Isospin Effect of Charged Particle Multiplicity in Intermediate Energy Heavy Ion Collisions

HU Rong-Jiang; WU He-Yu; JIN Gen-Ming; ZHU Yong-Tai; LI Song-Lin; XIAO Zhi-Gang; WANG Hong-Wei; DUAN Li-Min; LI Zu-Yu; YIN Xu; WANG Su-Fang; ZHANG Bao-Guo; WEI Zhi-Yo

Chinese Physics C> 2003, Vol. 27> Issue(11) : 990-994

Isospin Effect of Charged Particle Multiplicity in Intermediate Energy Heavy Ion Collisions

Institute of Modem Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Department of Physics, The Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

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Abstract：
The dependence of He and intermediate mass fragments (IMF) production rates in the reactions 55MeV/u ⁴⁰Ar+^58,64Ni on the isospin, impact parameter and primary excitation energy of the reaction system was studied by using the 4:v charged particle multidetector array system ( MUDAL) . For the mentioned two reaction systems, the measured He particle contribution in the total charged particle multiplicity increases with increasing the total charged particle multiplicity but for the contribution of IMFs in the total charged particle multiplicity increases with increasing the total charged particle multiplicity at lower total charged particle multiplicities, and latter on it drops down with further increaseg of the total charged particle multiplicities. The experimental results of these two reaction systems with the same nuclear charge indicate that the contributions of He and IMFs in the total charged particle multiplicities are obviously isospin dependent.

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HU Rong-Jiang, WU He-Yu, JIN Gen-Ming, ZHU Yong-Tai, LI Song-Lin, XIAO Zhi-Gang, WANG Hong-Wei, DUAN Li-Min, LI Zu-Yu, YIN Xu, WANG Su-Fang, ZHANG Bao-Guo, WEI Zhi-Yo, Isospin Effect of Charged Particle Multiplicity in Intermediate Energy Heavy Ion Collisions[J]. Chinese Physics C, 2003, 27(11): 990-994.

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Received: 2003-04-08
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

Isospin Effect of Charged Particle Multiplicity in Intermediate Energy Heavy Ion Collisions

Corresponding author: HU Rong-Jiang,

Institute of Modem Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Department of Physics, The Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

Received Date: 2003-04-08

Accepted Date: 1900-01-01

Available Online: 2003-11-05

Abstract: The dependence of He and intermediate mass fragments (IMF) production rates in the reactions 55MeV/u ⁴⁰Ar+^58,64Ni on the isospin, impact parameter and primary excitation energy of the reaction system was studied by using the 4:v charged particle multidetector array system ( MUDAL) . For the mentioned two reaction systems, the measured He particle contribution in the total charged particle multiplicity increases with increasing the total charged particle multiplicity but for the contribution of IMFs in the total charged particle multiplicity increases with increasing the total charged particle multiplicity at lower total charged particle multiplicities, and latter on it drops down with further increaseg of the total charged particle multiplicities. The experimental results of these two reaction systems with the same nuclear charge indicate that the contributions of He and IMFs in the total charged particle multiplicities are obviously isospin dependent.

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Isospin Effect of Charged Particle Multiplicity in Intermediate Energy Heavy Ion Collisions

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