 369.8(10) 366.8(10) 413.7(16) ωeXe 1.13(20) 1.28(20) 1.67(82) Be 0.1522325(45) 0.1546940(82) 0.163412(17) αe 7.998(39) × 10-4 8.839(67) × 10-4 8.66(10)× 10 -4 γav(spin rotation) 0.00135(6) -0.0652(2) 0.0046(5)

Original languageEnglish (US)
Pages (from-to)4977-4982
Number of pages6
JournalThe Journal of chemical physics
Issue number11
StatePublished - Jan 1 1978
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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