Observation of Nonobligatory Potential Structure in a Collision of the Second Kind

Abstract

Low-energy structure in the total He $2^{3}S-\mathrm{Ne} 4s^{\prime }\left[\frac{1}{2}\right]_1^{}{}_{}{}^0$, $4s^{\prime }\left[\frac{1}{2}\right]_0^{}{}_{}{}^0$ transfer cross section has been extracted from temperature-dependent pulsed-afterglow measurements. The results confirm the existence of a nonobligatory potential barrier in an exothermic atomatom transfer collision.