Chinese Physics C > 2014, Vol. 38 > Issue(7): 074001 DOI: 10.1088/1674-1137/38/7/074001

Multiplicity fluctuation analysis of target residues in nucleus-emulsion collisions at a few hundred MeV/nucleon

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Multiplicity fluctuation of the target evaporated fragments emitted in 290 MeV/u ¹²C-AgBr, 400 MeV/u ¹²C-AgBr, 400 MeV/u ²⁰Ne-AgBr and 500 MeV/u ⁵⁶Fe-AgBr interactions is investigated using the scaled factorial moment method in two-dimensional normal phase space and cumulative variable space, respectively. It is found that in normal phase space the scaled factorial moment (ln< F _q>) increases linearly with the increase of the divided number of phase space (ln M) for lower q-value and increases linearly with the increase of ln M, and then becomes saturated or decreased for a higher q-value. In cumulative variable space ln< F _q> decreases linearly with increase of ln M. This indicates that no evidence of non-statistical multiplicity fluctuation is observed in our data sets. So, any fluctuation indicated in the results of normal variable space analysis is totally caused by the non-uniformity of the single-particle density distribution.

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ZHANG Dong-Hai, CHEN Yan-Ling, WANG Guo-Rong, LI Wang-Dong, WANG Qing, YAO Ji-Jie, ZHOU Jian-Guo, ZHENG Su-Hua, XU Li-Ling, MIAO Hui-Feng and WANG Peng. Multiplicity fluctuation analysis of target residues in nucleus-emulsion collisions at a few hundred MeV/nucleon[J]. Chinese Physics C, 2014, 38(7): 074001. doi: 10.1088/1674-1137/38/7/074001

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Received: 2013-08-19
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

Multiplicity fluctuation analysis of target residues in nucleus-emulsion collisions at a few hundred MeV/nucleon

Corresponding author:ZHANG Dong-Hai,

Received Date:2013-08-19

Accepted Date:1900-01-01

Available Online:2014-07-05

Abstract:Multiplicity fluctuation of the target evaporated fragments emitted in 290 MeV/u¹²C-AgBr, 400 MeV/u¹²C-AgBr, 400 MeV/u²⁰Ne-AgBr and 500 MeV/u⁵⁶Fe-AgBr interactions is investigated using the scaled factorial moment method in two-dimensional normal phase space and cumulative variable space, respectively. It is found that in normal phase space the scaled factorial moment (ln<F_q>) increases linearly with the increase of the divided number of phase space (lnM) for lowerq-value and increases linearly with the increase of lnM, and then becomes saturated or decreased for a higherq-value. In cumulative variable space ln<F_q> decreases linearly with increase of lnM. This indicates that no evidence of non-statistical multiplicity fluctuation is observed in our data sets. So, any fluctuation indicated in the results of normal variable space analysis is totally caused by the non-uniformity of the single-particle density distribution.

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Multiplicity fluctuation analysis of target residues in nucleus-emulsion collisions at a few hundred MeV/nucleon

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