Beam-foil Spectra of Chlorine and Oxygen Ions at Beam Energies of 6-42 MeV

Abstract

Beam-foil spectra of chlorine and oxygen ions at beam energies of 6-42 M e V .

Hydrogenic Transitions in Multiply Charged Fe and Ni Ions

“…We list transitions for t:..n = 1, 2, and 3, although t:..n = 3 transitions in heavy ions are rare. 14 …”

Excitation of Swift Heavy Ions in Foil Targets: Visible Radiation from Fe, Ni and Cu

“…The data collection process was similar to that described earlier by Hay and Newton (1980), which involves the counting and recording of output pulses from the photomultiplier, beam charge digitizer, scattered-particle detector and a 100 Hz clock in multi scaling mode with channel advance controlled by the monochromator wavelength readout. The photomultiplier spectrum per o· 5 nm of wavelength was normalized to the number of incident beam particles and allowance was made for the background counting rate of approximately 25 per minute.…”

“…It is well known that, as a result of transmission through foil targets, heavy ions of 1-10 MeV show Rydberg transitions (Lennard et al 1972;Hallin et al 1973;Bashkin 1976;McIntyre et al 1976;Bashkin et al 1978). These transitions are defined (Greenland 1981) as radiative transitions between states of a single electron outside a charged core, and may in general be described by the Ritz series formula with an effective charge q and effective (non-integral!)…”

“…may be excited by foils. Lennard and Cocke (1973) have argued that a likely mechanism is via electron capture at the foil exit surface. This capture is expected to follow the Oppenheimer (1928) n-3 law, as has been observed (Lennard and Cocke 1973;Bukow et al 1976).…”

“…Lennard and Cocke (1973) have argued that a likely mechanism is via electron capture at the foil exit surface. This capture is expected to follow the Oppenheimer (1928) n-3 law, as has been observed (Lennard and Cocke 1973;Bukow et al 1976). Confirmation of yrast cascading such as that predicted by Betz (1976) has not been directly observed and, of course, its observation would be obscured by the effects of direct feeding and by uncertainties in spectrometer calibrations.…”