Pressure shift and broadening of the resonance line of barium atoms in liquid helium

Author(s): S. I. Kanorsky, M. Arndt, R. Dziewior, A. Weis, T. W. Hänsch

Journal: Phys. Rev. B

Volume: 50

Page(s): 6296–6302

Year: 1994

DOI Number: 10.1103/PhysRevB.50.6296

Link: Link to publication

Abstract:

We have measured the pressure broadening and shift of the excitation and emission lines of the 6s2 1S0→6s6p 1P1 transition of Ba atoms implanted in liquid and solid helium at 1.5 K. The observed spectra are quantitatively explained within the adiabatic line-broadening theory by assuming a bubble structure of the trapping sites for the Ba atoms. The evolution of the bubble shape and size in the optical excitation-deexcitation cycle is modeled theoretically.

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