Formation of smaller anions from (n = 1 – 3, 5 – 7) in the circumstellar medium

Chacko, Roby and Banhatti, S and Nrisimhamurty, M and Yadav, J K (2020) Formation of smaller anions from (n = 1 – 3, 5 – 7) in the circumstellar medium. [Publications (Pre-joining)]

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Abstract

We probe a new pathway for the formation of smaller anions from the temporary negative ion states (anion resonances) of C n N− (n = 1–3, 5–7) in the circumstellar envelope of IRC+10216. C n N− (n = 1–3, 5–7) anions were collisionally excited to their resonance states and were observed to decay into a variety of smaller anions. The measured kinetic-energy-release distributions for the anionic fragments arising from each of the parent anions indicate a concerted manner of occurrence of these fragments, implying rich dissociation dynamics. and C2N− were found to be dominant fragments of these anions, suggesting their presence in the external layers of IRC+10216 where UV photons penetrate. C n N− (n = 1–3) were also observed to undergo dissociative and nondissociative double-electron detachments, with the former being dominant. The significance of this new pathway in determining the stability and abundance of anions in IRC+10216 is discussed.

Item Type:	Publications (Pre-joining)
Authors:	Chacko, Roby and Banhatti, S and Nrisimhamurty, M and Yadav, J K
Document Language:	Language English
Subjects:	Natural Sciences Natural Sciences > Astronomy & allied sciences
Divisions:	Azim Premji University - Bengaluru > School of Arts and Sciences
Full Text Status:	Restricted
URI:	http://publications.azimpremjiuniversity.edu.in/id/eprint/6556
Publisher URL:	https://iopscience.iop.org/journal/0004-637X

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