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26 April 2024

» arxiv » physics/9703011

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Photodetachment study of the 1s3s4s ^4S resonance in He^-
Andreas E. Klinkmueller ; Gunnar Haeffler ; Dag Hanstorp ; Igor Yu. Kiyan ; Uldis Berzinsh ; Christopher W. Ingram ; David J. Pegg ; James R. Peterson ;
Date:	6 Mar 1997
Journal:	Phys. Rev. A, 56(4), 2788-2791, (1997)
Subject:	Atomic Physics \| physics.atom-ph
Abstract:	A Feshbach resonance associated with the 1s3s4s ^{4}S state of He^{-} has been observed in the He(1s2s ^{3}S) + e^- (epsilon s) partial photodetachment cross section. The residual He(1s2s ^{3}S) atoms were resonantly ionized and the resulting He^+ ions were detected in the presence of a small background. A collinear laser-ion beam apparatus was used to attain both high resolution and sensitivity. We measured a resonance energy E_r = 2.959 255(7) eV and a width Gamma = 0.19(3) meV, in agreement with a recent calculation.
Source:	arXiv, physics/9703011
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