Direct excitation of the 'dark' b {sup 3{Pi}} state predicted by deperturbation analysis of the A {sup 1}{Sigma}{sup +}-b {sup 3{Pi}} complex in KCs

Journal Article · Wed Sep 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.032506· OSTI ID:21448683

Tamanis, M; Klincare, I; Kruzins, A; Nikolayeva, O; Ferber, R; Pazyuk, E A; Stolyarov, A V ^[1]

---

1. Laser Center, Department of Physics, University of Latvia, 19 Rainis Blvd., Riga LV-1586 (Latvia)

The diode-laser-induced fluorescence spectra b {sup 3}{Pi}{sub {Omega}=0}{sup +}{yields}X{sup 1}{Sigma}{sup +} originated from the rovibronic levels of the 'dark' triplet b {sup 3}{Pi}{sub {Omega}=0}{sup +} state of KCs dimers were recorded with a Fourier transform spectrometer with a resolution of 0.03 cm{sup -1}. Term values of 30 rovibronic levels (v{sub b0}*{element_of}[14,18];J{sup '}{element_of}[47,134]) below the minimum of perturbing A {sup 1}{Sigma}{sup +} state were determined with 0.003-0.01 cm{sup -1} uncertainty. The optimal excitation and detection lines for very weak spin-forbidden b {sup 3}{Pi}{sub {Omega}=0}{sup +}-X{sup 1}{Sigma}{sup +} transitions have been properly predicted in the framework of the coupled-channels deperturbation analysis recently performed for the singlet-triplet A {sup 1}{Sigma}{sup +}-b {sup 3}{Pi}{sub {Omega}=0,1,2}{sup +} complex [A. Kruzins et al., Phys. Rev. A 81, 042509 (2010)]. The lowest observed triplet level has only 8.6% of singlet admixture.

• OSTI ID: 21448683
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ALLOYS
ANGULAR MOMENTUM
CESIUM
COLLISIONS
COUPLED CHANNEL THEORY
DIMERS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTROSCOPY
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUORESCENCE SPECTROSCOPY
FOURIER TRANSFORM SPECTROMETERS
INTERMETALLIC COMPOUNDS
LASER RADIATION
MEASURING INSTRUMENTS
METALS
MOLECULE COLLISIONS
MULTIPLETS
PARTICLE PROPERTIES
PHOTON COLLISIONS
PHOTON-MOLECULE COLLISIONS
POTASSIUM
RADIATIONS
RESOLUTION
SPECTROMETERS
SPECTROSCOPY
SPIN
TRIPLETS