氘代乙烷团簇库仑爆炸产生高能氘核和中子的研究

采用简化库仑爆炸模型对强激光脉冲照射氘代乙烷团簇发生的库仑爆炸过程进行数值模拟,研究了氘代乙烷团簇爆炸产生的氘核动能、中子产额与团簇尺寸的关系,且与氘代甲烷团簇产生的氘核动能及中子产额进行了比较.研究表明,尺寸为5 nm的氘代乙烷团簇在发生库仑爆炸后氘核的最大动能为20.96 keV,获得的中子产额为6.31×105,比同尺寸氘代甲烷团簇产生的氘核最大动能及中子产额更大.因此相对于氘代甲烷团簇,大尺寸的氘代乙烷团簇更适合作为激光驱动团簇库仑爆炸获得高额中子的靶材,这与报道的实验推论相一致.

Generations of energetic deuterons and neutrons from the Coulomb explosion of deuterated ethane clusters

The explosion dynamics of deuterated ethane clusters driven by an intense laser pulse is simulated numerically by employing a simplified Coulomb explosion model. The dependences of deuteron kinetic energy and neutron yield on cluster size are investigated respectively in the paper. It is found that the deuteron energy and neutron yield produced from 5.0 nm deuterated ethane clusters are 20.96 keV and 6.31×10⁵ respectively, which are higher than those from 5.0 nm deuterated methane clusters. So it can be inferred that deuterated ethane clusters are superior to deuterated methane clusters as the target for the efficient laser-induced nuclear fusion reaction to achieve a higher neutron yield, which is in accordance with the reported experimental conclusion.
Keywords： deuterated ethane clusters Coulomb explosion deuteron kinetic energy neutron yield