本文利用T-矩法和累积变量法,对290 A MeV^(12)C诱发乳胶核反应,重靶核蒸发碎片在二维相空间cosθ-中的非统计涨落进行了研究.结果表明,ln<n^q>随ln<n>的增加均表现出增加的趋势,说明在^(12)C-Ag Br作用的过程中,其靶核...本文利用T-矩法和累积变量法,对290 A MeV^(12)C诱发乳胶核反应,重靶核蒸发碎片在二维相空间cosθ-中的非统计涨落进行了研究.结果表明,ln<n^q>随ln<n>的增加均表现出增加的趋势,说明在^(12)C-Ag Br作用的过程中,其靶核蒸发碎片的发射过程存在一定的非统计涨落.展开更多
Multiplicity fluctuation of the target residues emitted in the interactions in a wide range of projectile energies from 500 A MeV to 60 A GeV is investigated in the framework of two-dimensional scaled factorial moment...Multiplicity fluctuation of the target residues emitted in the interactions in a wide range of projectile energies from 500 A MeV to 60 A GeV is investigated in the framework of two-dimensional scaled factorial moment methodology. The evidence of non-statistical multiplicity fluctuation is found in 160-AgBr collisions at 60 A GeV, but not in 56Fe-AgBr collisions at 500 A MeV, 84Kr-AgBr collisions at 1.7 A GeV, 16O-AgBr collisions at 3.7 A GeV and 197Au-AgBr collisions at 10.7 A GeV.展开更多
Self-affine multiplicity fluctuation is investigated by using the two-dimensional factorial moment methodology and the concept of the Hurst exponent （H）. Investigation on the experimental data of compound particles ...Self-affine multiplicity fluctuation is investigated by using the two-dimensional factorial moment methodology and the concept of the Hurst exponent （H）. Investigation on the experimental data of compound particles and target fragments emitted in ^84Kr-AgBr interactions at 1.7 A GeV reveals that the best power law behaviours are exhibited at H=0.7 and 0.6 respectively, and the data for shower particles produced in ^84Kr-emulsion interactions at 1.7 A GeV indicate that the best power law behaviour occurs at H=0.6, all of which show the self-affine multiplicity fluctuation patterns. The multifractality and the non-thermal phase transition occurring during producing the compound particles, the target fragments, and the shower particles in the ^84Kr -AgBr interaction and the ^84Kr-emulsion interaction are also discussed. The multifractality is observed during producing compound particles, target fragments, and shower particles. In the target fragment production, an evidence of non-thermal phase transition is observed, but in the shower particle production and the compound particle production, no evidence of non-thermal phase transition is observed.展开更多
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...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.展开更多
本论文用标度阶乘矩的方法对150 A MeV ~4He-Em作用靶核碎片在一维相空间和二维相空间的非统计涨落进行了分析.通过对一维相空间阶乘矩和二维相空间阶乘矩的分析,得出150 A MeV ~4HeEm作用靶核碎片在发射过程中没有间歇性行为,即不存在...本论文用标度阶乘矩的方法对150 A MeV ~4He-Em作用靶核碎片在一维相空间和二维相空间的非统计涨落进行了分析.通过对一维相空间阶乘矩和二维相空间阶乘矩的分析,得出150 A MeV ~4HeEm作用靶核碎片在发射过程中没有间歇性行为,即不存在非统计涨落.展开更多
基金supported by the National Natural Science Foundation of China(Grant No. 10475054)the Natural Science Foundation of Shanxi Province,China(Grant No. 2008011005)the Shanxi Provincial Foundation for Returned Scholars of China
文摘Multiplicity fluctuation of the target residues emitted in the interactions in a wide range of projectile energies from 500 A MeV to 60 A GeV is investigated in the framework of two-dimensional scaled factorial moment methodology. The evidence of non-statistical multiplicity fluctuation is found in 160-AgBr collisions at 60 A GeV, but not in 56Fe-AgBr collisions at 500 A MeV, 84Kr-AgBr collisions at 1.7 A GeV, 16O-AgBr collisions at 3.7 A GeV and 197Au-AgBr collisions at 10.7 A GeV.
基金supported by the National Natural Science Foundation of China (Grant Nos 10475054 and 10675077)the Research Foundation of Ministry of Education of China (Grant No 205026)+1 种基金the Natural Foundation of Shanxi Province, China (Grant No2008011005)Shanxi Provincial Foundation for Returned Scholars, China (Grant No 20031046)
文摘Self-affine multiplicity fluctuation is investigated by using the two-dimensional factorial moment methodology and the concept of the Hurst exponent （H）. Investigation on the experimental data of compound particles and target fragments emitted in ^84Kr-AgBr interactions at 1.7 A GeV reveals that the best power law behaviours are exhibited at H=0.7 and 0.6 respectively, and the data for shower particles produced in ^84Kr-emulsion interactions at 1.7 A GeV indicate that the best power law behaviour occurs at H=0.6, all of which show the self-affine multiplicity fluctuation patterns. The multifractality and the non-thermal phase transition occurring during producing the compound particles, the target fragments, and the shower particles in the ^84Kr -AgBr interaction and the ^84Kr-emulsion interaction are also discussed. The multifractality is observed during producing compound particles, target fragments, and shower particles. In the target fragment production, an evidence of non-thermal phase transition is observed, but in the shower particle production and the compound particle production, no evidence of non-thermal phase transition is observed.
基金Supported by National Science Foundation of China(11075100),Natural Science Foundation of Shanxi Province,China(20110110012)Shanxi Provincial Foundation for Returned Overseas Chinese Scholars,China(2011-058)
文摘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.
