skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Photoionization and electron-impact ionization of Kr3+


No abstract prepared.

; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 1050-2947; PLRAAN; TRN: US200813%%148
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review A; Journal Volume: 74; Related Information: Journal Publication Date: 2006
Country of Publication:
United States

Citation Formats

Lu, M., Alna'washi, G., Habibi, M., Gharaibeh, M.F., Phaneuf,R.A., Kilcoyne, A.L.D., Levenson, E., Schlachter, A.S., Cisneros, C., and Hinojosa, G. Photoionization and electron-impact ionization of Kr3+. United States: N. p., 2006. Web. doi:10.1103/PhysRevA.74.062701.
Lu, M., Alna'washi, G., Habibi, M., Gharaibeh, M.F., Phaneuf,R.A., Kilcoyne, A.L.D., Levenson, E., Schlachter, A.S., Cisneros, C., & Hinojosa, G. Photoionization and electron-impact ionization of Kr3+. United States. doi:10.1103/PhysRevA.74.062701.
Lu, M., Alna'washi, G., Habibi, M., Gharaibeh, M.F., Phaneuf,R.A., Kilcoyne, A.L.D., Levenson, E., Schlachter, A.S., Cisneros, C., and Hinojosa, G. Wed . "Photoionization and electron-impact ionization of Kr3+". United States. doi:10.1103/PhysRevA.74.062701.
title = {Photoionization and electron-impact ionization of Kr3+},
author = {Lu, M. and Alna'washi, G. and Habibi, M. and Gharaibeh, M.F. and Phaneuf,R.A. and Kilcoyne, A.L.D. and Levenson, E. and Schlachter, A.S. and Cisneros, C. and Hinojosa, G.},
abstractNote = {No abstract prepared.},
doi = {10.1103/PhysRevA.74.062701},
journal = {Physical Review A},
number = ,
volume = 74,
place = {United States},
year = {Wed May 10 00:00:00 EDT 2006},
month = {Wed May 10 00:00:00 EDT 2006}
  • Doubly differential cross sections for single and multiple ionization of Ar have been measured for 500, 750, and 1000 eV electron impact. The cross sections were measured as a function of projectile energy loss and scattering angle. The energy loss range was 0-85% of the initial projectile energy and scattering angles were between {+-}22 deg. The data were put on an absolute scale by normalizing to total ionization cross sections available in the literature and found to be in good agreement with the absolute electron impact cross sections from DuBois and Rudd. For 750 eV impact, a comparison was mademore » between the present electron impact data and positron impact data obtained using the same experimental conditions. The same energy dependence and yields for single ionization were found for both electron and positron impact. On the other hand, the double- and triple-ionization yields are smaller for positron impact as compared to electron impact. Comparisons with photoionization data showed that for outer shell ionization the fractions of double and triple ionization of argon by photon impact are in quite good agreement with the present electron impact data.« less
  • The cross sections for electron-impact double ionization of I/sup 1 +/ and Xe/sup 1 +/ ions (and to a lesser extent also of Xe/sup 2 +/, Xe/sup 3 +/, and Xe/sup 4 +/ ions) show a dominant resonancelike contribution which, both in shape and size, almost coincides with the partial 4d-photoionization cross section of Xe atoms.
  • Photoionization and electron-impact ionization of Xe3+ ions in the region of 4d inner-shell excitation-autoionization have been studied using interacting-beam spectroscopic techniques. Absolute cross sections for photoionization of Xe3+ have been obtained and the electron-impact spectrum has been normalized to previously published absolute data. The Xe3+ spectra show large contributions from 4dnf excitation-autoionization processes compared to the lower charge states of Xe due to the significant collapse of the nf wave functions into the ion core as the initial charge state of the ion is increased. In addition, a tentative value for the ionization potential of Xe3+ of 42.2+-0.2 eV wasmore » obtained.« less
  • Absolute photoionization cross sections for Kr5+ weremeasured in the photon energy range 74 175 eV using synchrotronradiation. For comparison, a detailed energy scan of the electron-impactionization cross section was made in the same energy range and normalizedto previously published absolute measurements. The Flexible Atomic Codeand Cowan atomic structure code were used to calculate energy levels,excitation energies, and oscillator strengths for 3d np, 3d nf, and 4s npautoionizing transitions from the ground and metastable states. Withinthe experimental uncertainty, oscillator strengths determined from thephotoionization measurements are in agreement with both calculations.Excitation-autoionization and resonant excitation-double-autoionizationfeatures are evident in the electron-impact ionization crosssection.
  • Absolute cross sections for photoionization andelectron-impact Photionization of Ar5+ have been measuredusing twodifferent interacting-beams setups. The spectra consist of measurementsof the yield of products dueto single ionization as a function ofelectron or photon energy. In addition, absolute photoionization andelectron-impact ionization cross sections were measured to normalize themeasured Ar6+ product-ion yield spectra. In the energy range from 90 to111 eV, both electron-impact ionization and photoionization of Ar5+aredominated by indirect 3s subshell excitation-autoionization. In theenergy range from 270 to 285 eV, resonances due to 2p-3dexcitation-autoionization are prominent in the photoionization spectrum.In the range from 225 to 335 eV, an enhancement due tomore » 2p-nl (n>2>excitations are evident in the electron-impactionization cross section.The electron and photon impact data show some features due to excitationof the same intermediate autoionizing states.« less