用光电子源检验KATRIN β谱仪能标稳定性的可行性
Feasibility of photoelectron sources for testing the energy scale stablity of the KATRIN beta-ray spectrometer
摘要：
研究了薄金属转换器中核γ射线的光吸收，目的是产生动能约为18.6 keV、自然宽度约为1 eV的单能光电子。计算了241Am（1.1GBq）和119mSn（0.5GBq）的商业光子源辐照Co和Ti转换器的效率。用两台静电能谱仪测量了不同厚度的Co转换器中241Am γ射线和X射线发射的光电子。
英文摘要：
Photoabsorption of nuclear gamma-rays in thin metallic convertors was examined with the aim to produce monoenergetic photoelectrons of kinetic energy around 18.6 keV and natural width of about 1 eV. Calculations were carried out for commercial photon sources of 241Am (1.1 GBq) and 119mSn (0.5 GBq) irradiating Co and Ti convertors. Photoelectrons ejected by 241Am gamma- and X-rays from Co convertors of various thickness were measured with two electrostatic spectrometers.
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