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  • Open Access

Measurement of the lifetime of a metastable excited state in Bi−

M. K. Kristiansson1,*, J. Karls2, N. D. Gibson3, D. Hanstorp2, H. T. Schmidt1, and C. W. Walter3

  • 1Department of Physics, Stockholm University, Stockholm 10691, Sweden
  • 2Department of Physics, University of Gothenburg, Gothenburg 41296, Sweden
  • 3Department of Physics and Astronomy, Denison University, Granville, Ohio 43023, USA

  • *moa.kristiansson@fysik.su.se

Phys. Rev. A 105, L010801 – Published 18 January, 2022

DOI: https://doi.org/10.1103/PhysRevA.105.L010801

Abstract

The lifetime of the P03 state of Bi− has been measured by selective photodetachment in a cryogenic ion-beam storage ring. By measuring the lifetime as a function of applied laser powers and extrapolating to zero laser power, a lifetime of 16.0±0.5 s is deduced for electric quadrupole decay of the excited state to the ground sate. The result provides a stringent test of recent state-of-the art theoretical calculations.

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