%0 Journal Article
%T Measurement of the Survival Probabilities for Hot Fusion Reactions
%A R. Yanez
%A W. Loveland
%A L. Yao
%A J. s. Barrett
%A S. Zhu
%A B. B. Back
%A T. L. Khoo
%A M. Alcorta
%A M. Albers
%J Physics
%D 2014
%I arXiv
%R 10.1103/PhysRevLett.112.152702
%X We have studied the fission-neutron emission competition in highly excited $^{274}$Hs (Z=108) (where the fission barrier is due to shell effects) formed by a hot fusion reaction. Matching cross bombardments ($^{26}$Mg + $^{248}$Cm and $^{25}$Mg + $^{248}$Cm) were used to identify the properties of first chance fission of $^{274}$Hs. A Harding-Farley analysis of the fission neutrons emitted in the $^{25,26}$Mg + $^{248}$Cm was performed to identify the pre- and post-scission components of the neutron multiplicities in each system. ($\Gamma$$_{n}$/$\Gamma$$_{t}$) for the first chance fission of $^{274}$Hs (E$^{\ast}$ = 63 MeV) is 0.89 $\pm$ 0.13, i.e., $\sim$ 90 $%$ of the highly excited nuclei survive.The high value of that survival probability is due to dissipative effects during de-excitation. A proper description of the survival probabilities of excited superheavy nuclei formed in hot fusion reactions requires consideration of both dynamic and static (shell-related) effects.
%U http://arxiv.org/abs/1403.4322v1