Université de Fribourg

Hypersatellite x-ray decay of $3d$ hollow-$K$-shell atoms produced by heavy-ion impact

Maillard, Yves-Patrick ; Dousse, Jean-Claude ; Hoszowska, Joanna ; Berset, Michel ; Mauron, Olivier ; Raboud, Pierre-Alexandre ; Kavčič, Matjaz ; Rzadkiewicz, J. ; Banaś, Dariusz ; Tökési, K.

In: Physical Review A, 2018, vol. 98, no. 1, p. 012705

We report on the radiative decay of double K-shell vacancy states produced in solid Ca, V, Fe, and Cu targets by impact with about 10 MeV/amu C and Ne ions. The resulting K hypersatellite x-ray emission spectra were measured by means of high- energy-resolution spectroscopy using a von Hamos bent crystal spectrometer. The experiment was carried out at the Philips variable energy cyclotron of...

Université de Fribourg

High energy resolution measurements of the radiative decay of double K-shell vacancies in 20 ≤ Z ≤ 29 elements bombarded by fast C and Ne ions

Dousse, Jean-Claude ; Maillard, Yves-Patrick ; Berset, Michel ; Castella, D. ; Hoszowska, Joanna ; Kavčič, Matjaz ; Kobal, M. ; Mauron, Olivier ; Muehleisen, A. ; Raboud, Pierre-Alexandre ; Rzadkiewicz, J. ; Tökési, K. ; Zorko, B.

In: Journal of Physics: Conference Series, 2015, vol. 635, no. 2, p. 022054

We report on high energy resolution measurements of the Kα hypersatellite x-ray spectra of Ca, V, Fe and Cu induced by impact with 144 MeV C and 180 MeV Ne ions.

Université de Fribourg

Observation of internal structure of the L-shell x-ray hypersatellites for palladium atoms multiply ionized by fast oxygen ions

Czarnota, M. ; Banaś, D. ; Berset, Michel ; Chmielewska, D. ; Dousse, Jean-Claude ; Hoszowska, Joanna ; Maillard, Yves-Patrick ; Mauron, Olivier ; Pajek, M. ; Polasik, M. ; Raboud, Pierre-Alexandre ; Rzadkiewicz, J. ; Słabkowska, K. ; Sujkowski, Z.

In: Physical Review A, 2010, vol. 91, no. 06, p. 064702

An observation of the internal structure of the L-shell hypersatellite x rays resulting from the one-photon decay of L⁻² double-vacancy states in palladium multiply ionized by oxygen ions is reported. The Pd L₃→M4,5 x-ray spectrum was measured with a von Hamos high-resolution crystal spectrometer. The complex shape of the observed spectrum could be interpreted in detail using...

Université de Fribourg

Double K-shell ionization of Al induced by photon and electron impact

Fennane, Karima ; Dousse, Jean-Claude ; Hoszowska, Joanna ; Berset, Michel ; Cao, Wei ; Maillard, Yves-Patrick ; Szlachetko, Jakub ; Szlachetko, Monika ; Kavčič, M.

In: Physical Review A, 2009, vol. 79, no. 3, p. 032708

This paper reports on the investigation of the double K-shell ionization of metallic aluminum induced by photon and electron impact. The experimental method consisted to measure the Kα hypersatellite spectra resulting from the radiative decay of double 1s vacancy states by means of high-resolution x-ray spectroscopy using a Bragg-type von Hamos crystal spectrometer....

Université de Fribourg

Double-K-shell ionization of Mg and Si induced in collisions with C and Ne ions

Kobal, M. ; Kavčič, M. ; Budnar, M. ; Dousse, Jean-Claude ; Maillard, Yves-Patrick ; Mauron, Olivier ; Raboud, Pierre-Alexandre ; Tökési, K.

In: Physical Review A, 2004, vol. 70, p. 062720-62730

The satellite and hypersatellite K x-ray emission of a thin Mg foil and thick polycrystalline Si target bombarded by 34-MeV C and 50-MeV Ne ions was measured using high-resolution crystal diffractometry. The corresponding projectile reduced velocities v/vK were 1.09 and 0.92 for C ions and 1.02, 0.86 for Ne ions in case of Mg and Si targets, respectively. An energy resolution of approximately 0.5...