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Lifetime and population of the 2S state in muonic hydrogen and deuterium
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Lifetime and population of the 2S state in muonic hydrogen and deuterium

Marc Diepold, Fernando D. Amaro, Aldo Antognini, François Biraben, João M. R. Cardoso, Daniel S. Covita, Andreas Dax, Satish Dhawan, Luis M. P. Fernandes, Adolf Giesen, …
Physical Review A - Atomic, Molecular, and Optical Physics, 卷.88(4), 042520
2013
DOI: https://doi.org/10.1103/PhysRevA.88.042520

摘要

Atomic and Molecular Physics and Optics
Radiative deexcitation (RD) of the metastable 2S state of muonic hydrogen and deuterium atoms has been observed. In muonic hydrogen, we improve the precision on lifetime and population (formation probability) values for the short-lived μp(2S) component, and give an upper limit for RD of long-lived μp(2S) atoms. In muonic deuterium at 1 hPa, 3.1±0.3% of all stopped muons form μd(2S) atoms. The short-lived 2S component has a population of 1.35-0.33+0.57% and a lifetime of τ2Sshort(μd)=138-34+32 ns. We see evidence for RD of long-lived μd(2S) with a lifetime of τ2Slong(μd)=1. 15-0.53+0.75μs. This is interpreted as formation and decay of excited muonic molecules. © 2013 American Physical Society.

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