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首页> 外文期刊>Physical review, E. Statistical physics, plasmas, fluids, and related interdisciplinary topics >Observation of neutron spectrum produced by fast deuterons via ultraintense laser plasma interactions - art. no. 036413
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Observation of neutron spectrum produced by fast deuterons via ultraintense laser plasma interactions - art. no. 036413

机译：快速氘核通过超强激光等离子体相互作用产生的中子光谱的观察-艺术。没有。 036413

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摘要

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 x10(19) W/cm(2). The neutron spectra were observed at 55degrees and 90degrees 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) He-3 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. [References: 42]
机译：我们报告了由超强亚皮秒激光脉冲辐射的氘化塑料靶中产生的快速中子的首次精确光谱测量。将500 fs，50 J，1054 nm的激光脉冲聚焦在氘化的聚苯乙烯靶上，强度为2 x10（19）W / cm（2）。在与后目标法线成55度和90度处观察到中子光谱。每个探测器的中子发射为每个球面度7 x 10（4）。观察到的中子光谱证明了目标中d（d，n）He-3反应的氘核加速和中子产生。将中子光谱与蒙特卡罗模拟结果进行了比较，研究了氘核的方向各向异性和能谱。我们得出的结论是2％的激光能量被转换为氘核，氘核的能量范围为30 keV到3 MeV。 [参考：42]

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