Dependence of Isospin Effect in the Multiplicity of Pre-Scission Particles on the Angular Momentum

YE Wei

Chinese Physics C> 2004, Vol. 28> Issue(6) : 611-616

Dependence of Isospin Effect in the Multiplicity of Pre-Scission Particles on the Angular Momentum

YE Wei ^,

Department of Physics,Southeast University,Nanjing 210096,China

Abstract
HTML
Reference
Related

PDF

Abstract：
The influence of angular momentum in the context of isospin effects on the emission of different light particles for heavy fissioning isotopic sources of ^189,202,212Po and for isobaric sources of ²⁰²Fr,²⁰²Po and ²⁰²Tl is studied within the framework of the Smoluchowski equation. Calculations show that the isospin effects on particle emission have a strong dependence on the angular momentum. Large angular momentum greatly weakens the influence of nuclear dissipation and isospin on particle emission. This means that to better extract dissipation strength with light particle multiplicities as a probe, it is important to select the compound systems with low spins, in addition to selecting a proper kind of particles for the systems with different isospins.

References

[1]

. Diosezegi I et al . Phys. Rev. , 2000, C61: 024613; Shaw N P et al.Phys. Rev. , 2000, C61: 044612; Diosezegi I et al. Phys. Rev. ,2000, C63: 0146112. Saxna A et al. Phys. Rev. , 2002, C65: 064601; Pant L M et al. Eur.Phys. J. , 2003, A16: 433. Mahat a K et al. Nucl. Phys. , 2003, A720: 2094. Rana G L et al . Eur. Phys. J. , 2003, A16: 199; Kaplan M et al.Nucl. Phys. , 2002, A686: 1095. Abe Y et al . Phys. Rep. , 1996, 275: 49; Fr..brich P, Gontchar I I.Phys. Rep. , 1998, 292: 1316. Pomorski K et al. Nucl. Phys. , 2000, A679: 257. Nadtochy P N et al. Phys Rev. , 2002, C65: 064615; Karpov A V etal. Phys. Rev. , 2001, C63: 0546108. Jurado B et al. Phys. Lett . , 2003, B553: 1869. Chaudhuri G, Pal S. Eur. Phys. J. , 2002, A14: 287; Chaudhuri G,Pal S. arXiV: nucl-th/0306003, 200310. LI B A et al. Int. J. Mod. Phys. , 1998, E7: 14711. LI B A, Udo Schrder U. Isospin Physics in Heavy-Ion Collisions at Intermediate Energies, Nova Science, New York, 200112. Bertsch G F et al . Nucl. Phys. , 1998, A490: 745; LI G Q, Machl eidt R. Phys. Rev. , 1993, C48: 170213. Pak R et al. Phys. Rev. Lett. , 1997, 78: 1022; 1997, 78: 102614. LI B A et al . Phys. Rev. Lett . , 1996, 76: 4492; 1997, 78: 1644;2000, 85: 422115. SHEN W Q et al. Nucl . Phys. , 1989 A491: 130; Suzuki T et al .Phys. Rev. Lett. , 1995, 75: 324116. XU H S et al . Phys. Rev. Lett . , 2000, 85: 71617. LIU J Y et al. Phys. Rev. Lett. , 2001, 86: 97518. YE W. High Energy Phys. and Nucl. Phys. , 2004, 28 ( 1) : 73 (in Chinese)(叶巍.高能物理与核物理,2004,28(1):73) 19. LU Z D et al. Z. Phys. , 1986, A323: 477; LU Z D et al. Phys. Rev. , 1990, C42: 707; YE W et al. Z. Phys. , 1997, A359: 385;YE W. Eur. Phys. J. , 2003, A18: 57120. Delagrange H et al . Z. Phys. , 1990, A323: 43721. Vaz L C, Alexander J M. Phys. Rep. , 1983, 97: 122. Sierk A J. Phys. Rev. , 1986, C33: 2039

