Photoionization and the Jesse Effect: A Comparison of Yields and Isotope Effects

The comparison of the ionization yield from the Jesse effect $\eta _{{\rm J}}$ and the photoionization yield $\eta _{{\rm P}}$, as first made by Platzman, is updated, with a graphical comparison shown for the case of benzene. The majority of examples show $\eta _{{\rm J}}\approx \eta _{{\rm P}}$ and...

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Bibliographic Details
Published in:Radiation research 1974-08, Vol.59 (2), p.408-421
Main Author: Person, James C.
Format: Article
Language:English
Subjects:
Argon
Argon - radiation effects
Electrons
Energy
Energy transfer
Energy value
Gases - radiation effects
Helium
Helium - radiation effects
Ionization
Ions
Isotope effects
Isotopes
Krypton - radiation effects
Molecules
Neon - radiation effects
P values
Photoionization
Radiation Effects
Symposium on the Jesse Effect and Related Phenomena
Xenon - radiation effects
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Summary:The comparison of the ionization yield from the Jesse effect $\eta _{{\rm J}}$ and the photoionization yield $\eta _{{\rm P}}$, as first made by Platzman, is updated, with a graphical comparison shown for the case of benzene. The majority of examples show $\eta _{{\rm J}}\approx \eta _{{\rm P}}$ and most of the other $\eta _{{\rm J}}$ values are about 10-20% lower than the $\eta _{{\rm P}}$ values. Isotope effects are also compared and the $\eta _{{\rm J}}$ data are used to estimate the fraction of ionization via direct ionization. The implications of these comparisons are discussed, particularly those concerning the nature of the Jesse precursors. In addition, the use of different ionization chamber geometries is suggested as a means of testing the importance of escape of vacuum ultraviolet radiation as a decay process for the Jesse precursors.
ISSN:0033-7587
1938-5404
DOI:10.2307/3573988