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- W1994121170 abstract "The photoelectron spectrum of CH−2 has been reinvestigated using a new apparatus that incorporates a flowing afterglow ion source, providing vibrational and rotational cooling of the sample ions. Earlier photoelectron studies [J. Chem. Phys. 74, 5460 (1981)] employing gas discharge and sputter ion sources were plagued by hot CH−2 ions whose vibrational population distribution, for reasons not yet explicable, could not be detectably altered by modification of source conditions. In contrast, the spectrum of cooled CH−2 displays a markedly changed vibronic band intensity profile for the CH−2 (2B1) →−e− CH2(3B1) transition. These results enable several previously observed spectral features to be positively identified as vibrational hot bands. The new CH−2 photoelectron spectrum is consistent only with the methylene singlet–triplet splitting of approximately 9 kcal/mol determined by numerous recent experimental and theoretical studies." @default.
- W1994121170 created "2016-06-24" @default.
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- W1994121170 date "1984-07-15" @default.
- W1994121170 modified "2023-09-23" @default.
- W1994121170 title "Laser photoelectron spectroscopy of vibrationally relaxed CH<sup>−</sup><sub>2</sub>: A reinvestigation of the singlet–triplet splitting in methylene" @default.
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- W1994121170 doi "https://doi.org/10.1063/1.447741" @default.
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