2020 Impact factor 3.043
Hadrons and Nuclei
Eur. Phys. J. A 1, 61-64

Emission order of light particles and light fragments from hot nuclei followed by binary fission

Zhi Yong He - Gen Ming Jin - Zu Yu Li - Li Min Duan - Guang Xi Dai - Bao Guo Zhang - He Yu Wu - Wan Xin Wen - Yu Jin Qi - Qing Zheng Luo - Su Fang Wang

Institute of Modern Physics, Chinese Academy of Sciences, P. O. Box 31, Lanzhou 730000, Gansu Province, People's Republic of China

Received: 3 June 1997 / Revised version: 23 July 1997

Abstract
Emission orders of light charged particles and Li fragments from highly excited fissioning nuclei in the reaction of 40Ar+197Au at Ebeam/A=25 MeV have been studied by measuring difference velocity distributions of two correlated particles at small relative angles in coincidence with two fission fragments. By comparing the data with three-body trajectory calculations, we found that high velocity deuterons are emitted prior to high velocity Li fragments but low velocity deuterons are emitted after low velocity Li fragments. On the other hand, no preferential emission was observed among light particles, such as protons and deuterons. Furthermore, the emission orders are found to depend only weakly on the mass asymmetry of fission fragments.

PACS
25.70.z Low and intermediate energy heavy ion reactions - 25.70.Lm Strongly damped collisions - 25.70.Pq Multifragment emission and correlations


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