“Neck” Formation and Fragmentation in Intermediate Energy Heavy-ion Collisions

Chen Liewen; Ge Lingxiao; Zhang Fengshou

Chinese Physics C> 1997, Vol. 21> Issue(S4) : 73-78

“Neck” Formation and Fragmentation in Intermediate Energy Heavy-ion Collisions

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China

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Abstract：
Under different impact parameters, the collision system of 30 MeV/u ⁴⁰Ca+⁴⁰Ca is investigated in terms of the QMD model. It is shown that the number of EMFs is largest at impact parameter b=6 fm, which is due to the formation of "neck" in the collision process. It is also found that, in the process of the formation 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 the shape instability.
- "neck" fragmentation ,
- intermediate mass fragment ,
- relative density fluctuation ,
- shape instability ,
- dynamical instability
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Chen Liewen, Ge Lingxiao and Zhang Fengshou. “Neck” Formation and Fragmentation in Intermediate Energy Heavy-ion Collisions[J]. Chinese Physics C, 1997, 21(S4): 73-78.

Chen Liewen, Ge Lingxiao and Zhang Fengshou. “Neck” Formation and Fragmentation in Intermediate Energy Heavy-ion Collisions[J]. Chinese Physics C, 1997, 21(S4): 73-78. shu

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Received: 1996-11-07

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Supported by the National Natural Science Foundation of China and LWTZ-1298, at the Chinese Academy of Sciences.

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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-ion Collisions

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China

Received Date: 1996-11-07

Fund Project: Supported by the National Natural Science Foundation of China and LWTZ-1298, at the Chinese Academy of Sciences.

Abstract: Under different impact parameters, the collision system of 30 MeV/u ⁴⁰Ca+⁴⁰Ca is investigated in terms of the QMD model. It is shown that the number of EMFs is largest at impact parameter b=6 fm, which is due to the formation of "neck" in the collision process. It is also found that, in the process of the formation 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 the shape instability.