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arXiv · 1511.04228

The lifetime of the bound excited level in Ni$^-$

M. Kamińska·V. T. Davis·O. M. Hole·R. F. Nascimento·K. C. Chartakunchand·M. Blom·M. Björkhage·A. Källberg·P. Löfgren·P. Reinhed·S. Rosén·A. Simonsson·R. D. Thomas·S. Mannervik·P. A. Neill·J. S. Thompson·H. T. Schmidt·H. Cederquist·D. Hanstorp
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Abstract

The intrinsic lifetime of the upper level in the bound-bound 3d$^9$4s$^2$ $^2$D$_{3/2}$ $\rightarrow$ 3d$^9$4s$^2$ $^2$D$_{5/2}$ radiative transition in Ni$^-$ was measured to be 15.1 $\pm$ 0.4 s. The experiment was performed at cryogenic temperatures in one of the ion-beam storage rings of the DESIREE (Double ElectroStatic Ion Ring Experiment) facility at Stockholm University. The storage lifetime of the Ni$^-$ ion-beam was measured to be close to five minutes at a ring temperature of 13 K.

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M. Kamińska, V. T. Davis, O. M. Hole, R. F. Nascimento, K. C. Chartakunchand, M. Blom, M. Björkhage, A. Källberg, P. Löfgren, P. Reinhed, S. Rosén, A. Simonsson, R. D. Thomas, S. Mannervik, P. A. Neill, J. S. Thompson, H. T. Schmidt, H. Cederquist, D. Hanstorp. 2015-12-02. The lifetime of the bound excited level in Ni$^-$. https://doi.org/10.1103/physreva.93.012512

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