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Title: M/sub 4,5/N/sub 4,5/X Auger electron spectra of iodine and xenon Many-body effects

Abstract

High-resolution M/sub 4,5/N/sub 2,3/N/sub 4,5/, M/sub 4,5/N/sub 4,5/N/sub 4,5/, and M/sub 4,5/N/sub 4,5/O Auger spectra from I/sub 2/ vapor and from Xe gas have been measured using electron-beam excitation. In order to reduce satellite backgrounds, the M/sub 4,5/N/sub 4,5/N/sub 4,5/ spectra were also taken using primary-beam energies just below the core-ionization energy of the M/sub 3/ levels of iodine and xenon. The relative line energies and intensities for all of the xenon spectra and for iodine M/sub 4,5/N/sub 4,5/N/sub 4,5/ spectra have been calculated in the mixed-coupling scheme. The agreement between theory and experiment is excellent for the M/sub 4,5/N/sub 4,5/N/sub 4,5/ spectra of both xenon and iodine. The agreement for the xenon M/sub 4,5/N/sub 2,3/N/sub 4,5/ spectrum is less good, but is close enough to indicate the approximate validity of the independent-electron model. This result is in contrast to that for one-hole states involving the N/sub 2,3/ shell; such a model fails completely to account for the xenon 4p photoemission spectrum. The independent-electron model will not account for the M/sub 4,5/N/sub 2,3/N/sub 4,5/ spectrum of iodine. Reasons for the success of this model for xenon and its failure for iodine are presented. The observed inherent linewidths of the Augermore » lines are considerably broader in molecular iodine than in xenon. The photoelectron spectra and core-ionization energies of the 3d, 4s, 4p, 4d, 5s, and 5p levels of I/sub 2/ have been measured. The role of extra-atomic relaxation in the observed Auger energies is discussed.« less

Authors:
; ;
Publication Date:
Research Org.:
Department of Physics, University of Oulu, SF-90100 Oulu 10, Finland
OSTI Identifier:
6268295
Resource Type:
Journal Article
Journal Name:
Phys. Rev., A; (United States)
Additional Journal Information:
Journal Volume: 19:2
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ELECTRON-ATOM COLLISIONS; IONIZATION; ELECTRON-MOLECULE COLLISIONS; IODINE; XENON; AUGER EFFECT; EXCITATION; M SHELL; N SHELL; ATOM COLLISIONS; COLLISIONS; ELECTRON COLLISIONS; ELECTRONIC STRUCTURE; ELEMENTS; ENERGY-LEVEL TRANSITIONS; HALOGENS; MOLECULE COLLISIONS; NONMETALS; RARE GASES; 640304* - Atomic, Molecular & Chemical Physics- Collision Phenomena

Citation Formats

Aksela, S., Aksela, H., and Thomas, T.D. M/sub 4,5/N/sub 4,5/X Auger electron spectra of iodine and xenon Many-body effects. United States: N. p., 1979. Web. doi:10.1103/PhysRevA.19.721.
Aksela, S., Aksela, H., & Thomas, T.D. M/sub 4,5/N/sub 4,5/X Auger electron spectra of iodine and xenon Many-body effects. United States. doi:10.1103/PhysRevA.19.721.
Aksela, S., Aksela, H., and Thomas, T.D. Thu . "M/sub 4,5/N/sub 4,5/X Auger electron spectra of iodine and xenon Many-body effects". United States. doi:10.1103/PhysRevA.19.721.
@article{osti_6268295,
title = {M/sub 4,5/N/sub 4,5/X Auger electron spectra of iodine and xenon Many-body effects},
author = {Aksela, S. and Aksela, H. and Thomas, T.D.},
abstractNote = {High-resolution M/sub 4,5/N/sub 2,3/N/sub 4,5/, M/sub 4,5/N/sub 4,5/N/sub 4,5/, and M/sub 4,5/N/sub 4,5/O Auger spectra from I/sub 2/ vapor and from Xe gas have been measured using electron-beam excitation. In order to reduce satellite backgrounds, the M/sub 4,5/N/sub 4,5/N/sub 4,5/ spectra were also taken using primary-beam energies just below the core-ionization energy of the M/sub 3/ levels of iodine and xenon. The relative line energies and intensities for all of the xenon spectra and for iodine M/sub 4,5/N/sub 4,5/N/sub 4,5/ spectra have been calculated in the mixed-coupling scheme. The agreement between theory and experiment is excellent for the M/sub 4,5/N/sub 4,5/N/sub 4,5/ spectra of both xenon and iodine. The agreement for the xenon M/sub 4,5/N/sub 2,3/N/sub 4,5/ spectrum is less good, but is close enough to indicate the approximate validity of the independent-electron model. This result is in contrast to that for one-hole states involving the N/sub 2,3/ shell; such a model fails completely to account for the xenon 4p photoemission spectrum. The independent-electron model will not account for the M/sub 4,5/N/sub 2,3/N/sub 4,5/ spectrum of iodine. Reasons for the success of this model for xenon and its failure for iodine are presented. The observed inherent linewidths of the Auger lines are considerably broader in molecular iodine than in xenon. The photoelectron spectra and core-ionization energies of the 3d, 4s, 4p, 4d, 5s, and 5p levels of I/sub 2/ have been measured. The role of extra-atomic relaxation in the observed Auger energies is discussed.},
doi = {10.1103/PhysRevA.19.721},
journal = {Phys. Rev., A; (United States)},
number = ,
volume = 19:2,
place = {United States},
year = {1979},
month = {2}
}