抄録
O2 is one of the most important chemical species in every field of natural science. In the present study, a state-selected triplet molecular oxygen beam, in which nearly 100% of the molecules are in the spin-rotational state of (J, M)=(2, 2), has been produced by combining a supersonic seeded O2 beam with a hexapole magnet. The (2, −2) beam with >90% purity has also been obtained by a controlled non-adiabatic transition. The (2, ±2) beam, for which we can determine the spin and rotational angular momenta of O2 almost independently, is the most promising probe for studying the spin effects as well as the steric effects in O2 molecular scattering.
