Two Modes in Three-fold Fragmentation of hot Nuclei

Dai Guangxi; Wu Heyu; Fu Yanbiao; Duan Limin; He Zhiyong; Li Zuyu; Zhang Baoguo; Liu Guoxing

Chinese Physics C> 1999, Vol. 23> Issue(1) : 51-58

Two Modes in Three-fold Fragmentation of hot Nuclei

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000

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Abstract：
Splitting of a hot nucleus into three comparable pieces in the ⁴⁰Ar+¹⁵⁹Tb reaction at 30MeV/u was measured. For the splitting there are two modes: one is a successive binary process, such as sequential fission or a cascade fission, another is a prompt threefold fragmentation (3F). The paper presents the identification between the two modes of the threefold fragmentation by the experimental results, such as the mass distribution of the fragments, the orientation of the fragmentation plane, etc.. In the two modes, the prompt one with collective deformation is emphasized.Furthermore fitting the mass distribution and finding a scaling law about the most-probable mass ratio in the 3F are given. In addition, the orientation of the fragmentation plane could also be used to measure the impact parameters, there for to distinguish 3F events associated with cental collision from the sequential fission after a quasi-elastic scattering or deep-inelastic collision.

References

[1]

Tsien San–Tsiang, Ho Zah–Wei, Chastel et al. J. de Phys., 1947, 8:200–2112 Toke J, Bock R, Dai G X et al. Nucl. Phys., 1985, A440:327–3653 Stefanini A A, Casini G Maurenzig P R et al. Z. Phys., 1995, A351: 167–186 4 Glassel P, Harrach D V, Specht H J et al. Z. Phys., 1983, A310: 189–2165 Dai G X, Bock R,Gobbi A et al. Procd. of Tsukuba int. Symp. on H–I Fusion reaction held in 1984. In:Lee S M ed. Singapore: world Scientific, 1985, 205–2166 Zhang F S. Z. Phys., 1996, A356: 163–1707 Lopez J A, Randrup J. Nucl. Phys., 1990, A512:354–368 8 Haddad F Royer G J. Phys. G:Nucl. Part. Phys., 1992, 18:L153–L158 9 Dai G X, Natowitz J, Wada R et al. Nucl. Phys., 1994, A568:601–616 10 Wang C Y. Ann. Phys., (N. Y.), 1973, 7:27911 Moretto L G Kin T, Colonna N et al. Phys. Rev. Lett, 1992, 69: 1884–1887 12 Xu H M. Phys. Rev., 1992, C46:R2144–R214813 Louvel M, Luban G Bizard G et al. Phys. Lett, 1994, B320:221–226 14 Dai G X, Wu H Y, Duan L M et al. Chinese J. Nucl. Phys., 1996, 18:187–19915 Hilscher D Rossner H, Cramer B et al. Phys. Rev. Lett, 1989, 62: 1099–110216 Dai G X. Chen K L, Jin G M et al. Nuclear Technique. (in Chinese), 1995, 18:220–223 (戴光曦,陈克良,靳根明等.核技术,1995,18:220—223) 17 Dai G X, Wu H Y, He Z Y et al. Nucl. Phys., 1995, A583: 173c–180c

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[19]	LI Wen-Zhu , DONG Shao-Jing . MONTE CARLO STUDY OF SU(3) LATTICE GAUGE THEORY FOR TWO ALTERANTIVE ACTIONS. Chinese Physics C, 1985, 9(4): 502-504.
[20]	ZHANG YU-SHUN , LI YANG-GUO , WANG WEI-WEI , CHEN XIAO-TIAN , RUAN TU-NAN . THE SU(6) “UNITARY ENERGY BAND” STRUCTURE IN THE TRIBARYON SYSTEM. Chinese Physics C, 1981, 5(5): 521-530.

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Dai Guangxi, Wu Heyu, Fu Yanbiao, Duan Limin, He Zhiyong, Li Zuyu, Zhang Baoguo and Liu Guoxing. Two Modes in Three-fold Fragmentation of hot Nuclei[J]. Chinese Physics C, 1999, 23(1): 51-58.

Dai Guangxi, Wu Heyu, Fu Yanbiao, Duan Limin, He Zhiyong, Li Zuyu, Zhang Baoguo and Liu Guoxing. Two Modes in Three-fold Fragmentation of hot Nuclei[J]. Chinese Physics C, 1999, 23(1): 51-58. shu

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Received: 1997-12-09
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Two Modes in Three-fold Fragmentation of hot Nuclei

Corresponding author: Dai Guangxi,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000

Received Date: 1997-12-09

Accepted Date: 1900-01-01

Available Online: 1999-01-05

Abstract: Splitting of a hot nucleus into three comparable pieces in the ⁴⁰Ar+¹⁵⁹Tb reaction at 30MeV/u was measured. For the splitting there are two modes: one is a successive binary process, such as sequential fission or a cascade fission, another is a prompt threefold fragmentation (3F). The paper presents the identification between the two modes of the threefold fragmentation by the experimental results, such as the mass distribution of the fragments, the orientation of the fragmentation plane, etc.. In the two modes, the prompt one with collective deformation is emphasized.Furthermore fitting the mass distribution and finding a scaling law about the most-probable mass ratio in the 3F are given. In addition, the orientation of the fragmentation plane could also be used to measure the impact parameters, there for to distinguish 3F events associated with cental collision from the sequential fission after a quasi-elastic scattering or deep-inelastic collision.

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Two Modes in Three-fold Fragmentation of hot Nuclei

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