The pi --> pi* and n --> 5s absorption spectra of selenoformaldehyde, CH2Se and CD2Se, are reported. Both spectra are diffuse. The pi --> pi* transition extends from 243 to 210 nm with an extensive Franck-Condon profile and intensity maximum estimated at 230 nm. The Rydberg n --> 5s transition is superimposed on the pi --> pi* system. While still diffuse, the system is less extensive and shows an intensity maximum at 235 nm. The corresponding Rydberg transition of the deuterated species is blue shifted by 140 cm-1. Copyright 1999 Academic Press.

中文翻译：

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硒甲醛 CH2Se 高电子跃迁的研究

报告了硒甲醛、CH2Se 和 CD2Se 的 pi --> pi* 和 n --> 5s 吸收光谱。两个光谱都是漫射的。pi --> pi* 跃迁从 243 纳米延伸到 210 纳米，具有广泛的弗兰克-康登轮廓和估计在 230 纳米的强度最大值。Rydberg n --> 5s 跃迁叠加在 pi --> pi* 系统上。虽然仍然是漫射的，但系统的范围较小，并且在 235 nm 处显示强度最大值。氘代物质的相应里德堡跃迁蓝移了 140 cm-1。版权所有 1999 学术出版社。