Issues

 / 

2007

 / 

January

  

Instruments and methods of investigation


Surface-ionization field mass-spectrometry studies of nonequilibrium surface ionization

,
Ioffe Institute, ul. Polytekhnicheskaya 26, St. Petersburg, 194021, Russian Federation

The ionization of polyatomic molecules on tungsten and tungsten oxide surfaces is considered for quasiequilibrium or essentially nonequilibrium conditions (in the latter case, the term nonequilibrium surface ionization is used for adsorbate ionization). Heterogeneous reactions are supposed to proceed through monomolecular decay of polyatomic molecules or fragments of multimolecular complexes. The nonequilibrium nature of these reactions is established. The dependences of the current density of disordered ions on the surface temperature, electric field strength, and ionized particle energy distribution are obtained in analytical form. Heterogeneous dissociation energies, the ionization potentials of radicals, and the magnitude of reaction departure from equilibrium are determined from experimental data, as are energy exchange times between reaction products and surfaces, the number of molecules in molecular complexes, and the number of effective degrees of freedom in molecules and complexes. In collecting the data a new technique relying on surface-ionization field mass spectrometry was applied.

Fulltext pdf (442 KB)
Fulltext is also available at DOI: 10.1070/PU2007v050n01ABEH006115
PACS: 33.80.Eh, 36.20.−r, 68.43.−h, 79.70.+q (all)
DOI: 10.1070/PU2007v050n01ABEH006115
URL: https://ufn.ru/en/articles/2007/1/c/
000246449500003
2-s2.0-34249732436
2007PhyU...50...53B
Citation: Blashenkov N M, Lavrent’ev G Ya "Surface-ionization field mass-spectrometry studies of nonequilibrium surface ionization" Phys. Usp. 50 53–78 (2007)
BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks

Оригинал: Блашенков Н М, Лаврентьев Г Я «Исследование неравновесной поверхностной ионизации методом полевой поверхностно-ионизационной масс-спектрометрии» УФН 177 59–85 (2007); DOI: 10.3367/UFNr.0177.200701c.0059

References (61) Cited by (5) ↓ Similar articles (8)

  1. Kapustin V I, Nagornov K O et al Russ. J. Phys. Chem. B 5 689 (2011)
  2. Lavtrent’ev G Ya, Blashenkov N M, Golubev O L Tech. Phys. 55 1051 (2010)
  3. Blashenkov N M, Lavrent’ev G Ya Tech. Phys. 54 1368 (2009)
  4. Lavrent’ev G Ya Tech. Phys. 54 110 (2009)
  5. J. Mass Spectrom. 42 1522 (2007)

© 1918–2024 Uspekhi Fizicheskikh Nauk
Email: ufn@ufn.ru Editorial office contacts About the journal Terms and conditions