NDLI: Evolution from dinucleus to mononucleus and its implication in the synthesis of superheavy nuclei

Content Provider	Springer Nature Link
Author	Liang, Yu Jie Zhu, Min Liu, Zu Hua Wang, Wen Zhong
Copyright Year	2012
Abstract	The evolution of neck for the asymmetric system 58Fe + 244Pu at E c.m. = 260 MeV has been studied with the coupled Langevin equations in two-dimensional collective space and the results compared to those obtained with a one-dimensional approach under the frozen assumption. It is found that the coupling between the radial and neck degrees of freedom reduces the drift velocity of neck growth and delays the transition from dinucleus to mononucleus. Besides, the coupling brings the system into a somehow elongated shape when the injection into the asymmetric fission valley takes place, hence, the fusion probability and the relevant evaporation residue (ER) cross-sections decrease. For the system 58Fe + 244Pu , the ER cross-sections decrease by about 30% as compared to those obtained under the frozen approximation. Therefore, we may arrive at the conclusion that for the heavy asymmetric systems such as 58Fe + 244Pu the coupling between different degrees of freedom has important effects on the evolution from dinucleus to mononucleus and the frozen approximation is basically not satisfied as far as the neck dynamics is concerned. However, as compared to the symmetric reactions, the influence of the neck dynamics on the fusion hindrance factor of heavy systems is much weaker for the asymmetric reactions.
Starting Page	1
Ending Page	4
Page Count	4
File Format	PDF
ISSN	14346001
Journal	The European Physical Journal A - Hadrons and Nuclei
Volume Number	48
Issue Number	10
e-ISSN	1434601X
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2012-10-15
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nuclear Physics, Heavy Ions, Hadrons Particle and Nuclear Physics Nuclear Fusion
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics

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