Water structured Rydberg absorptions

The absorption spectrum of water in the vacuum ultraviolet has been studied by Johns (533) and by Bell (92). Sharp rotational structure has been observed only below 1240 A (533). The 1240 A bands have been assigned to the 1 Bx —, 4, transition and is the lirst member of the Rydberg scries. The absorption coefficients of water in the vacuum ultraviolet have been measured by Watanabe ct al. (1016, 1018) and arc shown in Fig. VI I. The absorption coefficients of D2C) have been measured by Laufcr and McNesby in the region 1300 to 1800 A (601). 

---