Shapes of Pb ground states from -decay studies using the total-absorption technique

全吸収型測定によるPbの基底状態変形

Estvez Aguado, M. E.*; Algora, A.*; Agramunt, J.*; Rubio, B.*; Tain, J. L.*; Jordn, D.*; Fraile, L. M.*; Gelletly, W.*; Frank, A.*; Csatls, M.*; Csige, L.*; Dombrdi, Zs.*; Krasznahorkay, A.*; Ncher, E.*; Sarriguren, P.*; Borge, M. J. G.*; Briz, J. A.*; Tengblad, O.*; Molina, F.*; Moreno, O.*; Kowalska, M.*; Fedosseev, V. N.*; Marsh, B. A.*; Fedorov, D. V.*; Molkanov, P. L.*; Andreyev, A.; Selivestov, M. D.*; Burkhard, K.*; Hller, W*

Estvez Aguado, M. E.*; Algora, A.*; Agramunt, J.*; Rubio, B.*; Tain, J. L.*; Jordn, D.*; Fraile, L. M.*; Gelletly, W.*; Frank, A.*; Csatls, M.*; Csige, L.*; Dombrdi, Zs.*; Krasznahorkay, A.*; Ncher, E.*; Sarriguren, P.*; Borge, M. J. G.*; Briz, J. A.*; Tengblad, O.*; Molina, F.*; Moreno, O.*; Kowalska, M.*; Fedosseev, V. N.*; Marsh, B. A.*; Fedorov, D. V.*; Molkanov, P. L.*; Andreyev, A.; Selivestov, M. D.*; Burkhard, K.*; Hller, W*

The decay of Pb has been studied using the total absorption technique at the ISOLDE (CERN) facility. The -decay strength deduced from the measurements, combined with QRPA theoretical calculations, allow us to infer that the ground states of the Pb isotopes are spherical. These results represent the first application of the shape determination method using the total absorption technique for heavy nuclei and in a region where there is considerable interest in nuclear shapes and shape effects.