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Photoionization and electron-impact ionization of Ar5+

Journal Article · · Physical Review A
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 to 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.
Research Organization:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US); Advanced Light Source(ALS)
Sponsoring Organization:
USDOE Director. Office of Science. Basic EnergySciences
DOE Contract Number:
AC02-05CH11231
OSTI ID:
932483
Report Number(s):
LBNL--62916; BnR: KC0204016
Journal Information:
Physical Review A, Journal Name: Physical Review A Vol. 75; ISSN 1050-2947; ISSN PLRAAN
Country of Publication:
United States
Language:
English

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