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29 March 2024
 
  » pubmed » pmid16090870

 Article overview


Simultaneous measurement of beta- decay to bound and continuum electron states
T Ohtsubo ; F Bosch ; H Geissel ; L Maier ; C Scheidenberger ; F Attallah ; K Beckert ; P Beller ; D Boutin ; T Faestermann ; B Franczak ; B Franzke ; M Hausmann ; M Hellström ; E Kaza ; P Kienle ; O Klepper ; H-J Kluge ; C Kozhuharov ; Yu A Litvinov ; M Matos ; G Münzenberg ; F Nolden ; Yu N Novikov ; M Portillo ; T Radon ; J Stadlmann ; M Steck ; T Stöhlker ; K Sümmerer ; K Takahashi ; H Weick ; M Winkler ; T Yamaguchi ;
Date 29 Jul 2005
Journal Phys Rev Lett, 95 (5), 052501
AbstractWe report the first measurement of a ratio lambda(beta(b))/lambda(beta(c)) of bound-state ((lambda(beta(b))) and continuum-state (lambda(beta(c))) beta(-)-decay rates for the case of bare 207Tl81+ ions. These ions were produced at the GSI fragment separator FRS by projectile fragmentation of a 208Pb beam. After in-flight separation with the Brho-deltaE-Brho method, they were injected into the experimental storage-ring ESR at an energy of 400.5A MeV, stored, and electron cooled. The number of both the 207Tl81+ ions and their bound-state beta(-)-decay daughters, hydrogen-like 207Pb81+ ions, were measured as a function of storage time by recording their Schottky-noise intensities. The experimental result, lambda(beta(b))/lambda(beta(c)) = 0.188(18), is in very good agreement with the value of 0.171(1) obtained from theory employing spectra of allowed transitions.
Source PubMed, pmid16090870
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