beta-decay studies of neutron-rich Tl, Pb, and Bi isotopes

A. I. Morales,G. Benzoni,A. Gottardo,J. J. Valiente-Dobon,N. Blasi, A. Bracco,F. Camera,F. C. L. Crespi,A. Corsi,S. Leoni,B. Million,R. Nicolini,O. Wieland,A. Gadea,S. Lunardi, M. Gorska,P. H. Regan,Zs. Podolyak, M. Pfuetzner,S. Pietri,P. Boutachkov,H. Weick, J. Grebosz,A. M. Bruce,J. Alcantara Nunez,A. Algora,N. Al-Dahan,Y. Ayyad,N. Alkhomashi,P. R. P. Allegro,D. Bazzacco,J. Benlliure,M. Bowry,M. Bunce,E. Casarejos,M. L. Cortes,A. M. Denis Bacelar,A. Y. Deo,G. de Angelis,C. Domingo-Pardo, M. Doncel,Zs. Dombradi, T. Engert, K. Eppinger, G. F. Farrelly, F. Farinon,E. Farnea,H. Geissel,J. Gerl,N. Goel,E. Gregor,T. Habermann,R. Hoischen, R. Janik,S. Klupp, I. Kojouharov,N. Kurz,S. Mandal,R. Menegazzo,D. Mengoni,D. R. Napoli,F. Naqvi,C. Nociforo,A. Prochazka,W. Prokopowicz,F. Recchia,R. V. Ribas,M. W. Reed,D. Rudolph,E. Sahin, H. Schaffner,A. Sharma,B. Sitar,D. Siwal, K. Steiger,P. Strmen, T. P. D. Swan,I. Szarka,C. A. Ur,P. M. Walker,H. -J. Wollersheim

Physical Review C（2014）

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摘要

The fragmentation of relativistic uranium projectiles has been exploited at the Gesellschaft fur Schwerionenforschung laboratory to investigate the beta decay of neutron-rich nuclei just beyond Pb-208. This paper reports on beta-delayed gamma decays of Tl211-213, Pb-215, and Bi215-219 de-exciting states in the daughters Pb211-213, Bi-215, and Po215-219. The resulting partial level schemes, proposed with the help of systematics and shell-model calculations, are presented. The role of allowed Gamow-Teller and first-forbidden beta transitions in this mass region is discussed.

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