Bochum 2009 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
HK: Fachverband Hadronen und Kerne
HK 16: Nuclear Structure and Dynamics II
HK 16.7: Talk
Monday, March 16, 2009, 18:15–18:30, H-ZO 60
Reaction studies about the Q-value influence on the production of superheavy elements — •R. Graeger1, A. Gorshkov1, A. Türler1, A. Yakushev1, C.E. Düllmann2, E. Jäger2, J. Khuyagbaatar2, J. Krier2, D. Rudolph2, M. Schädel2, B. Schausten2, J. Dvorak3, M. Chelnokov4, A. Kuznetsov4, J. Even5, D. Hild5, J. Kratz5, J.P. Omtvedt6, F. Samadani6, K. Nishio7, and Q. Zhi8 — 1TU München, Garching, Germany — 2GSI, Darmstadt, Germany — 3LBNL, Berkeley, USA — 4FLNR, Dubna, Russian Federation — 5U Mainz, Mainz, Germany — 6U Oslo, Oslo, Norway — 7JAEA, Tokai, Japan — 8IMP, Lanzhou, China
Superheavy elements only exist due to nuclear shell effects. Theoretical calculations predict maximum stability at doubly-magic spherical nucleus with Z=114 and N=184 and near Z=108 and N=162 with the inclusion of higher orders of deformation. The doubly-magic nucleus 270Hs has been observed for the first time by J. Dvorak, et al. in 4n evaporation channel of the reaction 26Mg + 248Cm [1]. Recently, the formation of 270Hs in a 4n evaporation channel in the fusion reactions with different asymmetry has been studied by theoretical calculations by Liu and Bao [2]. The reactions 48Ca + 226Ra and 36S+ 238U are predicted to result in a higher cross section due to a more negative reaction Q value. The measurement of the nuclear fusion reactions 36S+ 238U at GSI, Darmstadt and 48Ca + 226Ra at FLNR, Dubna has already been started. The first preliminary results will be presented in this contribution. [1]Dvorak et al., Phys.Rev.Lett., Vol97, 242501 (2006) [2]Liu and Bao, Phys.Rev. C, Vol74, 057602 (2006)