中国物理B ›› 2008, Vol. 17 ›› Issue (4): 1237-1241.doi: 10.1088/1674-1056/17/4/015

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Coulomb expansion of deuterated methane clusters irradiated by an ultrashort intense laser pulse

李洪玉, 刘建胜, 王成, 倪国权, 李儒新, 徐至展   

  1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2007-07-13 修回日期:2007-10-19 出版日期:2008-04-20 发布日期:2008-04-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10535070 and 10674145), the National Basic Research Program of China (Grant No 2006CB806000), and the Shanghai Supercomputer Center (SSC).

Coulomb expansion of deuterated methane clusters irradiated by an ultrashort intense laser pulse

Li Hong-Yu(李洪玉)†, Liu Jian-Sheng(刘建胜), Wang Cheng(王成), Ni Guo-Quan(倪国权), Li Ru-Xin(李儒新), and Xu Zhi-Zhan(徐至展)   

  1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2007-07-13 Revised:2007-10-19 Online:2008-04-20 Published:2008-04-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10535070 and 10674145), the National Basic Research Program of China (Grant No 2006CB806000), and the Shanghai Supercomputer Center (SSC).

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摘要： The simulations of three-dimensional particle dynamics show that when irradiated by an ultrashort intense laser pulse, the deuterated methane cluster expands and the majority of deuterons overrun the more slowly expanding carbon ions, resulting in the creation of two separated subclusters. The enhanced deuteron kinetic energy and a narrow peak around the energy maximum in the deuteron energy distribution make a considerable contribution to the efficiency of nuclear fusion compared with the case of homonuclear deuterium clusters. With the intense laser irradiation, the nuclear fusion yield increases with the increase of the cluster size, so that deuterated heteronuclear clusters with larger sizes are required to achieve a greater neutron yield.

Abstract: The simulations of three-dimensional particle dynamics show that when irradiated by an ultrashort intense laser pulse, the deuterated methane cluster expands and the majority of deuterons overrun the more slowly expanding carbon ions, resulting in the creation of two separated subclusters. The enhanced deuteron kinetic energy and a narrow peak around the energy maximum in the deuteron energy distribution make a considerable contribution to the efficiency of nuclear fusion compared with the case of homonuclear deuterium clusters. With the intense laser irradiation, the nuclear fusion yield increases with the increase of the cluster size, so that deuterated heteronuclear clusters with larger sizes are required to achieve a greater neutron yield.

Key words: deuterated methane cluster, ultrashort intense laser pulse, Coulomb explosion, nuclear fusion

中图分类号:  (Reactivity of clusters)

  • 36.40.Jn
36.40.Sx (Diffusion and dynamics of clusters) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 61.80.Ba (Ultraviolet, visible, and infrared radiation effects (including laser radiation))