Multiplicity fluctuation analysis of target residues in nucleusemulsion collisions at a few hundred MeV/nucleon

• Published in: 中国物理C：英文版 no. 7; pp. 14 - 17
• Main Author: 张东海 陈艳玲 王国蓉 李王东 王青 姚继杰 周建国 郑素华 胥利玲 苗慧锋 王鹏
• Format: Journal Article
• Language: English
• Published: 2014
• Subjects: 乳液; 变量空间; 多重性; 标度阶乘矩; 核子; 波动分析; 溴化银; 电子
• ISSN: 1674-1137; 0254-3052
• DOI: 10.1088/1674-1137/38/7/074001

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.