[1]	FENG Zhao-Qing , JIN Gen-Ming , FU Fen , LI Jun-Qing . Isotopic Dependence of Production Cross Sections of Superheavy Nuclei in Hot Fusion Reactions. Chinese Physics C, 2007, 31(4): 366-370.
[2]	HAO Huan-Feng , XING Yong-Zhong , LIU Jian-Ye . Influence of Isospin\, Dependence\, of\, Nucleon-Nucleon\, Cross\, Section\, and\, Momentum\, DependentInteraction on the Isoscaling in Intermediate Energy Collisions. Chinese Physics C, 2007, 31(7): 651-654.
[3]	MAO Ying-Chen , GU Bai-Ping . Influence of Curvature and Compressibility Energies upon Prescission Neutron Emission of Neutron-Deficient Fissioning Systems. Chinese Physics C, 2007, 31(3): 258-263.
[4]	YE Wei . Possible Dependence of Dissipation Strength on Angular Momentum. Chinese Physics C, 2006, 30(8): 759-760.
[5]	MAO Ying-Chen , YE Wei , REN Zhong-Zhou . Effect of Deformation on Isospin Effect of Pre-scission Particle Emission. Chinese Physics C, 2006, 30(5): 423-427.
[6]	LIU Jian-Ye , GUO Wen-Jun , Xing Yong-Zhong , LI Xi-Guo . Isospin Effect of Momentum Dependent Interaction in Heavy Ion Collisions. Chinese Physics C, 2005, 29(5): 456-460.
[7]	ZUO Wei , CHEN Ji-Yan , LI Bao-An , LUO Pei-Yan , Lombardo U . Momentum and Density Dependence of Isospin Symmetry Potential in Asymmetric Nuclear Matter. Chinese Physics C, 2005, 29(9): 881-885.
[8]	YE Wei . Dependence of Isospin Effects of Particle Evaporation on the Nuclear Shell Structure. Chinese Physics C, 2005, 29(3): 268-272.
[9]	YE Wei . Effects of Isospin on Multiplicity of Prescission Particles of Light Fissioning Systems. Chinese Physics C, 2004, 28(1): 73-77.
[10]	YE Wei . Influence of Angular Momentum on Shell Effects of Pre-scission Particle Emission of a Light Closed Shell Nucleus ¹³²Sn. Chinese Physics C, 2004, 28(2): 181-185.
[11]	ZUO Wei , LIU Jian-Ye , LI Jun-Qing . Properties of Isospin Asymmetric Nuclear Matter and Extended BHF Approach (Ⅵ)Proton and Neutron Mean Free Paths and Their Isospin Dependence. Chinese Physics C, 2003, 27(10): 888-891.
[12]	YE Wei . Effects of Shell on Pre-Scission Particle Emission. Chinese Physics C, 2003, 27(9): 798-802.
[13]	YE Wei . Isotopic Effects in Prescission Particle Emission. Chinese Physics C, 2003, 27(3): 233-237.
[14]	WANG Meng , WANG Jian-Song , GUO Zhong-Yan , XIAO Guo-Qing , ZHAN Wen-Long , LI Jia-Xing , SUN Zhi-Yu , CHEN Zhi-Qiang , WANG Wu-Sheng , TIAN Wen-Dong , MAO Rui-Shi . Isospin Effects on the Yield of LCPs in the Reaction of RNB. Chinese Physics C, 2002, 26(8): 803-808.
[15]	ZHAO Qiang , GUO Wen-Jun , LIU Jian-Ye , ZUO Wei , WANG Shun-Jin . Isospin Dependence of Preequilibrium Nucleon Emission in Intermediate Energy Heavy Ion Collision. Chinese Physics C, 2001, 25(3): 244-250.
[16]	Ye Wei , Shen Wenqing , Feng Jun , Ma Yugang , Wang Jiansong , Cai Xiangzhou , Wu Xizhen , Feng Renfa , Lu Zhongdao . Effect of Fission Path on Prescission Particle Emission. Chinese Physics C, 1998, 22(7): 639-645.
[17]	Ye Wei , Shen Wenqing , Lu Zhongdao , Feng Jun , Ma Yugang , Wang Jiansong . Effect of Angular Momentum on Prescission Particle Multiplicity for the Reaction of 10.6MeV/u ⁸⁴Kr on ²⁷Al. Chinese Physics C, 1998, 22(3): 265-270.
[18]	Chen Liewen , Zhang Xiaodong , Ge Lingxiao . Isospin Effects on Pre-equilibrium NucleonEmission in Heavy Ion Collisions. Chinese Physics C, 1996, 20(12): 1091-1096.
[19]	WU Yuan-Fang , LIU Lian-Shou . The two Normalization schemes of Factorial Moments in High Energy Collisions and the Dependence Intermittency Degree on Average Transverse Momentum. Chinese Physics C, 1992, 16(3): 235-240.
[20]	CHANG HSI-CHEN . ANGULAR MOMENTA LIMITATION WITH RESPECT TO PARTICLE EMISSION OF NUCLEI. Chinese Physics C, 1977, 1(1): 79-82.

Access

Get Citation

YE Wei. Dependence of Isospin Effect in the Multiplicity of Pre-Scission Particles on the Angular Momentum[J]. Chinese Physics C, 2004, 28(6): 611-616.

YE Wei. Dependence of Isospin Effect in the Multiplicity of Pre-Scission Particles on the Angular Momentum[J]. Chinese Physics C, 2004, 28(6): 611-616. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2003-09-16
Revised: 1900-01-01

Article Metric

Article Views(2736)
PDF Downloads(541)
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

Dependence of Isospin Effect in the Multiplicity of Pre-Scission Particles on the Angular Momentum

Corresponding author: YE Wei,

Department of Physics,Southeast University,Nanjing 210096,China

Received Date: 2003-09-16

Accepted Date: 1900-01-01

Available Online: 2004-06-05

Abstract: The influence of angular momentum in the context of isospin effects on the emission of different light particles for heavy fissioning isotopic sources of ^189,202,212Po and for isobaric sources of ²⁰²Fr,²⁰²Po and ²⁰²Tl is studied within the framework of the Smoluchowski equation. Calculations show that the isospin effects on particle emission have a strong dependence on the angular momentum. Large angular momentum greatly weakens the influence of nuclear dissipation and isospin on particle emission. This means that to better extract dissipation strength with light particle multiplicities as a probe, it is important to select the compound systems with low spins, in addition to selecting a proper kind of particles for the systems with different isospins.

HTML

Reference (1)

Dependence of Isospin Effect in the Multiplicity of Pre-Scission Particles on the Angular Momentum

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article