TY - JOUR
T1 - Absolute cross sections for electron-impact single ionization of Kr4+, Kr5+, and Kr7+ ions
AU - Bannister, M. E.
AU - Guo, X. Q.
AU - Kojima, T. M.
PY - 1994
Y1 - 1994
N2 - Absolute total cross sections for electron-impact single ionization of Kr4+, Kr5+, and Kr7+ ions have been measured using a crossed-beams technique from below threshold to 500, 400, and 500 eV, respectively, with absolute uncertainties of 12% or less. The measured cross sections are in good agreement with distorted-wave calculations and show significant contributions from excitation autoionization. Nonzero cross sections below threshold for the Kr4+ and Kr5+ ions suggest the presence of metastable ions in those two species that were extracted from an electron-cyclotron-resonance ion source. Such evidence of metastable ions was not found in the case of the Kr7+ ion measurment.
AB - Absolute total cross sections for electron-impact single ionization of Kr4+, Kr5+, and Kr7+ ions have been measured using a crossed-beams technique from below threshold to 500, 400, and 500 eV, respectively, with absolute uncertainties of 12% or less. The measured cross sections are in good agreement with distorted-wave calculations and show significant contributions from excitation autoionization. Nonzero cross sections below threshold for the Kr4+ and Kr5+ ions suggest the presence of metastable ions in those two species that were extracted from an electron-cyclotron-resonance ion source. Such evidence of metastable ions was not found in the case of the Kr7+ ion measurment.
UR - http://www.scopus.com/inward/record.url?scp=4244198149&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.49.4676
DO - 10.1103/PhysRevA.49.4676
M3 - Article
AN - SCOPUS:4244198149
SN - 1050-2947
VL - 49
SP - 4676
EP - 4681
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 6
ER -