We have employed a laser resonance method to study the interactions of individual states of metastable antiprotonic atomcules p̄He+ with surrounding H2 molecules. We have found that the lifetimes of the (n,l) = (37,34) and (39,35) states are shortened by small admixtures of H2 molecules in quite different ways; the observed quenching cross section for the upper (39,35) state in helium medium at 1 bar and 30 K is (2.4 ± 1.0) × 10-15 cm2, a factor of 24 larger than that for the lower (37,34) state.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry