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...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Shubhadeep Biswas, Christophe Champion, P. F. Weck, Lokesh C. Tribedi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f5d654d700de4fe0ac5c6c9bd063d4eb
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:f5d654d700de4fe0ac5c6c9bd063d4eb
record_format	dspace
spelling	oai:doaj.org-article:f5d654d700de4fe0ac5c6c9bd063d4eb2021-12-02T11:52:18ZDifferential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact10.1038/s41598-017-05149-82045-2322https://doaj.org/article/f5d654d700de4fe0ac5c6c9bd063d4eb2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05149-8https://doaj.org/toc/2045-2322Abstract 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.Shubhadeep BiswasChristophe ChampionP. F. WeckLokesh C. TribediNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-15 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shubhadeep Biswas Christophe Champion P. F. Weck Lokesh C. Tribedi Differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact
description	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 (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.
format	article
author	Shubhadeep Biswas Christophe Champion P. F. Weck Lokesh C. Tribedi
author_facet	Shubhadeep Biswas Christophe Champion P. F. Weck Lokesh C. Tribedi
author_sort	Shubhadeep Biswas
title	Differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact
title_short	Differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact
title_full	Differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact
title_fullStr	Differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact
title_full_unstemmed	Differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact
title_sort	differential electron emission from polycyclic aromatic hydrocarbon molecules under fast ion impact
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/f5d654d700de4fe0ac5c6c9bd063d4eb
work_keys_str_mv	AT shubhadeepbiswas differentialelectronemissionfrompolycyclicaromatichydrocarbonmoleculesunderfastionimpact AT christophechampion differentialelectronemissionfrompolycyclicaromatichydrocarbonmoleculesunderfastionimpact AT pfweck differentialelectronemissionfrompolycyclicaromatichydrocarbonmoleculesunderfastionimpact AT lokeshctribedi differentialelectronemissionfrompolycyclicaromatichydrocarbonmoleculesunderfastionimpact
_version_	1718395139911581696

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

Ejemplares similares