Chinese Physics C > 1995, Vol. 19 > Issue(10): 945-951

Fluctuation and Emission of Intermediate Mass Fragments inHeavy Ion Collisions at Medium Energy

Zhang Xiaodong^,,
Ge Lingxiao

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000

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Abstract：
Based on the quantum molecular dynamics model, the time and energy evolutions of intermediate mass fragments (IMF)and its dynamical origin are systematically studied for ⁴⁰Ca+ ⁴⁰Ca central collision.The transition of reaction mechanism, the relation between the density fluctuation and IMF and the time scale of IMF emission are discussed in detail.The relative density fluctuation attains to maximum at energy region of 50-80MeV/u corresponding to an obvious increase of IMF. The possible occurrence of total disassembly at incident energy of about 65MeV/u for the studied reactions is predicted.Meanwhile, a saturation value (140fm/c) for time scale of multifragmentation is obtained.

References

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Zhang Xiaodong and Ge Lingxiao. Fluctuation and Emission of Intermediate Mass Fragments inHeavy Ion Collisions at Medium Energy[J]. Chinese Physics C, 1995, 19(10): 945-951.

Zhang Xiaodong and Ge Lingxiao. Fluctuation and Emission of Intermediate Mass Fragments inHeavy Ion Collisions at Medium Energy[J]. Chinese Physics C, 1995, 19(10): 945-951. 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

Fluctuation and Emission of Intermediate Mass Fragments inHeavy Ion Collisions at Medium Energy

Zhang Xiaodong^,
Ge Lingxiao

Corresponding author:Zhang Xiaodong,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000

Received Date:1900-01-01
Accepted Date:1900-01-01
Available Online:1995-10-05

Abstract:Based on the quantum molecular dynamics model, the time and energy evolutions of intermediate mass fragments (IMF)and its dynamical origin are systematically studied for⁴⁰Ca+⁴⁰Ca central collision.The transition of reaction mechanism, the relation between the density fluctuation and IMF and the time scale of IMF emission are discussed in detail.The relative density fluctuation attains to maximum at energy region of 50-80MeV/u corresponding to an obvious increase of IMF. The possible occurrence of total disassembly at incident energy of about 65MeV/u for the studied reactions is predicted.Meanwhile, a saturation value (140fm/c) for time scale of multifragmentation is obtained.