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Title: Differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact

Abstract

Interaction between polycyclic aromatic hydrocarbon (PAH) molecule and energetic ion is a subject of interest in different areas of modern physics. Here, we present measurements of energy and angular distributions of absolute double differential electron emission cross section for coronene (C 24H 12) and fluorene (C 13H 10) molecules under fast bare oxygen ion impact. For coronene, the angular distributions of the low energy electrons are quite different from that of simpler targets like Ne or CH 4, which is not the case for fluorene. The behaviour of the higher electron energy distributions for both the targets are similar to that for simple targets. In case of coronene, a clear signature of plasmon resonance is observed in the analysis of forward-backward angular asymmetry of low energy electron emission. For fluorene, such signature is not identified probably due to lower oscillator strength of plasmon compared to the coronene. The theoretical calculation based on the first-order Born approximation with correct boundary conditions (CB1), in general, reproduced the experimental observations qualitatively, for both the molecules, except in the low energy region for coronene, which again indicates the role of collective excitation. Single differential and total cross sections are also deduced. An overall comparativemore » study is presented.« less

Authors:
 [1];  [2];  [3];  [1]
  1. Tata Inst. of Fundamental Research. Mumbai (India). Dept. of Nuclear and atomic Physics
  2. Univ. of Bordeaux, Gradignan (France). Centre d' Etudes Nucleaires de Bordeaux Gradignan (CENBG)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1421614
Report Number(s):
SAND-2017-11984J
Journal ID: ISSN 2045-2322; 658453
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Chemical physics; Atomic and molecular collision processes

Citation Formats

Biswas, Shubhadeep, Champion, Christophe, Weck, P. F., and Tribedi, Lokesh C. Differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact. United States: N. p., 2017. Web. doi:10.1038/s41598-017-05149-8.
Biswas, Shubhadeep, Champion, Christophe, Weck, P. F., & Tribedi, Lokesh C. Differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact. United States. doi:10.1038/s41598-017-05149-8.
Biswas, Shubhadeep, Champion, Christophe, Weck, P. F., and Tribedi, Lokesh C. Mon . "Differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact". United States. doi:10.1038/s41598-017-05149-8. https://www.osti.gov/servlets/purl/1421614.
@article{osti_1421614,
title = {Differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact},
author = {Biswas, Shubhadeep and Champion, Christophe and Weck, P. F. and Tribedi, Lokesh C.},
abstractNote = {Interaction between polycyclic aromatic hydrocarbon (PAH) molecule and energetic ion is a subject of interest in different areas of modern physics. Here, we present measurements of energy and angular distributions of absolute double differential electron emission cross section for coronene (C24H12) and fluorene (C13H10) molecules under fast bare oxygen ion impact. For coronene, the angular distributions of the low energy electrons are quite different from that of simpler targets like Ne or CH4, which is not the case for fluorene. The behaviour of the higher electron energy distributions for both the targets are similar to that for simple targets. In case of coronene, a clear signature of plasmon resonance is observed in the analysis of forward-backward angular asymmetry of low energy electron emission. For fluorene, such signature is not identified probably due to lower oscillator strength of plasmon compared to the coronene. The theoretical calculation based on the first-order Born approximation with correct boundary conditions (CB1), in general, reproduced the experimental observations qualitatively, for both the molecules, except in the low energy region for coronene, which again indicates the role of collective excitation. Single differential and total cross sections are also deduced. An overall comparative study is presented.},
doi = {10.1038/s41598-017-05149-8},
journal = {Scientific Reports},
number = 1,
volume = 7,
place = {United States},
year = {2017},
month = {7}
}

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