Behavior of molecular hydrogen exposed to strong dc, ac, or low-frequency laser fields. I. Bond softening and enhanced ionization

摘要: A three-dimensional, fully correlated ab initio method for calculating the ionization rates and Stark shifts of molecular hydrogen oriented parallel to an external electric or low-frequency electromagnetic field is presented. With its aid, occurrence bond softening enhanced in H{sub 2} investigated. Based on a simple quantum-mechanical explanation those effects, their also predicted any neutral covalently bound molecule. The results are used investigate applicability simpler numerical models predicting phenomena larger molecules.