Hoshino Shoma, Ishiwata Takashi, Nakano Yukio, Fukushima Masaru, Fujiwara Hisashi, Araki Mitsunori, Tsukiyama Koichi
Department of Chemistry, Faculty of Science Division I, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan.
Faculty of Information Sciences, Hiroshima City University, 3-4-1 Ozukahigashi, Asaminami, Hiroshima 731-3194, Japan.
J Phys Chem A. 2019 Sep 5;123(35):7590-7596. doi: 10.1021/acs.jpca.9b06451. Epub 2019 Aug 22.
In this paper, we describe amplified spontaneous emission (ASE) from the ' 0 () ion-pair state of I populated through a two-step laser excitation technique via the Π(0) valence state. The intense infrared emission propagating in the direction of the incident laser beam is assigned to the ASE transition from the ' 0 () state to the ' 0 () ion-pair state. The subsequent ultraviolet fluorescence transition from the ' 0 () state to the 0 () state as well as the 0 () state is also reported. By Franck-Condon simulation of the cascading ' 0 () → 0 () band, we determine the population distributions in the ' 0 () state generated by ASE, which are consistent with the intensity profile of the mid-infrared ASE spectrum. Finally, employing these vibrational distributions for the ' 0 () state, spectral parameters for the shallow 0 () state are derived.
在本文中，我们描述了通过两步激光激发技术经由Π(0)价态对碘的 '0 ()离子对态进行激发而产生的放大自发辐射（ASE）。沿入射激光束方向传播的强烈红外发射被归因于从 '0 ()态到 '0 ()离子对态的ASE跃迁。还报道了随后从 '0 ()态到0 ()态以及0 ()态的紫外荧光跃迁。通过对级联的 '0 () → 0 ()能带进行弗兰克 - 康登模拟，我们确定了由ASE产生的 '0 ()态中的布居分布，这与中红外ASE光谱的强度分布一致。最后，利用这些 '0 ()态的振动分布，推导出了浅0 ()态的光谱参数。
