Singlet Molecular Hydrogen

ThreePhoton DoubleResonance Spectroscopy of Autoionizing Rydberg States in H_{2},
N. Bjerre, R. Kachru, and H. Helm, Phys. Rev. A 31 12068 (1985)

Field Ionization of HighLying States of H_{2},
E. Y. Xu, H. Helm, and R. Kachru, Phys. Rev. Lett. 59 10969 (1987)

Forced Rotatonal Autoionization of H_{2},
E. Y. Xu, H. Helm, and R. Kachru, Phys. Rev. A 38 16669 (1988)

Autoionizing npRydberg States of H_{2}(E, F ^{1}Σ_{g }^{+},
E. Xu, H. Helm, and R. Kachru, Phys. Rev. A 39 397991 (1989)

Photoelectron Spectroscopy of Vibrationally Excited H_{2}(E, F ^{1}Σ_{g }^{+ }),
E. Xu, A. P. Hickman, R. Kachru, T. Tsuboi, and H. Helm, Phys. Rev. A 40 70318 (1989)