Dissociative electron attachment and anion-induced dimerization in pyruvic acid

2018 ◽  
Vol 20 (10) ◽  
pp. 6838-6844 ◽  
Author(s):  
M. Zawadzki ◽  
M. Ranković ◽  
J. Kočišek ◽  
J. Fedor
Keyword(s):  
Pyruvic Acid ◽  
Electron Attachment ◽  
Dissociative Electron Attachment

Electron-triggered fragmentation of pyruvic acid and the fate of fragments in denser environments.

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.

UV-Photoelectron, Electron Transmission, and Dissociative Electron Attachment Spectroscopies of Acetone Oximes

1998 ◽  
Vol 102 (41) ◽  
pp. 8037-8043 ◽  
Author(s):  
Dal Colle ◽  
Giuseppe Distefano ◽  
Alberto Modelli ◽  
Derek Jones ◽  
Maurizio Guerra ◽  
...  
Keyword(s):  
Electron Attachment ◽  
Dissociative Electron Attachment ◽  
Electron Transmission
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