Electron stimulated desorption ions of hydrogen and deuterium molecules in extremely high vacuum

M. Takizawa; A. Yoshimi; T. Katunuma; T. Yabe; C. Oshima

Electron stimulated desorption ions of hydrogen and deuterium molecules in extremely high vacuum

M. Takizawa^*, A. Yoshimi, T. Katunuma, T. Yabe, C. Oshima

^*Corresponding author for this work

Waseda University

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

By using an ionization gauge with a large-angle ion deflector, we have measured electron stimulated desorption (ESD) ions emitted from the grid in extremely high vacuum. Combination of energy analysis with mass analysis makes it possible to detect molecular species of ESD ions and gas-phase ions separately. The observed ESD ions in this experiment originate from a small amount of adsorbates, ∼ 10^-5 monolayer. The behavior of ESD' ions of hydrogen and deuterium has been observed by introducing the deuterium (D₂) gas at 1.9 × 10^-9 Pa. The D₂ ⁺ ions have been detected in the ESD mass spectra, but no peak has appeared at mass number 3 (HD). The energy of the D₂ ESD ions is the same as that of H₂ ions, which is slightly higher than that of H ESD ions. Time dependence of the ESD intensity indicates the existence of several chemisorption sites of H₂ and/or D₂ molecules at room temperature.

Original language	English
Pages (from-to)	571-573
Number of pages	3
Journal	Vacuum
Volume	47
Issue number	6-8
Publication status	Published - 1996 Jun

Keywords

Deuterium
ESD
Hydrogen
Platinum
XHV

ASJC Scopus subject areas

Surfaces, Coatings and Films
Condensed Matter Physics
Surfaces and Interfaces

Cite this

@article{6ecbd197b6a74c36aedd66ce5147b1d8,

title = "Electron stimulated desorption ions of hydrogen and deuterium molecules in extremely high vacuum",

abstract = "By using an ionization gauge with a large-angle ion deflector, we have measured electron stimulated desorption (ESD) ions emitted from the grid in extremely high vacuum. Combination of energy analysis with mass analysis makes it possible to detect molecular species of ESD ions and gas-phase ions separately. The observed ESD ions in this experiment originate from a small amount of adsorbates, ∼ 10-5 monolayer. The behavior of ESD' ions of hydrogen and deuterium has been observed by introducing the deuterium (D2) gas at 1.9 × 10-9 Pa. The D2 + ions have been detected in the ESD mass spectra, but no peak has appeared at mass number 3 (HD). The energy of the D2 ESD ions is the same as that of H2 ions, which is slightly higher than that of H ESD ions. Time dependence of the ESD intensity indicates the existence of several chemisorption sites of H2 and/or D2 molecules at room temperature.",

keywords = "Deuterium, ESD, Hydrogen, Platinum, XHV",

author = "M. Takizawa and A. Yoshimi and T. Katunuma and T. Yabe and C. Oshima",

year = "1996",

month = jun,

language = "English",

volume = "47",

pages = "571--573",

journal = "Vacuum",

issn = "0042-207X",

publisher = "Elsevier Limited",

number = "6-8",

}

TY - JOUR

T1 - Electron stimulated desorption ions of hydrogen and deuterium molecules in extremely high vacuum

AU - Takizawa, M.

AU - Yoshimi, A.

AU - Katunuma, T.

AU - Yabe, T.

AU - Oshima, C.

PY - 1996/6

Y1 - 1996/6

N2 - By using an ionization gauge with a large-angle ion deflector, we have measured electron stimulated desorption (ESD) ions emitted from the grid in extremely high vacuum. Combination of energy analysis with mass analysis makes it possible to detect molecular species of ESD ions and gas-phase ions separately. The observed ESD ions in this experiment originate from a small amount of adsorbates, ∼ 10-5 monolayer. The behavior of ESD' ions of hydrogen and deuterium has been observed by introducing the deuterium (D2) gas at 1.9 × 10-9 Pa. The D2 + ions have been detected in the ESD mass spectra, but no peak has appeared at mass number 3 (HD). The energy of the D2 ESD ions is the same as that of H2 ions, which is slightly higher than that of H ESD ions. Time dependence of the ESD intensity indicates the existence of several chemisorption sites of H2 and/or D2 molecules at room temperature.

AB - By using an ionization gauge with a large-angle ion deflector, we have measured electron stimulated desorption (ESD) ions emitted from the grid in extremely high vacuum. Combination of energy analysis with mass analysis makes it possible to detect molecular species of ESD ions and gas-phase ions separately. The observed ESD ions in this experiment originate from a small amount of adsorbates, ∼ 10-5 monolayer. The behavior of ESD' ions of hydrogen and deuterium has been observed by introducing the deuterium (D2) gas at 1.9 × 10-9 Pa. The D2 + ions have been detected in the ESD mass spectra, but no peak has appeared at mass number 3 (HD). The energy of the D2 ESD ions is the same as that of H2 ions, which is slightly higher than that of H ESD ions. Time dependence of the ESD intensity indicates the existence of several chemisorption sites of H2 and/or D2 molecules at room temperature.

KW - Deuterium

KW - ESD

KW - Hydrogen

KW - Platinum

KW - XHV

UR - http://www.scopus.com/inward/record.url?scp=0030171237&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030171237&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0030171237

SN - 0042-207X

VL - 47

SP - 571

EP - 573

JO - Vacuum

JF - Vacuum

IS - 6-8

ER -

Electron stimulated desorption ions of hydrogen and deuterium molecules in extremely high vacuum

Abstract

Keywords

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this