Electron impact ionization of the SO2 molecule

R. Basner, M. Schmidt, H. Deutsch, V. Tarnovsky, A. Levin, K. Becker

Research output: Contribution to journalArticle

Abstract

We report measurements of the absolute cross sections for the electron-impact ionization of SO2 from threshold to 200 eV. Absolute cross sections for the formation of the SO2 - parent ions and of the SO+, S+, O+, and O2 + fragment ions were obtained independently in two different laboratories using two different experimental techniques with uncertainties ranging from ±18% to ±25%. The level of agreement between the absolute cross sections (at 70 eV) obtained by the two techniques ranges from about 10% for SO2 + and SO+ to 20% for (S ++O2 +) and O+, which in all cases is well within the combined error margins of the two measurements. The high resolution capability of the mass spectrometer employed in one experiment enabled the separation of the S+ and O2 + fragment ions, which are separated by only 0.017 76 atomic mass units (amu), for the first time. The single positive ion formation is the dominant process for all observed product ions. The total single SO2 ionization cross section obtained by the two techniques agreed to within 8%. A comparison of the experimentally determined total SO2 single ionization cross sections with calculated cross sections based on a modified additivity rule revealed agreement to within 20%.

Original languageEnglish (US)
Pages (from-to)211-218
Number of pages8
JournalThe Journal of chemical physics
Volume103
Issue number1
StatePublished - 1995

Fingerprint

Impact ionization
electron impact
Ions
ionization
Molecules
Electrons
cross sections
ionization cross sections
Ionization
molecules
ions
fragments
atomic weights
Mass spectrometers
positive ions
mass spectrometers
margins
Positive ions
thresholds
high resolution

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Basner, R., Schmidt, M., Deutsch, H., Tarnovsky, V., Levin, A., & Becker, K. (1995). Electron impact ionization of the SO2 molecule. The Journal of chemical physics, 103(1), 211-218.

Electron impact ionization of the SO2 molecule. / Basner, R.; Schmidt, M.; Deutsch, H.; Tarnovsky, V.; Levin, A.; Becker, K.

In: The Journal of chemical physics, Vol. 103, No. 1, 1995, p. 211-218.

Research output: Contribution to journalArticle

Basner, R, Schmidt, M, Deutsch, H, Tarnovsky, V, Levin, A & Becker, K 1995, 'Electron impact ionization of the SO2 molecule', The Journal of chemical physics, vol. 103, no. 1, pp. 211-218.
Basner R, Schmidt M, Deutsch H, Tarnovsky V, Levin A, Becker K. Electron impact ionization of the SO2 molecule. The Journal of chemical physics. 1995;103(1):211-218.
Basner, R. ; Schmidt, M. ; Deutsch, H. ; Tarnovsky, V. ; Levin, A. ; Becker, K. / Electron impact ionization of the SO2 molecule. In: The Journal of chemical physics. 1995 ; Vol. 103, No. 1. pp. 211-218.
@article{03207feb0813443fa5761be5e46ea1e9,
title = "Electron impact ionization of the SO2 molecule",
abstract = "We report measurements of the absolute cross sections for the electron-impact ionization of SO2 from threshold to 200 eV. Absolute cross sections for the formation of the SO2 - parent ions and of the SO+, S+, O+, and O2 + fragment ions were obtained independently in two different laboratories using two different experimental techniques with uncertainties ranging from ±18{\%} to ±25{\%}. The level of agreement between the absolute cross sections (at 70 eV) obtained by the two techniques ranges from about 10{\%} for SO2 + and SO+ to 20{\%} for (S ++O2 +) and O+, which in all cases is well within the combined error margins of the two measurements. The high resolution capability of the mass spectrometer employed in one experiment enabled the separation of the S+ and O2 + fragment ions, which are separated by only 0.017 76 atomic mass units (amu), for the first time. The single positive ion formation is the dominant process for all observed product ions. The total single SO2 ionization cross section obtained by the two techniques agreed to within 8{\%}. A comparison of the experimentally determined total SO2 single ionization cross sections with calculated cross sections based on a modified additivity rule revealed agreement to within 20{\%}.",
author = "R. Basner and M. Schmidt and H. Deutsch and V. Tarnovsky and A. Levin and K. Becker",
year = "1995",
language = "English (US)",
volume = "103",
pages = "211--218",
journal = "Journal of Chemical Physics",
issn = "0021-9606",
publisher = "American Institute of Physics Publising LLC",
number = "1",

}

TY - JOUR

T1 - Electron impact ionization of the SO2 molecule

AU - Basner, R.

AU - Schmidt, M.

AU - Deutsch, H.

AU - Tarnovsky, V.

AU - Levin, A.

AU - Becker, K.

PY - 1995

Y1 - 1995

N2 - We report measurements of the absolute cross sections for the electron-impact ionization of SO2 from threshold to 200 eV. Absolute cross sections for the formation of the SO2 - parent ions and of the SO+, S+, O+, and O2 + fragment ions were obtained independently in two different laboratories using two different experimental techniques with uncertainties ranging from ±18% to ±25%. The level of agreement between the absolute cross sections (at 70 eV) obtained by the two techniques ranges from about 10% for SO2 + and SO+ to 20% for (S ++O2 +) and O+, which in all cases is well within the combined error margins of the two measurements. The high resolution capability of the mass spectrometer employed in one experiment enabled the separation of the S+ and O2 + fragment ions, which are separated by only 0.017 76 atomic mass units (amu), for the first time. The single positive ion formation is the dominant process for all observed product ions. The total single SO2 ionization cross section obtained by the two techniques agreed to within 8%. A comparison of the experimentally determined total SO2 single ionization cross sections with calculated cross sections based on a modified additivity rule revealed agreement to within 20%.

AB - We report measurements of the absolute cross sections for the electron-impact ionization of SO2 from threshold to 200 eV. Absolute cross sections for the formation of the SO2 - parent ions and of the SO+, S+, O+, and O2 + fragment ions were obtained independently in two different laboratories using two different experimental techniques with uncertainties ranging from ±18% to ±25%. The level of agreement between the absolute cross sections (at 70 eV) obtained by the two techniques ranges from about 10% for SO2 + and SO+ to 20% for (S ++O2 +) and O+, which in all cases is well within the combined error margins of the two measurements. The high resolution capability of the mass spectrometer employed in one experiment enabled the separation of the S+ and O2 + fragment ions, which are separated by only 0.017 76 atomic mass units (amu), for the first time. The single positive ion formation is the dominant process for all observed product ions. The total single SO2 ionization cross section obtained by the two techniques agreed to within 8%. A comparison of the experimentally determined total SO2 single ionization cross sections with calculated cross sections based on a modified additivity rule revealed agreement to within 20%.

UR - http://www.scopus.com/inward/record.url?scp=0000525579&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000525579&partnerID=8YFLogxK

M3 - Article

VL - 103

SP - 211

EP - 218

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

SN - 0021-9606

IS - 1

ER -