Ionic fragmentation of SiH4 following the K-shell excitation

Eiji Shigemasa; Kiyoshi Ueda; Yukinori Sato; Akira Yagishita; Hideki Maezawa; Taizo Sasaki; Masatoshi Ukai; Tatsuji Hayaishi

doi:10.1088/0031-8949/41/1/017

Ionic fragmentation of SiH₄ following the K-shell excitation

Eiji Shigemasa, Kiyoshi Ueda, Yukinori Sato, Akira Yagishita, Hideki Maezawa, Taizo Sasaki, Masatoshi Ukai, Tatsuji Hayaishi

Division of Measurements

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Abstract

Ionic fragmentation of SiH₄ has been studied in the vicinity of the Si: K-edge in the photon energy range 1800-1900eV. Ionic fragments observed at photon energies above the Si: Ls → σ* excitation are mostly atomic ions Si^q+ (q = 1-3) and H⁺. Ratios of the abundances for Si⁺, and Si²⁺ and Si³⁺ are roughly 4:4:1, and the abundance of H⁺ is much higher than the sum of the Si⁺, Si²⁺ and Si³⁺ abundances. The averaged kinetic energy release given to H⁺ is estimated to be about 12eV. This complete decomposition of SiH₄ with the ejection of energetic H⁺ is interpreted as Coulomb explosion of the multiply-charged (mainly +4 or +5) parent ion produced via the vacancy cascade (successive Auger and/or Coster-Kronig transitions).

Original language	English
Pages (from-to)	67-70
Number of pages	4
Journal	Physica Scripta
Volume	41
Issue number	1
DOIs	https://doi.org/10.1088/0031-8949/41/1/017
Publication status	Published - 1990 Jan 1

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Mathematical Physics
Condensed Matter Physics
Physics and Astronomy(all)

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10.1088/0031-8949/41/1/017

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title = "Ionic fragmentation of SiH4 following the K-shell excitation",

abstract = "Ionic fragmentation of SiH4 has been studied in the vicinity of the Si: K-edge in the photon energy range 1800-1900eV. Ionic fragments observed at photon energies above the Si: Ls → σ* excitation are mostly atomic ions Siq+ (q = 1-3) and H+. Ratios of the abundances for Si+, and Si2+ and Si3+ are roughly 4:4:1, and the abundance of H+ is much higher than the sum of the Si+, Si2+ and Si3+ abundances. The averaged kinetic energy release given to H+ is estimated to be about 12eV. This complete decomposition of SiH4 with the ejection of energetic H+ is interpreted as Coulomb explosion of the multiply-charged (mainly +4 or +5) parent ion produced via the vacancy cascade (successive Auger and/or Coster-Kronig transitions).",

author = "Eiji Shigemasa and Kiyoshi Ueda and Yukinori Sato and Akira Yagishita and Hideki Maezawa and Taizo Sasaki and Masatoshi Ukai and Tatsuji Hayaishi",

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T1 - Ionic fragmentation of SiH4 following the K-shell excitation

AU - Shigemasa, Eiji

AU - Ueda, Kiyoshi

AU - Sato, Yukinori

AU - Yagishita, Akira

AU - Maezawa, Hideki

AU - Sasaki, Taizo

AU - Ukai, Masatoshi

AU - Hayaishi, Tatsuji

PY - 1990/1/1

Y1 - 1990/1/1

N2 - Ionic fragmentation of SiH4 has been studied in the vicinity of the Si: K-edge in the photon energy range 1800-1900eV. Ionic fragments observed at photon energies above the Si: Ls → σ* excitation are mostly atomic ions Siq+ (q = 1-3) and H+. Ratios of the abundances for Si+, and Si2+ and Si3+ are roughly 4:4:1, and the abundance of H+ is much higher than the sum of the Si+, Si2+ and Si3+ abundances. The averaged kinetic energy release given to H+ is estimated to be about 12eV. This complete decomposition of SiH4 with the ejection of energetic H+ is interpreted as Coulomb explosion of the multiply-charged (mainly +4 or +5) parent ion produced via the vacancy cascade (successive Auger and/or Coster-Kronig transitions).

AB - Ionic fragmentation of SiH4 has been studied in the vicinity of the Si: K-edge in the photon energy range 1800-1900eV. Ionic fragments observed at photon energies above the Si: Ls → σ* excitation are mostly atomic ions Siq+ (q = 1-3) and H+. Ratios of the abundances for Si+, and Si2+ and Si3+ are roughly 4:4:1, and the abundance of H+ is much higher than the sum of the Si+, Si2+ and Si3+ abundances. The averaged kinetic energy release given to H+ is estimated to be about 12eV. This complete decomposition of SiH4 with the ejection of energetic H+ is interpreted as Coulomb explosion of the multiply-charged (mainly +4 or +5) parent ion produced via the vacancy cascade (successive Auger and/or Coster-Kronig transitions).

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JO - Physica Scripta

JF - Physica Scripta

SN - 0031-8949

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Ionic fragmentation of SiH₄ following the K-shell excitation

Abstract

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