PMID: 15245002Jul 13, 2004Paper

Radiative lifetime of a bound excited state of Te-

Physical Review Letters
A EllmannA Källberg

Abstract

We report on the first experimental study of the lifetime of a bound excited state of a negative ion. A new experimental technique was developed and used to measure the radiative lifetime of the 5p(5) (2)P(1/2) level of Te-. The experiment was performed in a magnetic storage ring, where a laser beam was applied along one of the straight sections. In the experiment the population of the excited J=1/2 level was probed each time the Te- ions passed through the laser field. A decay curve was built up by sampling the population of the excited level of the Te- ions as a function of time after injection into the ring. A multiconfiguration Dirac-Hartree-Fock calculation was performed in conjunction with the experiment. The calculation yielded a radiative lifetime of 0.45 s, in excellent agreement with the measured value of 0.42(5) s.

References

Oct 1, 1995·Physical Review. a·P KristensenT Andersen
Apr 6, 2001·Physical Review Letters·D RostoharA Schmitt

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