Observation of neutron spectrum produced by fast deuterons via ultraintense laser plasma interactions.
Observation of neutron spectrum produced by fast deuterons via ultraintense laser plasma interactions.
复制标题
DOI：
10.1103/physreve.65.036413
复制
发表时间：
2002-03
期刊：
影响因子：
--
通讯作者：
N. Izumi;Y. Sentoku;H. Habara;K. Takahashi;F. Ohtani;T. Sonomoto;R. Kodama;T. Norimatsu;H. Fujita;Y. Kitagawa;K. Mima;K. Tanaka;T. Yamanaka
中科院分区：
文献类型：
--
作者：
N. Izumi;Y. Sentoku;H. Habara;K. Takahashi;F. Ohtani;T. Sonomoto;R. Kodama;T. Norimatsu;H. Fujita;Y. Kitagawa;K. Mima;K. Tanaka;T. Yamanaka
本文报道了亚皮秒激光脉冲辐照氘代塑料靶产生快中子的首次精确光谱测量。将500 fs、50 J、1054 nm激光脉冲聚焦在氘代聚苯乙烯靶上，强度为2 x 10（19）W/cm（2）。在与后靶法线成55度和90度角处观察中子谱。每个探测器的中子发射为7 × 10（4）/球面度。中子能谱的观测结果证实了氘加速和中子产生的d（d，n）3 He反应的目标。将中子能谱与蒙特卡罗模拟结果进行了比较，研究了氘的方向各向异性和能谱。我们的结论是，2%的激光能量被转换为氘，其具有30 keV至3 MeV的能量范围。
We report the first precise spectral measurement of fast neutrons produced in a deuterated plastic target irradiated by an ultraintense sub-picosecond laser pulse. The 500-fs, 50-J, 1054-nm laser pulse was focused on the deuterated polystyrene target with an intensity of 2 x 10(19) W/cm(2). The neutron spectra were observed at 55 degrees and 90 degrees to the rear target normal. The neutron emission was 7 x 10(4) per steradian for each detector. The observed neutron spectra prove the acceleration of deuterons and neutron production by d(d,n)3He reactions in the target. The neutron spectra were compared with Monte Carlo simulation results and the deuteron's directional anisotropy and energy spectrum were studied. We conclude that 2% of the laser energy was converted to deuterons, which has an energy range of 30 keV up to 3 MeV.