论文标题
通过γ-光子闪光灯辐射高Z靶标在$λ^3 $ rengime中产生的γ-光子闪光灯，通过γ-光子闪光照射高Z靶标，并产生放射性核。
Electron-positron pairs and radioactive nuclei production by irradiation of high-Z target with γ-photon flash generated by an ultra-intense laser in the $λ^3$ regime
论文作者
论文摘要
本文通过蒙特卡洛模拟研究了激光驱动的$γ$ - 光子和高能量带电粒子的相互作用。相互作用的粒子取自密切聚焦超轻激光脉冲与钛靶的相互作用的粒子模拟。由于其巨型偶极子共振和电子旋律对产生的高横截面的高横截面，因此选择铅作为次级高Z目标。结果揭示了超短相关的准正电子群体及其能量光谱，角度分布和时间谱。我们研究了由激光生成的$γ$ photons和带电粒子分别从铅靶标发出的各种粒子物种的总数和总动能的目标厚度依赖性。我们绘制了通过铅靶的照射产生的残留高Z核素的图表。由于脉冲持续时间短，$γ$ - photon，电子峰值和中子来源可以在材料科学，核物理学，实验室天体物理学以及基于激光的带电颗粒的加速器中找到应用。
This paper studies the interaction of laser-driven $γ$-photons and high energy charged particles with high-Z targets through Monte-Carlo simulations. The interacting particles are taken from particle-in-cell simulations of the interaction of a tightly-focused ultraintense laser pulse with a titanium target. Lead is chosen as the secondary high-Z target owing to its high cross section of the giant dipole resonance and electron-positron pair production. The results reveal an ultra-short ultra-relativistic collimated positron population and their energy spectra, angular distribution, and temporal profile are found. We investigate the target thickness dependence of the resulting total numbers and total kinetic energies of various particle species emitted from the lead target irradiated with laser-generated $γ$-photons and charged particles separately. We plot the charts of residual high-Z nuclides generated by irradiation of the lead target. Owing to the short pulse duration, the $γ$-photon, electron-positron, and neutron sources can find applications in material science, nuclear physics, laboratory astrophysics, and as injectors in laser-based accelerators of charged particles.
