Lifetime and population of the 2S state in muonic protium and deuterium
Diepold, Marc · Amaro, Fernando D. · Antognini, Aldo · Biraben, François · Cardoso, João M. R. · Covita, Daniel S. · Dax, Andreas · Dhawan, Satish · Fernandes, Luis M. P. · Giesen, Adolf · Gouvea, Andrea L. · Graf, Thomas · Hänsch, Theodor W. · Indelicato, Paul · Julien, Lucile · Kao, Cheng-Yang · Knowles, Paul · Kottmann, Franz · Bigot, Eric-Olivier Le · Liu, Yi-Wei · Lopes, José A. M. · Ludhova, Livia · Monteiro, Cristina M. B. · Mulhauser, Françoise · Nebel, Tobias · Nez, François · Rabinowitz, Paul · Santos, Joaquim M. F. dos · Schaller, Lukas A. · Schuhmann, Karsten · Schwob, Catherine · Taqqu, David · Veloso, João F. C. A. · Vogelsang, Jan · Pohl, Randolf
الأصل · EN
Radiative deexcitation (RD) of the metastable 2S state of muonic protium and deuterium atoms has been observed. In muonic protium, 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 +0.57 -0.33 % and a lifetime of τₛhort(μd) = 138 +32 -34 ns. We see evidence for RD of long-lived μd(2S) with a lifetime of τₗong(μd) = 1.15 +0.75 -0.53 μs. This is interpreted as formation and decay of excited muonic molecules.
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