Dumond curved crystal spectrometer for in-beam X- and gamma-ray spectroscopy

Perny, B.; Dousse, J.‐Cl.; Gasser, Martin; Kern, J.; Lanners, Romain; Rhéme, Ch.; Schwitz, W.

doi:10.1016/0168-9002(88)90636-5

Cited by 38 publications

(9 citation statements)

References 25 publications

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“…The values obtained are 88 MeV (~5.5 MeV/u) for 42Mo and 87 MeV (~ 5.4 MeV/u) for 46Pd targets, respectively. The K X-ray spectra were recorded with a 3.15 m radius bent-crystal spectrometer of the Du Mond slit geometry [6,7]. The (110) reflecting plane of a 1.5 mm thick quartz lamina were used in first order of reflection.…”

Section: Experiments and Resultsmentioning

confidence: 99%

Distribution ofK α L n satellite yields for mediumZ elements bombarded with16O ions

Rymuza

Sujkowski

Carlen

et al. 1989

Z Phys D - Atoms, Molecules and Clusters

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K s X-ray spectra were measured with a Du Mond type curves crystal spectrometer for 42Mo and 46Pd targets bombarded with oxygen ions at 5.5 MeV/u energy (i.e. at velocity closely matching those of the target L-shell electrons). The distribution of L-shell vacancies produced in collisions with simultaneous K-shell ionization is deduced from the measured yield distribution of the K~ X-ray satellites. The distribution shows deviations from the binomial ones. The deviations can be accounted for by assuming that the L-shell vacancy production is due to two uncorrelated processes: the direct ionization by impact and the electron capture from the L-shell of the target atom into the K-shell of the projectile, both occurring at nearly central collisions. The corresponding probability values are deduced using simple statistical considerations.

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Section: Experiments and Resultsmentioning

confidence: 99%

Distribution ofK α L n satellite yields for mediumZ elements bombarded with16O ions

Rymuza

Sujkowski

Carlen

et al. 1989

Z Phys D - Atoms, Molecules and Clusters

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“…The experimental setup has been described in detail elsewhere [13]. The X-ray spectra were recorded with an in-beam bent crystal spectrometer in a modified DuMond slitgeometry.…”

Section: Methodsmentioning

confidence: 99%

“…Using a high resolution crystal spectrometer in DuMond geometry [13], we were able to separate the diagram K X-ray lines and the L-and M-satellite transitions for a Mo target bombarded with 4He ions. The ionization probabilities were deduced from the measured satellite intensity ratios.…”

Section: * Dedicated To Peter Armbruster On the Occasion Of His 60th mentioning

confidence: 99%

Inner-shell ionization in near-central collisions of 6.7 MeV/amu4He ions with mid-Z atoms

Carlen

Dousse

Gasser

et al. 1992

Z Phys D - Atoms, Molecules and Clusters

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Abstract. The K[3 spectra of molybdenum, palladium and lanthanum bombarded by 6.7 MeV/amu 4He ions were measured with a transmission curved crystal spectrometer. L and M satellite lines were observed and resolved. Experimental energies are compared with those calculated with a MCDF program. M-shell ionization probabilities are deduced from the measured satellite intensity ratios and compared with theoretical (SCA) predictions.The experimental values are found to be higher than the calculated ones (by a factor of 2 for La and a factor of about 4 for Mo and Pd). The influence of coupling effects, electron wave functions, electron capture, electron correlation and target activation is discussed.

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“…The high-resolution measurements of the Ka spectra were performed with an on-line transmission-type curved crystal spectrometer [7]. A 0.15 mm-wide rectangular slit, located on the Rowland circle, 2 cm in front of the target, served as the effective source of radiation.…”

mentioning

confidence: 99%

Natural widths of hypersatellite K-X-ray lines and lifetimes of double K-hole states in mid-Z atoms

Rzadkiewicz

Chmielewska

Sujkowski

et al. 2005

Nuclear Instruments and Methods in Physics Research Section B:

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K-X-ray spectra of Zr, Nb, Mo and Pd targets bombarded with 250 MeV carbon and 360 MeV oxygen ions are studied with high resolution diffraction spectrometry. Relative yields and natural widths of the K h a 1,2 hypersatellite lines are determined and compared with those of the diagram lines. The widths of K h a 1,2 lines are compared with the new phenomenological formula which takes into account the retardation of the K h a 1 transition in the LS coupling scheme. The data significantly exceed the expected values. Deduced lifetimes of the double K-hole states are shorter than expected.

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Dumond curved crystal spectrometer for in-beam X- and gamma-ray spectroscopy

Cited by 38 publications

References 25 publications

Distribution ofK α L n satellite yields for mediumZ elements bombarded with16O ions

Distribution ofK α L n satellite yields for mediumZ elements bombarded with16O ions

Inner-shell ionization in near-central collisions of 6.7 MeV/amu4He ions with mid-Z atoms

Natural widths of hypersatellite K-X-ray lines and lifetimes of double K-hole states in mid-Z atoms

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