中国物理B ›› 2009, Vol. 18 ›› Issue (2): 537-541.doi: 10.1088/1674-1056/18/2/025
Kim Cheol-Jung1, 卢海洋2, 王成2, 陈光龙2, 刘建胜2, 倪国权2, 李儒新2, 徐至展2
Lu Hai-Yang(卢海洋)a), Wang Cheng(王成)a), Chen Guang-Long(陈光龙)a), Kim Cheol-Jungb), Liu Jian-Sheng(刘建胜)a), Ni Guo-Quan(倪国权)a)†, Li Ru-Xin(李儒新)a)‡, and Xu Zhi-Zhan(徐至展)a)
摘要: This paper reports that Coulomb explosions taken place in the experiment of heteronuclear deuterated methane clusters ((CD4)2) in a gas jet subjected to intense femtosecond laser pulses (170mJ, 70fs) have led to table-top laser driven DD nuclear fusion. The clusters produced in supersonic expansion had an average size of about 5nm in radius and the laser intensity used was 3×1017W/cm2.The measured maximum and average energies of deuterons produced in the laser--cluster interaction were 60 and 13.5keV, respectively. From DD collisions of energetic deuterons, a yield of 2.5(±0.4)×104 fusion neutrons of 2.45MeV per shot was realized, giving rise to a neutron production efficiency of about 1.5×105 per joule of incident laser pulse energy. Theoretical calculations were performed and a fairly good agreement of the calculated neutron yield with that obtained from the present experiment was found.
中图分类号: (Fusion reactions)