Broad-range neutron spectra identification in ultraintense laser interactions with carbon-deuterated plasma
Broad-range neutron spectra identification in ultraintense laser interactions with carbon-deuterated plasma
复制标题
DOI：
10.1063/1.2131847
复制
发表时间：
2005-11
影响因子：
2.2
通讯作者：
A. Youssef;R. Kodama;H. Habara;K. Tanaka;Y. Sentoku;M. Tampo;Y. Toyama
中科院分区：
文献类型：
--
作者：
A. Youssef;R. Kodama;H. Habara;K. Tanaka;Y. Sentoku;M. Tampo;Y. Toyama
本文研究了能量为3×10~(18)W/cm~2的450fS、20J、1053 nm激光辐照CD2靶产生的详细中子能谱。从两个不同的角度观测到了大范围的中子谱，分别相对于后部靶法线成20°和70°。实验和用三维蒙特卡罗程序数值计算的光谱表明，测量的光谱范围比D(d，n)HE3反应产生的光谱范围大。通过考虑C12(d，n)N13和D(C12，n)N13反应，给出了对测量光谱的解释。此外，研究还发现，D-C和C-D反应产生的中子谱可以与D-D反应产生的中子谱重叠，并且由于它们的截面较大，与D-D反应相比，它们都有效地参与了中子产额。
Detailed neutron energy spectra produced from a CD2 target irradiated by a 450fs, 20J, 1053nm laser at an intensity of 3×1018W∕cm2 have been studied. Wide-ranging neutron spectra were observed from two different observation angles 20° and 70° relative to the rear-side target normal. The experiment and numerically calculated spectra, by a three-dimensional Monte Carlo code, indicate that the range of the measured spectra is larger than that produced by the D(d,n)He3 reaction. An interpretation for the measured spectra is introduced by considering the C12(d,n)N13 and D(c12,n)N13 reactions. In addition, the study revealed that the neutron spectra produced by the D–C and C–D reactions can overlap that produced by the D–D reaction, and due to their high cross sections, comparing to the D–D reaction, both of them effectively participate in the neutron yield.