真空紫外領域における高分解H_2スペクトルの研究 : 3pπD^1Π_u-X^1Σ^+_g吸収帯の線の拡り

概要

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The diffuse profiles of P and R lines in the D-X system of H_2 are investigated in connection with the other electronic states interacting with the D state by high resolution spectroscopy. Previously it has been widely claimed that the predlssociation of the Π^+ substate of Spπ D^1Π_u occurs at the v=3 level and above. The dissociating energies of the 2pσ B ^1Σ_u^+, 3pσ B' ^1Σ_u^+, and 2pπ C^1Π_u states H(1s)+H(2s, 2p) correspond to those between the v=2 and 3 levels of the D state. Among of them the state, mostly responsible to the predissociation, is considered to be the B' state. The theoretically calculated potentials of the B' and D states assert the slightly decreased interactions with the growing v' at the J=1 levels of D for v=3-12. It is much preferable for the examination of the theoretical prediction to study the line profiles with high J. So far the investigation about D-X has been limited mostly to R(0) and R(1). We focus the study on the R(J) lines with J=2 and 3 for v'≧6. Consequently, the slightly increased line widths with the growing v' are found against the theoretical prediction.
群馬大学の論文
1989-03-31