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

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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

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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

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Received: 2003-09-16
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

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.

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

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