National Institute for Laser, Plasma and Radiation Physics, Center for Advanced Laser Technologies, Magurele, RO-077125, Romania.
"Horia Hulubei" National Institute of Physics and Nuclear Engineering, RO-077125, Magurele, Romania.
Sci Rep. 2017 Jan 9;7:40209. doi: 10.1038/srep40209.
The paper is the first comprehensive study on alpha particle irradiation effects on four mid-IR materials: CaF, BaF, AlO (sapphire) and ZnSe. The measurements of the optical spectral transmittance, spectral diffuse reflectance, radioluminescent emission, terahertz (THz) spectral response, transmittance, absorbance, refractive index, real and imaginary parts of the dielectric constant and THz imaging are used as complementary investigations to evaluate these effects. The simulations were run to estimate: (i) the penetration depth, (ii) the scattering of alpha particle beam, (iii) the amount of material affected by this interaction, and (iv) the number of vacancies produced by the radiation exposure for each type of material. The simulation results are compared to the off-line measurement outcomes. The delay and spectral composition change of the reflected THz signal highlight the modification induced in the tested materials by the irradiation process.
本文是首次全面研究α粒子辐照对四种中红外材料的影响：CaF、BaF、AlO（蓝宝石）和 ZnSe。采用光学光谱透射率、光谱漫反射率、发光辐射、太赫兹（THz）光谱响应、透射率、吸收率、折射率、介电常数实部和虚部以及 THz 成像等测量方法作为补充研究，以评估这些影响。进行了模拟以估计：（i）穿透深度，（ii）α粒子束的散射，（iii）受这种相互作用影响的材料量，以及（iv）每种材料辐射暴露产生的空位数量。将模拟结果与离线测量结果进行了比较。反射太赫兹信号的延迟和光谱组成变化突出了辐照过程在测试材料中引起的变化。
