We examine the effect of theoretically varying the collision-system reduced mass in collisions of He with vibrationally excited molecular hydrogen and observe zero-energy resonances for select atomic "hydrogen" masses less than 1 u or a "helium" mass of 1.95 u. Complex scattering lengths, state-to-state vibrational quenching cross sections, and a low-energy elastic scattering resonance are all studied as a function of collision-system reduced mass. Experimental observations of these phenomena in the cold and ultracold regimes for collisions of He3 and He4 with H2, HD, HT, and DT should be feasible in the near future.
|Original language||English (US)|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|State||Published - 2010|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics