As metastable atoms deexcite, the vapor velocity and temperature increase, the peak value of the velocity distribution function shifts rightward, and the half width increases.
亚稳态原子消激发，使蒸气宏观速度增加，温度增加，所以使速度分布函数峰值右移，半宽度增加。
2
The peak currents for metastable pits also follow lognormal distribution and rise with potential.