利用自制的单光子计数装置,测定了氦、氪在α粒子激励下的发射光谱,在370.0～720.0 μm波长范围内,辨认出5条Hel,1条KrⅠ和6条KrⅡ的光谱线,并在α粒子激励下观察到氦的分子谱带。实验研究了谱线强度随气体压强的变化规律,对α粒子激励下氦、氪可能的激发机理进行了探讨。

The spectra of helium and kryton excited by alpha-particles (~ 5. 5 MeV) emitted from 238Pu have been measured using a home- made single- photon counting system. Thirteen spectral lines of helium between 370.0~720. 0 nm are identified, five lines of them belong to HeI's spectra, the others are the vibronic spectra of helium moleculars ; and seven spectral lines of kryton between 400.0~600.0 nm are observed. The spectral intensity varied with gas pressure have been given for He and Kr, respectively. The possible atomic and molecular processes by alpha-particles impaction are discussed.