Half-lives of several states in neutron-rich nuclei from spontaneous fission of 252Cf

J. K. Hwang, A. V. Ramayya, J. H. Hamilton, D. Fong, C. J. Beyer, P. M. Gore, E. F. Jones, Y. X. Luo, J. O. Rasmussen, S. J. Zhu, S. C. Wu, I. Y. Lee, P. Fallon, M. A. Stoyer, S. J. Asztalos, T. N. Ginter, J. D. Cole, G. M. Ter-Akopian, and R. Donangelo Physics Department, Vanderbilt University, Nashville, Tennessee 37235, USA Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA Institute of Modern Physics, Chinese Academy of Science, Lanzhou, People’s Republic of China Joint Institute for Heavy Ion Research, Oak Ridge, Tennessee 37830, USA Department of Physics, Tsinghua University, Beijing 100084, People’s Republic of China Lawrence Livermore National Laboratory, Livermore, California 94550, USA Idaho National Engineering and Environmental Laboratory, Idaho Falls, Idaho 83415, USA Flerov Laboratory for Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Russia Universidade Federal do Rio de Janeiro, Caixa Postal 68528, RG, Brazil (Received 16 December 2003; published 14 May 2004)