Properties of cold ions produced by synchrotron radiation and by charged particle impact

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7049507

Levin, J C; Biederman, C; Cederquist, H; O, C S; Short, R T; Sellin, I A

Argon recoil ions produced by beams of 0.8 MeV/u Cl/sup 5 +/ have been detected by time-of-flight (TOF) techniques in coincidence with the loss of from one to five projectile electrons. Recoil-ion energies have been determined to be more than an order of magnitude higher than those of highly-charged ions produced by unmonochromatized synchrotron radiation. Charge-state distributions, however, show similarities, suggesting that loss of projectile electrons corresponds, in some cases, to inner-shell target ionization producing vacancy cascades. In an essential improvement to the usual multinomial description of ionization in the independent-electron-ejection model, we find the inclusion of Auger vacancy cascades significantly alters the description of the recoil ion spectra corresponding to projectile-electron loss. These conclusions are consistent with impact parameters inferred from determinations of mean recoil energy. 11 refs., 5 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7049507
• Report Number(s): CONF-881151-34; ON: DE89002331
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
ATOM COLLISIONS
BEAMS
BREMSSTRAHLUNG
CHARGED PARTICLES
CHLORINE IONS
COLLISIONS
DATA
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
INFORMATION
ION BEAMS
ION COLLISIONS
ION SPECTROSCOPY
ION-ATOM COLLISIONS
IONIZATION
IONS
NUMERICAL DATA
PHOTOIONIZATION
RADIATIONS
SPECTROSCOPY
SYNCHROTRON RADIATION
TIME-OF-FLIGHT METHOD