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25 April 2024

» arxiv » 1307.6775

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Lifetime and population of the 2S state in muonic protium 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 ; Andrea L. Gouvea ; Thomas Graf ; Theodor W. Hänsch ; Paul Indelicato ; Lucile Julien ; Cheng-Yang Kao ; Paul Knowles ; Franz Kottmann ; Eric-Olivier Le Bigot ; Yi-Wei Liu ; José A. M. Lopes ; Livia Ludhova ; Cristina M. B. Monteiro ; Françoise Mulhauser ; Tobias Nebel ; François Nez ; Paul Rabinowitz ; Joaquim M. F. dos Santos ; Lukas A. Schaller ; Karsten Schuhmann ; Catherine Schwob ; David Taqqu ; João F. C. A. Veloso ; Jan Vogelsang ; Randolf Pohl ;
Date:	25 Jul 2013
Abstract:	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 {mu}p(2S) component, and give an upper limit for RD of long-lived {mu}p(2S) atoms. In muonic deuterium at 1 hPa, 3.1 +-0.3 % of all stopped muons form {mu}d(2S) atoms. The short-lived 2S component has a population of 1.35 +0.57 -0.33 % and a lifetime of { au}_short({mu}d) = 138 +32 -34 ns. We see evidence for RD of long-lived {mu}d(2S) with a lifetime of { au}_long({mu}d) = 1.15 +0.75 -0.53 {mu}s. This is interpreted as formation and decay of excited muonic molecules.
Source:	arXiv, 1307.6775
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