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

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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
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 shu
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Received: 2013-08-19
Revised: 1900-01-01
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Multiplicity fluctuation analysis of target residues in nucleus-emulsion collisions at a few hundred MeV/nucleon

    Corresponding author: ZHANG Dong-Hai,

Abstract: 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<Fq>) increases linearly with the increase of the divided number of phase space (lnM) for lower q-value and increases linearly with the increase of lnM, and then becomes saturated or decreased for a higher q-value. In cumulative variable space ln<Fq> 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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