Ionization Efficiency Curves of C2D2 by Electron Impact

Isao H. Suzuki; Kogoro Maeda

doi:10.5702/massspec1953.27.31

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Keywords: Ionization Efficiency Curve, Deutero-acetylene, Monoenergetic Electron Beam, Autoionization, Appearance Potential

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1979 Volume 27 Issue 1 Pages 31-40

DOI https://doi.org/10.5702/massspec1953.27.31

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Published: March 31, 1979 Received: December 11, 1978 Available on J-STAGE: June 28, 2010 Accepted: - Advance online publication: - Revised: -
Correction information
Date of correction: June 28, 2010 Reason for correction: - Correction: AFFILIATION Details: Wrong :
1) Electrotechnical Laboratory, Tanashi, Tokyo, Japan.

Right :
1) Electrotechnical Laboratory,

Date of correction: June 28, 2010 Reason for correction: - Correction: KEYWORD Details: Wrong : Ionization Efficiency Curve Deutero-acetylene Monoenergetic Electron Beam Autoionization Appearance Potential
Right : Ionization Efficiency Curve, Deutero-acetylene, Monoenergetic Electron Beam, Autoionization, Appearance Potential

Date of correction: June 28, 2010 Reason for correction: - Correction: CITATION Details: Wrong : E
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I. H. Suzuki and K. Maeda, Int. J. Mass Spectrom. Ion Phys., 15, 281(1974).
I. H. Suzuki and K. Maeda, Int. J. Mass Spectrom. Ion Phys., 24, 147(1977).
C. Baker and D. W. Turner, Proc. Roy. Soc., 308A, 19(1968).
I. H. Suzuki, Res. Electrotechnical Laboratory, 766,(1976).
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Abstract

Ionization efficiency curves have been measured for the ions produced from C2D2 by monoenergetic electron impact over ranges of about 10 eV near their appearance thresholds. The breaks in the total ionization efficiency curve were found to correspond to the ionic and autoionizing states of C2D2. The curve was reproduced by using a simulation technique, and the degrees of contribution from those states to the total ion intensity were estimated. The total contribution from all autoionizing states was found to reach 40% near 16 eV. This degree of C2D2 is higher than that of C2H2 below 20 eV. No indication of isotope effect was found on the appearance potentials of the fragment ions.

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