Forward-backward emission of target evaporated fragmentsin high energy nucleus-nucleus collisions

  • The multiplicity distribution, multiplicity moment, scaled variance, entropy and reduced entropy of target evaporated fragments emitted in forward and backward hemispheres in 12 A GeV 4He, 3.7 A GeV 16O, 60 A GeV 16O, 1.7 A GeV 84Kr and 10.7 A GeV 197Au-induced emulsion heavy target (AgBr) interactions are investigated. It is found that the multiplicity distribution of target evaporated fragments emitted in both forward and backward hemispheres can be fitted by a Gaussian distribution. The multiplicity moments of target evaporated particles emitted in the forward and backward hemispheres increase with the order of the moment q, and the second-order multiplicity moment is energy independent over the entire energy range for all the interactions in the forward and backward hemisphere. The scaled variance, a direct measure of multiplicity fluctuations, is close to one for all the interactions, which indicate a correlation among the produced particles. The entropy of target evaporated fragments emitted in both forward and backward hemispheres are the same within experimental errors.
      PCAS:
  • 加载中
  • [1] Bowman J D, Swiatecki W J, Tsang C F. Abrasion and Ablation of Heavy Ions. Lawrence Berkeley Report: LBL-2908, 1973[2] Powell C F, Fowler P H, Perkins D H. The Study of Elementary Particles by the Photographic Method, Pergamon Press. London, New York: Paris, Los Angles, 1959. 432[3] Ghosh D, Deb A, Bhattacharyya S. Phys. Scr., 2011, 84: 015201[4] ZHANG Dong-Hai, CHEN Yan-Ling, WANG Guo-Rong et al. Chin. Phys. C, 2015, 39: 014001[5] Stocker H, Maruhn J A, Greiner W. Z. Phys. A, 1979, 293: 173-179[6] Koba Z, Nielsen H B, Olesen P. Nucl. Phys. B, 1972, 40: 317-334[7] Wehrl A. Rev. Mod. Phys., 1978, 50: 221-260[8] Simak V, Sumbera M, Zborovski I. Phys. Lett. B, 1988, 206: 159-162[9] Ghosh D. Roy J. Sengupta A G et al. Can. J. Phys., 1992, 70: 667-669
  • 加载中

Get Citation
ZHANG Zhi, MA Tian-Li and ZHANG Dong-Hai. Forward-backward emission of target evaporated fragmentsin high energy nucleus-nucleus collisions[J]. Chinese Physics C, 2015, 39(10): 104002. doi: 10.1088/1674-1137/39/10/104002
ZHANG Zhi, MA Tian-Li and ZHANG Dong-Hai. Forward-backward emission of target evaporated fragmentsin high energy nucleus-nucleus collisions[J]. Chinese Physics C, 2015, 39(10): 104002.  doi: 10.1088/1674-1137/39/10/104002 shu
Milestone
Received: 2015-01-05
Revised: 1900-01-01
Article Metric

Article Views(1537)
PDF Downloads(55)
Cited by(0)
Policy on re-use
To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Email This Article

Title:
Email:

Forward-backward emission of target evaporated fragmentsin high energy nucleus-nucleus collisions

    Corresponding author: ZHANG Dong-Hai,

Abstract: The multiplicity distribution, multiplicity moment, scaled variance, entropy and reduced entropy of target evaporated fragments emitted in forward and backward hemispheres in 12 A GeV 4He, 3.7 A GeV 16O, 60 A GeV 16O, 1.7 A GeV 84Kr and 10.7 A GeV 197Au-induced emulsion heavy target (AgBr) interactions are investigated. It is found that the multiplicity distribution of target evaporated fragments emitted in both forward and backward hemispheres can be fitted by a Gaussian distribution. The multiplicity moments of target evaporated particles emitted in the forward and backward hemispheres increase with the order of the moment q, and the second-order multiplicity moment is energy independent over the entire energy range for all the interactions in the forward and backward hemisphere. The scaled variance, a direct measure of multiplicity fluctuations, is close to one for all the interactions, which indicate a correlation among the produced particles. The entropy of target evaporated fragments emitted in both forward and backward hemispheres are the same within experimental errors.

    HTML

Reference (1)

目录

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return