Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges

This article reviews our recent works on the ion desorption from adsorbed and condensed molecules at low temperature following the core-level photoexcitations using synchrotron soft x-rays. The systems investigated here are adsorbed molecules with relatively heavy molecular weight containing third-r...

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Published in:	Физика низких температур
Date:	2003
Main Author:	Yuji Baba
Format:	Article
Language:	English
Published:	Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2003
Subjects:	Electronically Induced Phenomena: Low Temperature Aspects
Online Access:	https://nasplib.isofts.kiev.ua/handle/123456789/128819
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Journal Title:	Digital Library of Periodicals of National Academy of Sciences of Ukraine
Cite this:	Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges / Yuji Baba // Физика низких температур. — 2003. — Т. 29, № 3. — С. 303-320. — Бібліогр.: 75 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine

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spelling	Yuji Baba 2018-01-14T09:10:23Z 2018-01-14T09:10:23Z 2003 Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges / Yuji Baba // Физика низких температур. — 2003. — Т. 29, № 3. — С. 303-320. — Бібліогр.: 75 назв. — англ. 0132-6414 PACS: 79.20.La, 29.30.Kv https://nasplib.isofts.kiev.ua/handle/123456789/128819 This article reviews our recent works on the ion desorption from adsorbed and condensed molecules at low temperature following the core-level photoexcitations using synchrotron soft x-rays. The systems investigated here are adsorbed molecules with relatively heavy molecular weight containing third-row elements such as Si, P, S, and Cl. Compared with molecules composed of second-row elements, the highly element-specific and site-specific fragment-ion desorptions were observed when we tune the photon energy at the dipole-allowed 1s→s(3p) resonance. On the basis of the resonance Auger decay spectra around the 1s ionization thresholds, the observed highly specific ion desorption is interpreted by the localization of the excited electrons (here we call as "spectator electrons") in the antibonding s* orbital. In order to separate the direct photo-induced process from the indirect processes triggered by the secondary electrons, the photon-stimulated ion desorption was also investigated in well-controlled mono- and multilayered molecules. The results confirmed that the resonant photoexcitation not in the substrate but in the thin films of adsorbates plays a significant role in the realization of the highly specific ion desorption. The works reported here have been done with the excellent collaborations of Drs. T.A. Sasaki, H. Yamamoto, K. Yoshii, Y. Teraoka, T. Sekiguchi, and I. Shimoyama of Japan Atomic Energy Research Institute (JAERI). The most of the experiments presented here were performed at the BL-27A station of the Photon Factory in the High Energy Accelerator Research Organization (KEK-PF). I am deeply grateful to the support of the stuff of the KEK-PF, in particular Professor K. Kobayashi. Also Drs. H. Motohashi, H. Konish, A. Yokoya, and the stuff of JAERI are gratefully acknowledged for the technical supports for the experiments as well as fruitful discussion. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Electronically Induced Phenomena: Low Temperature Aspects Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges Article published earlier
institution	Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection	DSpace DC
title	Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges
spellingShingle	Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges Yuji Baba Electronically Induced Phenomena: Low Temperature Aspects
title_short	Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges
title_full	Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges
title_fullStr	Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges
title_full_unstemmed	Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges
title_sort	element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the k-edges
author	Yuji Baba
author_facet	Yuji Baba
topic	Electronically Induced Phenomena: Low Temperature Aspects
topic_facet	Electronically Induced Phenomena: Low Temperature Aspects
publishDate	2003
language	English
container_title	Физика низких температур
publisher	Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
format	Article
description	This article reviews our recent works on the ion desorption from adsorbed and condensed molecules at low temperature following the core-level photoexcitations using synchrotron soft x-rays. The systems investigated here are adsorbed molecules with relatively heavy molecular weight containing third-row elements such as Si, P, S, and Cl. Compared with molecules composed of second-row elements, the highly element-specific and site-specific fragment-ion desorptions were observed when we tune the photon energy at the dipole-allowed 1s→s(3p) resonance. On the basis of the resonance Auger decay spectra around the 1s ionization thresholds, the observed highly specific ion desorption is interpreted by the localization of the excited electrons (here we call as "spectator electrons") in the antibonding s* orbital. In order to separate the direct photo-induced process from the indirect processes triggered by the secondary electrons, the photon-stimulated ion desorption was also investigated in well-controlled mono- and multilayered molecules. The results confirmed that the resonant photoexcitation not in the substrate but in the thin films of adsorbates plays a significant role in the realization of the highly specific ion desorption.
issn	0132-6414
url	https://nasplib.isofts.kiev.ua/handle/123456789/128819
citation_txt	Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges / Yuji Baba // Физика низких температур. — 2003. — Т. 29, № 3. — С. 303-320. — Бібліогр.: 75 назв. — англ.
work_keys_str_mv	AT yujibaba elementspecificandsitespecificiondesorptionfromadsorbedmoleculesbydeepcorelevelphotoexcitationatthekedges
first_indexed	2025-12-07T20:17:25Z
last_indexed	2025-12-07T20:17:25Z
_version_	1850882019960029184

Element-specific and site-specific ion desorption from adsorbed molecules by deep core-level photoexcitation at the K-edges

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