α粒子激励下氦、氪的光谱

Spectra of Helium and Kryton by Alpha-Particle Impact Excitation

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370．0～720．0um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.