Multiple electron loss cross sections for heavy ions incident on various atomic and molecular gases. [Differential and total cross sections, charge exchange, 20 MeV]
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 were measured. Total cross sections for multiple electron loss were determined by integration of the differential charge state yields over angle. Cross sections will be 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 were 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 with the experimental total cross sections is shown. A different method, using a magnetic quadrupole to focus individual charge states, was used to measure absolute charge state yields of 20 MeV Fe ions emerging within a large acceptance angle from a differentially pumped gas cell of length 9.4 cm/sup 2/ N/sub 2/, Ar, Kr, Xe, and SF/sub 6/ targets were investigated. From the low pressure yields total cross sections for single and multiple electron loss were obtained using an improved version of the initial growth method. 18 references.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6376985
- Report Number(s):
- CONF-781113-28
- Country of Publication:
- United States
- Language:
- English
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Total electron-loss cross sections and absolute charge state yields of 20-MeV Fe ions transmitted through gaseous targets
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Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
ATOMIC IONS
CHARGE EXCHANGE
CHARGED PARTICLES
CHLORINE 35
CHLORINE IONS
CHLORINE ISOTOPES
COLLISIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
DIFFERENTIAL CROSS SECTIONS
ELECTRON LOSS
ELEMENTS
ENERGY RANGE
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IMPACT PARAMETER
INTERATOMIC FORCES
INTERMEDIATE MASS NUCLEI
IODINE 127
IODINE IONS
IODINE ISOTOPES
ION COLLISIONS
ION-ATOM COLLISIONS
ION-MOLECULE COLLISIONS
IONS
IRON IONS
ISOTOPES
KINETICS
KRYPTON
LIGHT NUCLEI
MEV RANGE
MEV RANGE 10-100
MOLECULE COLLISIONS
NITROGEN
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
RARE GASES
STABLE ISOTOPES
SULFUR COMPOUNDS
SULFUR FLUORIDES
TOTAL CROSS SECTIONS
XENON