Portal de Periódicos da CAPES

Photon energy dependence of ionization-excitation in helium at medium energies

1997; IOP Publishing; Volume: 30; Issue: 2 Linguagem: Inglês

10.1088/0953-4075/30/2/004

1361-6455

R. Wehlitz, I. A. Sellin, O. Hemmers, S. B. Whitfield, P. Glans, H Wang, D. W. Lindle, B. Langer, N. Berrah, Jens Viefhaus, U. Becker,

Radiation Therapy and Dosimetry

We have measured the photoionization-excitation-to-photoionization ratio for (n = 2 - 6) at several photon energies from 90 to 900 eV. By extrapolating these values we could determine the asymptotic high-energy ratios for (n = 2 - 5) which agree with theoretical predictions. We show that the satellite-to-main-line ratios are consistent with experimental double-to-single photoionization ratios and agree well with recent measurements.