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Electron-loss cross sections for 20-MeV Cl/sup 4 +/ and I/sup 5 +/ ions incident on thin gaseous targets: Experimental measurements and potential-model data analyses

Journal Article · · Phys. Rev., A; (United States)
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Differential cross sections for charge change resulting from the scattering of 20-MeV /sup 127/I/sup 5 +/ and 20-MeV /sup 35/Cl/sup 4 +/ ions from thin gaseous targets have been measured. Total cross sections for multiple-electron loss have been determined by integration of the differential charge-state yields over angle. Cross sections are presented for /sup 127/I/sup 5 +/ ions and /sup 35/Cl/sup 4 +/ ions on Xe, Ar, and N/sub 2/. Impact-parameter analyses of charge-fraction data have been performed; these analyses depend on the assumed interatomic potential but not on any absolute measurements. The applicability of Bohr, Thomas-Fermi, and Lenz-Jensen potentials was examined. The Bohr potential gave unsatisfactory fits to the directly measured cross sections for all observed collisions with impact parameters greater than about three times the screening radius. For the cases reported here, the Thomas-Fermi and Lenz-Jensen potentials tend to give underestimates of the total cross sections, probably because they do not take into account the ionized nature of the collisions partners.

Research Organization:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
OSTI ID:
6501157
Journal Information:
Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 18:6; ISSN PLRAA
Country of Publication:
United States
Language:
English

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Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
ATOMIC IONS
CHARGE EXCHANGE
CHARGED PARTICLES
CHLORINE IONS
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DIFFERENTIAL CROSS SECTIONS
ELECTRON LOSS
ELEMENTS
ENERGY RANGE
FLUIDS
INTERATOMIC FORCES
IODINE IONS
ION COLLISIONS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
IONS
MEV RANGE
MEV RANGE 10-100
MOLECULE COLLISIONS
MULTICHARGED IONS
NITROGEN
NONMETALS
RARE GASES
XENON