Abbreviated Journal Title
Phys. Rev. A
POTENTIAL-ENERGY SURFACE; DER-WAALS COMPLEX; ASTRONOMICAL; IDENTIFICATION; ROTATIONAL-EXCITATION; MUTUAL NEUTRALIZATION; NEGATIVE-IONS; COLLISIONS; IRC+10216; HYDROGEN; H-+H-2; Optics; Physics, Atomic, Molecular & Chemical
We develop the theory of radiative association of an atom and a diatomic molecule within a close-coupling framework. We apply it to the formation of H-3(-) after the low-energy collision (below 0.5 eV) of H-2 with H-. Using recently obtained potential energy and permanent dipole moment surfaces of H-3(-), we calculate the lowest rovibrational levels of the H-3(-) electronic ground state and the cross section for the formation of H-3(-) by radiative association between H- and ortho- and para-H-2. We discuss the possibility for the H-3(-) ion to be formed and observed in the cold and dense interstellar medium in an environment with a high ionization rate. Such an observation could be a probe for the presence of H- in the interstellar medium.
Physical Review A
Ayouz, M.; Lopes, R.; Raoult, M.; Dulieu, O.; and Kokoouline, Viatcheslav, "Formation of H-3(-) by radiative association of H-2 and H- in the interstellar medium" (2011). Faculty Bibliography 2010s. 7059.