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

Abstract
HTML
Reference
Related

PDF

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

[1]	SHI Yuan-Mei , PING Jia-Lun , HE Han-Xin . Two Renormalization Approaches for the Dyson-Schwinger Equations in the Infrared. Chinese Physics C, 2006, 30(9): 833-837.
[2]	MO Xiao-Hu . Further Corroboration of Equivalence of Two χ² Forms. Chinese Physics C, 2006, 30(2): 140-146.
[3]	LU Xiao , LI Qing-Run , ZHAO Wei-Qin . A Comparison Between Two Different Optical Potentials for the ³He+ ¹²C Scattering at the Energy 72MeV. Chinese Physics C, 2004, 28(1): 53-55.
[4]	JIN Yi , XIE Qu-Bing , LI Shi-Yuan . Influence of Interference Terms on Probability of Color Connections among Partons in e⁺e^－→qq+ng Process. Chinese Physics C, 2003, 27(4): 282-287.
[5]	MO Xiao-Hu , ZHU Yong-Sheng . Equivalence of Two χ² Forms. Chinese Physics C, 2003, 27(5): 371-376.
[6]	SHAO Feng-Lan , XIE Qu-Bing . Ratio of Baryon to Meson and Baryon Antibaryon Correlation in e⁺e^－ Annihilation under Two Kinds of Color Connections. Chinese Physics C, 2002, 26(8): 779-785.
[7]	Dai Guangxi , He Zhiyong , Fu Yanbiao , Duan Limin , Li Zuyu , Zhang Baoguo , Liu Guoxing , Wu Heyu . Comparison Between Hot Nuclei Temperature Values Deduced by Two Methods in ⁴⁰Ar+¹⁵⁹Tb and ^natAg Reactions at 30MeV/u. Chinese Physics C, 1999, 23(3): 223-230.
[8]	Li Long . Two Kinds of Signature Splittings in Odd-A Superdeformed Nuclei. Chinese Physics C, 1998, 22(8): 732-738.
[9]	Liu Jianye , Liu Hang , Di Toro , Zuo Wei . Systematic Comparisions of Theoretical Calculation Resultson Heavy Ion Collision Between TBCTT and QMD. Chinese Physics C, 1998, 22(8): 707-712.
[10]	Shen Qixing , Chao Ming , Yu Hong . Moment Analysis of J/ψ Decay Processes and Comparison of Results in Two Frames. Chinese Physics C, 1997, 21(5): 408-412.
[11]	Dai Guangxi , Wu Heyu , Luo Qingzheng , Duan Limin , He Zhiyong , Zhang Baoguo , Li Zuyu , Wen Wanxin , Qi Yujin . Fourfold Fragmentation in Hot Nuclei. Chinese Physics C, 1996, 20(10): 870-876.
[12]	Dai Guangxi , Wu Heyu , Duan Limin , Li Zuyu , He Zhiyong , Luo Qingzheng , Zhang Baoguo . The Threefold Fragmentation of Hot Nuclei With Medium Mass Number. Chinese Physics C, 1996, 20(7): 588-595.
[13]	Li Qingrun , Yang Yongxu . A Comparison of Two Different Models for ¹²C+¹²C Scattering. Chinese Physics C, 1994, 18(12): 1115-1118.
[14]	Wu Heyu , Dai Guangxi . Ternary Fission with Cascade Fission Model. Chinese Physics C, 1994, 18(8): 730-735.
[15]	YANG Yong-Xu , LI Qing-Run . A Comparison Between two Different α-Particle Wave Functions via Heavy ion Scattering. Chinese Physics C, 1992, 16(8): 762-764.
[16]	QIU Rong . THE EQUIVALENCE OF TWO TRANSFORMATIONS OF THE INVARIANCE OF LAGRANGIAN FUNCTION IN NON-ABELIAN GAUGE FIELD. Chinese Physics C, 1989, 13(4): 302-308.
[17]	LU Jian-Xin , RUAN Tu-Nan . GAUGE TRANSFORMATION IN STRING THEORY. Chinese Physics C, 1989, 13(4): 309-315.
[18]	XIE Shu-Qin , ZHANG Qi-Ren . AN SU(3) SYMMETRY IN THE TRIBARYON SYSTEM. Chinese Physics C, 1988, 12(5): 673-682.
[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.

Access

Get Citation

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

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

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

Article Metric

Article Views(2692)
PDF Downloads(559)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
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.

HTML

Reference (1)

Two Modes in Three-fold Fragmentation of hot Nuclei

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article