Evidence for Different Fission Behavior of Hot Nuclei Formed in Central and Peripheral Collisions of <sup>40</sup>Ar+<sup>209</sup>Bi Reaction at 25 MeV/u

Chin. Phys. Lett.

1999, Vol. 16

Issue (7): 499-501 DOI:

Original Articles

Evidence for Different Fission Behavior of Hot Nuclei Formed in Central and Peripheral Collisions of ⁴⁰Ar+²⁰⁹Bi Reaction at 25 MeV/u

WU En-jiu;ZHENG Ji-wen;XIAO Zhi-gang;ZHANG Chun;TAN Ji-lian;YIN Shu-zhi;WANG Su-fang;JIN Gen-ming;YIN Xu;SONG Ming-tao;JIN Wei-yang;PENG Xing-ping;LI Zu-yu;WU He-yu;HE Zhi-yong;JIANG Dong-xing¹ ;QIAN Xing¹

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 ¹ Department of Technical Physics, Peking University, Beijing 100871

Cite this article:

WU En-jiu, ZHENG Ji-wen, XIAO Zhi-gang et al 1999 Chin. Phys. Lett. 16 499-501

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Abstract Correlated fission fragments from the reaction of 25 MeV/u ⁴⁰Ar+²⁰⁹Bi and their further correlation with a particles have been studied for peripheral and central collisions simultaneously. The excitation energy at scission deduced from postscission multiplicity is about 172.5 MeV. The fission timescale deduced from prescission multiplicity is about 4 x10^-21 s. Systematic analysis of the mass and energy distributions of fission fragments as a function of the initial temperature of hot fissioning nuclei reveals the existence of different fission behavior of hot nuclei formed in central and peripheral collisions. Experimental data demonstrate the change of fission behavior at T ～ 4MeV.

Keywords: 25.85.-w 25.85.Ge

Published: 01 July 1999

PACS:	25.85.-w	(Fission reactions)
	25.85.Ge	(Charged-particle-induced fission)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1999/V16/I7/0499

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	WU En-jiu
	ZHENG Ji-wen
	XIAO Zhi-gang
	ZHANG Chun
	TAN Ji-lian
	YIN Shu-zhi
	WANG Su-fang
	JIN Gen-ming
	YIN Xu
	SONG Ming-tao
	JIN Wei-yang
	PENG Xing-ping
	LI Zu-yu
	WU He-yu
	HE Zhi-yong
	JIANG Dong-xing
	QIAN Xing

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