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 emission spectra of helium and krypton under α-particle excitation were measured by a self-made single-photon counting device. Five Hel, one KrI and six KrII spectral lines were identified in the wavelength range from 370.0 to 720.0um , And the helium molecular band was observed under the excitation of α particle. The variation of spectral line intensity with the gas pressure was experimentally studied, and the possible excitation mechanism of helium and krypton under α-particle excitation was discussed.