＂Neck＂ formation and Fragmentation in Intermediate Energy Heavy-Lon Collisions

Chen Liewen; Ge Lingxiao; Zhang Fengshou

Chinese Physics C> 1997, Vol. 21> Issue(11) : 1018-1023

＂Neck＂ formation and Fragmentation in Intermediate Energy Heavy-Lon Collisions

Institute of Modern Physic, the chinese Academy of SCIENCES, Lanzhou 730000

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Abstract：
Under different impact parameters, the collision system of 30MeV/u ⁴⁰Ca+⁴⁰Ca is investigated in terms of QltllD model. It is .shown that the number of IMFs is the largest at impact pararneter b=6fm, which is due to the formation of ＂neck＂ in collision process. Meanwhile, it is found the. in the process of fonmadon of ＂neck＂, the growth of the relative density fluctuation of the reaction system is very slow and the saturation value is small, which imply the character of shape instability.

References

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L. G. Morreto iet al/i., iPhys/i. iRev/i. iLett/i., 69(1992)1884.[2]W. Bauer, G. F. Berstch, H. Schulz, iPhys/i. iRev/i. iLett/i., 69(1992)467.[3]D. E. Fields iet al/i., iPhys/i. iRev/i. Left., 69(1992)3713.[4]M. Colonna iet al/i., in XXXII Inter. Winter Meeting on Nucl. Phys., Bormio, Italy, 24-28 Jun. 1994,p232.[5]C. Montoya iet al/i., in XXXII Inter. Winter Meeting on iNucl/i. iPhys/i., Bormio, Italy,24-28 Jun.1994, p506.[6]W. U. Schroder, J. R Huizenga, in Treatise on Heavy-Ion Science, edited by D. A. Bromley(Plenum, New York, 1984)Vol. 2 and references therein.BR[7]陈列文，张晓东，葛凌霄，高能物理与核物理，20(1996)1091.[8]张晓东，葛凌霄高能物理与核物理，19(1995)951[9]H. Horiuchi, T. Maruyama, A. Ohnishi, in Inter. Symp. on Heavy-Ion iPhys/i. and Application, Lanzhou,China, Oct. 1990,p25.[10]K. Hagel iet al/i., iPhys/i. iRev/i. iLett/i., 68(1992)2141.[11]M. B. Tsang, in XXXII Inter. Winter Meeting on Nucl. Phys., Bormio, Italy, 24-28 Jun. 1994,p512.

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Chen Liewen, Ge Lingxiao and Zhang Fengshou. ＂Neck＂ formation and Fragmentation in Intermediate Energy Heavy-Lon Collisions[J]. Chinese Physics C, 1997, 21(11): 1018-1023.

Chen Liewen, Ge Lingxiao and Zhang Fengshou. ＂Neck＂ formation and Fragmentation in Intermediate Energy Heavy-Lon Collisions[J]. Chinese Physics C, 1997, 21(11): 1018-1023. shu

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

＂Neck＂ formation and Fragmentation in Intermediate Energy Heavy-Lon Collisions

Corresponding author: Chen Liewen,

Institute of Modern Physic, the chinese Academy of SCIENCES, Lanzhou 730000

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1997-11-05

Abstract: Under different impact parameters, the collision system of 30MeV/u ⁴⁰Ca+⁴⁰Ca is investigated in terms of QltllD model. It is .shown that the number of IMFs is the largest at impact pararneter b=6fm, which is due to the formation of ＂neck＂ in collision process. Meanwhile, it is found the. in the process of fonmadon of ＂neck＂, the growth of the relative density fluctuation of the reaction system is very slow and the saturation value is small, which imply the character of shape instability.