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- W2279226493 abstract "The radiative decay of excited CH/sup -/ trapped in a radio frequency ion trap was measured, and the total excited state population was probed by observing the depletion of trapped CH/sup -/ caused by photodetachment at 1.16 eV, below the expected electron affinity for the ground /sup 3/..sigma../sup -/ state. The signal decayed biexponentially with time. We assigned the long lived state (lifetime 5.9+0.8, -0.6 s) as the metastable a-italic /sup 1/..delta.. state previously identified in the photoelectron spectrum. The fast decay, with a lifetime of 1.75 +- 0.15 ms, was attributed to the first excited vibrational level of the ground /sup 3/..sigma../sup -/ state, in good agreement with a theoretical result by Manz, Zilch, Rosmus, and Werner. These results support the electron affinity of 1.238 eV for CH/sup -/ obtained by Kasdan, Herbst, and Lineberger from photoelectron spectroscopy, and contradict the value of 0.74 eV determined by Feldmann from photodetachment spectroscopy." @default.
- W2279226493 created "2016-06-24" @default.
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- W2279226493 date "1986-08-15" @default.
- W2279226493 modified "2023-09-23" @default.
- W2279226493 title "Lifetimes for spontaneous emission from the X-italic /sup 3/. sigma. /sup -/(v-italic = 1) and a-italic /sup 1/. delta. states of CH/sup -/" @default.
- W2279226493 hasPublicationYear "1986" @default.
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