title: Positron scattering and annihilation from the hydrogen molecule at zero energy.
abstract: The confined variational method is used to generate a basis of correlated Gaussians to describe the interaction region wave function for positron scattering from the H2 molecule. The scattering length was approximately = -2.7a(0) while the zero energy Z(eff) of 15.7 is compatible with experimental values. The variation of the scattering length and Z(eff) with internuclear distance was surprisingly rapid due to virtual state formation at R approximately = 3.4a(0).
authors.affiliation: ARC Center for Anti-Matter Studies, School of Engineering, Charles Darwin University, Darwin NT 0909, Australia.
authors.forename: J-Y
authors.initials: JY
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Mitroy
authors.forename: K
authors.initials: K
authors.lastname: Varga