Photoabsorption probabilities of H2 levels lying near the H(1S) + H(n=2) dissociation limit

The transition probabilities for Hydrogen B 2pσ1Σ+u (v′=32–35)←X 1Σ+g (v″=0), C 2pπ1Πu (v′=11–13)←X (v″=0), and B′ 3pσ1Σ+u (v′=5–8)←X (v″=0) were measured using synchrotron radiation in order to investigate the variation of the transition probabilities in the region of the dissociation threshold. The experimental data which agree with calculated probabilities indicate that B′ and C state continua may be of comparable intensities.