Author/Authors :
T. Grahn، نويسنده , , A. Dewald، نويسنده , , O. Moller، نويسنده , , R. Julin، نويسنده , , C.W. Beausang، نويسنده , , S. Christen، نويسنده , , I.G. Darby، نويسنده , , S. Eeckhaudt، نويسنده , , P.T. Greenlees، نويسنده , , A. Gorgen، نويسنده , , K. Helariutta، نويسنده , , J. Jolie، نويسنده , , P. Jones، نويسنده , , S. Juutinen، نويسنده , , H. Kettunen، نويسنده , , T. Kroll، نويسنده , , R. Krücken، نويسنده , , Y. Le Coz، نويسنده , , M. Leino، نويسنده , , A.-P. Lepp?nen، نويسنده , , et al.، نويسنده ,
Abstract :
Lifetimes of prolate intruder states in 186Pb and 188Pb and oblate intruder states in 194Po have been determined through recoil distance Doppler-shift lifetime measurements. Deformation parameters of |β2|=0.29(5) and |β2| = 0.17(3) have been extracted from experimental B(E2) values for the prolate and the oblate bands, respectively. The present study addresses the phenomenon of shape coexistence typical for the nuclei near Z=82 and N=104, providing information on configuration mixing of intrinsic structures of the nuclei of interest. The results are compared with the available lifetime data and theoretical results for neutron-deficient Po, Pb, Hg and Pt nuclei. Furthermore, new self-consistent mean-field calculations have been carried out for 194Po.
Keywords :
114Cd(83Kr , 3n) , Measured , lifetimes for intruder states using the recoil distance Doppler-shift method , 188Pb , deduced , B(E2) , Nuclear reactions , quadrupole moment , 106Pd , Deformation parameters , 108Pd , ??-coin , E? , ? , E=340–375 MeV , 194Po , 186
