Rlsum6.- Les spectres de rayons X Ka du molybdene (2=42), , palladium. (Z=46) et holmium (2-67) bombard& par des ions de 4He (6.5 MeV/amu) et de 1 6 0 ...
JOURNAL DE PHYSIQUE Colloque C9, suppl6ment au n012, Tome 48, dgcembre 1987
HIGH-RESOLUTION STUDY OF Ka X-RAY SPECTRA INDUCED IN MID-Z ATOMS BY LIGHT HEAVY IONS
J.-C. DOUSSE, M. CARLEN, M. GASSER, J. KERN, B. PERNY, C. R H ~ M E , P. RYMUZA* and Z. SUJKOWSKI* P h y s i c s Department o f t h e U n i v e r s i t y , CH-1700 F r i b o u r g , Switzerland * ~ n s t i t u t efor N u c l e a r S t u d i e s , PL-05-400 S w i e r k , Poland Rlsum6.- Les spectres de rayons X Ka du molybdene ( 2 = 4 2 ) , , palladium (Z=46) et holmium (2-67) bombard& par des ions de 4He (6.5 MeV/amu) et de 1 6 0 (5.5 MeV/amu) ont bt6 mesur6s au moyen d'un spectrometre A cristal incurve de transmission du type DuMond install6 aupres du cyclotron A Bnergie variable du SIN (Villigen, Suisse). Grace a la resolution &levee du spectrometre et A sa bonne sensibilit6, les lignes principales Kal et Ka2 et leurs satellites K a l L n = 1 $ 2 * 3et KazLn=l?z ont pu Btre observes et rbsolus pour la premiere fois dans des atomes mi-lourds. Les knergies, largeurs et intensit& relatives des lignes observees sont commentOes dans l'article. Abstract.- The Ka x-ray spectra of molybdenum (Z=42), palladium (Z=46) and holmium (2=67) bombarded with 6.5 MeV/amu He and 5.5 MeV/amu 1 6 0 ions were recorded with an on-line bent crystal spectrometer in DuMond geometry installed at the SIN variable energy cyclotron (Villigen, Switzerland). Thanks to the high resolution and the good sensitivity of the instrument, KalLn=O*l P 2 * and K a ~ L ~ = ~ , i p ~ principal and satellite lines were observed and resolved for the first time for atoms in the mid-Z region. The energies, line-widths and relative yields were determined and are discussed in the paper. Multiple inner-shell ionization of atoms bombarded by heavy ions has been a subject of increasing interest during the last decade. The interest is stirred by some fundamental problems concerning the mechanism of the reaction itself as well as by a number of possible applications in astrophysics, plasma physics, surface physics or nuclear physics. The observation of enhanced satellite structure in heavy-ion-induced x-ray spectra has proved to be a very powerful tool for studying multiple inner-shell ionization phenomena. This has led during the last years to a large number of such high-resolution x-ray measurements 11-51. Experimental data, however, are limited practically to light elements (Z
