IR photon enhanced dissociative electron attachment to SF6: Dependence on photon, vibrational, and electron energy

2006 ◽  
Vol 329 (1-3) ◽  
pp. 148-162 ◽  
Author(s):  
M. Braun ◽  
F. Gruber ◽  
M.-W. Ruf ◽  
S.V.K. Kumar ◽  
E. Illenberger ◽  
...  
Keyword(s):  
Electron Energy ◽  
Electron Attachment ◽  
Dissociative Electron Attachment

Dissociative electron attachment to HNO3 and its hydrates: energy-selective electron-induced chemistry

2019 ◽  
Vol 21 (17) ◽  
pp. 8691-8697 ◽  
Author(s):  
Jozef Lengyel ◽  
Juraj Fedor ◽  
Michal Fárník
Keyword(s):  
Nitric Acid ◽  
Electron Energy ◽  
Water Clusters ◽  
Electron Attachment ◽  
Acid Water ◽  
Dissociative Electron Attachment

The chemistry of mixed nitric acid–water clusters triggered by electron attachment depends on clustering and the electron energy.

scholarly journals Direct observation of long-lived cyanide anions in superexcited states

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Xiao-Fei Gao ◽  
Jing-Chen Xie ◽  
Hao Li ◽  
Xin Meng ◽  
Yong Wu ◽  
...  
Keyword(s):  
Direct Observation ◽  
Electron Attachment ◽  
Planetary Atmosphere ◽  
Interstellar Space ◽  
Dissociative Electron Attachment ◽  
Circumstellar Envelopes ◽  
Vibrational States ◽  
Cyanide Anion ◽  
Exceptional Stability ◽  
Electronic Ground

AbstractThe cyanide anion (CN−) has been identified in cometary coma, interstellar medium, planetary atmosphere and circumstellar envelopes, but its origin and abundance are still disputed. An isolated CN− is stabilized in the vibrational states up to ν = 17 of the electronic ground-state 1Σ+, but it is not thought to survive in the electronic or vibrational states above the electron autodetachment threshold, namely, in superexcited states. Here we report the direct observation of long-lived CN− yields of the dissociative electron attachment to cyanogen bromide (BrCN), and confirm that some of the CN− yields are distributed in the superexcited vibrational states ν ≥ 18 (1Σ+) or the superexcited electronic states 3Σ+ and 3Π. The triplet state can be accessed directly in the impulsive dissociation of BrCN− or by an intersystem transition from the superexcited vibrational states of CN−. The exceptional stability of CN− in the superexcited states profoundly influences its abundance and is potentially related to the production of other compounds in interstellar space.

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