Superheavy Fragments Produced in the Asymmetric Strongly Damped Collision

  • The strongly damped collisions of very heavy nuclei 232Th+250Cf at energy range of 800-2000 MeV have been studied within the improved quantum molecular dynamics model. The production probability of primary superheavy fragments with Z greater than and equal to 114 for the asymmetric reaction 232Th+250Cf is higher than that for the symmetric reaction 244Pu+244Pu and 238U+238U. The calculated results show that the mass and charge distributions of primary fragments, the excitation energy distribution of SHFs depend on incident energies strongly. Two stages of the decay process of composite systems are distinguished by very different decay slopes , which imply different decay mechanism of the composite system. The first stage is for the decay of giant composite systems and the second one is corresponding to the decay of fragments of giant composite systems including SHFs through emitting neutron, proton or other charged particles, and also through fission or fragmentation. The slow reduction of SHFs in the second stage seems to be helpful for the survival of primary superheavy fragments
  • 加载中
  • [1] . Oganessian Y T, Utyonkov V K, Lobanov Y V et al. Phys.Rev., 2006, C74: 0446022. Hofmann S, Munzenberg G Rev. Mod. Phys., 2000, 72: 7333. FENG Zhao-Qing, JIN Gen-Ming, FU Fen et al. Nucl.Phys., 2006, A771: 504. LI Wen-Fei, WANG Nan, JIA Fei et al. J. Phys. G: Nucl. Part. Phys., 2006, 32: 11435. Oganessian Y T, Utyonkov V K, Lobanov Y V et al. Phys. Rev., 2004, C70: 0646096. Gggeler H, Trautmann N, Brüchle W el al. Phys. Rev. Lett., 1980, 45: 18247. Hildenbrand K D, Freiesleben H, Pühlhofer F et al. Phys. Rev. Lett., 1977, 39: 10658. Schdel M, Kratz J V, Ahrens H et al. Phys. Rev. Lett.,1978, 41: 469; Schdel M, Brüchle W, Gggeler H et al.Phys. Rev. Lett., 1982, 48: 8529. Günter Herrmann. Nature, 1979, 280: 54310. WANG N, LI Z X, WU X Z et al. Mor. Phys. Lett., 2005,A20: 111. WANG N, LI Z X, WU X Z. Phys. Rev., 2002, C65: 06460812. WANG N, WU X Z, LI Z X. Phys. Rev., 2003, C67: 02460413. WANG N, LI Z X, WU X Z et al. Phys. Rev., 2004, C69:03460814. Slater J C. Phys. Rev., 1951, 81: 8515. Titin-Schnaider C, Quentin P. Phys. Lett., 1974, B49: 39716. Bartel J, Bencheikh K. Eur. Phys. J., 2002, A14: 17917. Papa M, Maruyama T, Bonasera A. Phys. Rev., 2001, C64:02461218. Aichelin J. Phys. Rep., 1991, 202: 23319. Moller P, Nix J R, Myers W D et al. Atomic Data Nucl.Data, 1995, 59: 185
  • 加载中

Get Citation
Jun-Long Tian, WU Xi-Zhen, LI Zhu-Xia and ZHAO Kai. Superheavy Fragments Produced in the Asymmetric Strongly Damped Collision[J]. Chinese Physics C, 2008, 32(1): 34-39. doi: 10.1088/1674-1137/32/1/008
Jun-Long Tian, WU Xi-Zhen, LI Zhu-Xia and ZHAO Kai. Superheavy Fragments Produced in the Asymmetric Strongly Damped Collision[J]. Chinese Physics C, 2008, 32(1): 34-39.  doi: 10.1088/1674-1137/32/1/008 shu
Milestone
Received: 2007-02-25
Revised: 2007-05-29
Article Metric

Article Views(2399)
PDF Downloads(602)
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:

Superheavy Fragments Produced in the Asymmetric Strongly Damped Collision

    Corresponding author: Jun-Long Tian,

Abstract: The strongly damped collisions of very heavy nuclei 232Th+250Cf at energy range of 800-2000 MeV have been studied within the improved quantum molecular dynamics model. The production probability of primary superheavy fragments with Z greater than and equal to 114 for the asymmetric reaction 232Th+250Cf is higher than that for the symmetric reaction 244Pu+244Pu and 238U+238U. The calculated results show that the mass and charge distributions of primary fragments, the excitation energy distribution of SHFs depend on incident energies strongly. Two stages of the decay process of composite systems are distinguished by very different decay slopes , which imply different decay mechanism of the composite system. The first stage is for the decay of giant composite systems and the second one is corresponding to the decay of fragments of giant composite systems including SHFs through emitting neutron, proton or other charged particles, and also through fission or fragmentation. The slow reduction of SHFs in the second stage seems to be helpful for the survival of primary superheavy fragments

    HTML

Reference (1)

目录

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return