High-resolution study of heavy-ion-induced K<i>α</i>x-ray spectra of molybdenum atoms

Perny, B.; Dousse, J.-Cl.; Gasser, Martin; Kern, J.; Rhéme, Ch.; Rymuza, P.; Sujkowski, Z.

doi:10.1103/physreva.36.2120

Cited by 47 publications

(25 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…FWHM of the Gaussian shape for K,L ° and K~L" (n>0) are 24 eV and 44 eV, respectively. The instrumental energy resolution (FWHM for 7-line) was about 9 eV at 21 keV adjustments were performed in the 46Pd experiment resulting in a slight improvement of the resolution compared with the earlier 42M0 data of [7]. Figure 1 shows a 46Pd spectrum measured on the left side in first order of reflection.…”

Section: Experiments and Resultsmentioning

confidence: 97%

“…The instrumental line shape was obtained from the 25.7 keV 7-line from the 16~Tb source measured in the first order of reflection. As mentioned in [7] the optimal slit-to-crystal distance has to be varied slightly with energy in order to fulfill correct focusing conditions. The changes can be neglected within the range of the K~ X-ray spectrum but should be taken into account then rotating the spectrometer from the X-ray to the calibration line region.…”

Section: Experiments and Resultsmentioning

confidence: 99%

“…Instrumental resolution was 9 eV at 21 keV, corresponding to an angular width (FWHM) of about 11 arcsec, of the diffraction lines. The experimental details and the results of the molybdenum K~ X-ray spectra measurements were reported in a previous paper [7]. The measurements for palladium were carried out twice on each side of reflection as a check for instrumental instabilities and asymmetries.…”

Section: Experiments and Resultsmentioning

confidence: 99%

“…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%

See 3 more Smart Citations

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Experiments and Resultsmentioning

confidence: 97%

Section: Experiments and Resultsmentioning

confidence: 99%

Section: Experiments and Resultsmentioning

confidence: 99%

Section: Experiments and Resultsmentioning

confidence: 99%

See 2 more Smart Citations

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…In most of them the radiation source was no longer a γ -ray radioactive source as used by DuMond but a solid, liquid, or gaseous sample placed in the beam line of a nuclear reactor or particle accelerator. Laue-type crystal spectrometers have been installed at nuclear reactors for, e.g., high-resolution n-γ spectroscopy experiments 17 and at particle accelerators for the study of, e.g., (α, xnγ ) nuclear reactions, 18 heavy-ion induced multiple atomic innershell ionization, [19][20][21] or X-rays from muonic 22 and pionic atoms. 23 More recently, the advent of third generation synchrotron radiation (SR) facilities and X-ray free electron laser (XFEL) sources have given a new boost to the domain and many XES (X-ray emission spectroscopy) and RIXS (resonant inelastic X-ray scattering) experiments have been carried out at such facilities using crystal spectrometers.…”

Section: Introductionmentioning

confidence: 99%

High-resolution Laue-type DuMond curved crystal spectrometer

Szlachetko

Berset

Dousse

et al. 2013

Review of Scientific Instruments

Self Cite

View full text Add to dashboard Cite

We report on a high-resolution transmission-type curved crystal spectrometer based on the modified DuMond slit geometry. The spectrometer was developed at the University of Fribourg for the study of photoinduced X-ray spectra. K and L X-ray transitions with energies above about 10 keV can be measured with an instrumental resolution comparable to their natural linewidths. Construction details and operational characteristics of the spectrometer are presented. The variation of the energy resolution as a function of the focal distance and diffraction order is discussed. The high sensitivity of the spectrometer is demonstrated via the 2s-1s dipole-forbidden X-ray transition of Gd which could be observed despite its extremely low intensity. The precision of the instrument is illustrated by comparing the sum of the energies of the Au K-L 2 and L 2 -M 3 cascading transitions with the energy of the crossover K-M 3 transition as well as by considering the energy differences of the Gd Kα 1 X-ray line measured at five different diffraction orders. Finally, to demonstrate the versatility of the spectrometer, it is shown that the latter can also be used for in-house extended X-ray absorption fine structure measurements.

show abstract

K X‐ray satellite structures of bromine and molybdenum

Natarajan

2020

X-Ray Spectrometry

View full text Add to dashboard Cite

The energies and electric dipole rates of Kα X‐ray satellites due to 1s‐2p transitions in bromine and molybdenum with one to five vacancies in the 2p shell and other shells retaining their normal occupation numbers are computed using Multi‐Configuration Dirac Fock wavefunctions with the inclusion of relativistic and quantum electrodynamic corrections. As fully relativistic calculations on all the Kα X‐ray fine structure satellites with multiple spectator vacancies in the 2p shell of elements under consideration, to the best of our knowledge, are reported in this work for the first time, the accuracy of the E1 data is analyzed in terms of the agreement between the rates in the length and velocity forms. While the intensities of the strong electric dipole lines in the various groups of 1s ‐ 2p transitions obey the well established Z dependence, many of the weak transitions vary randomly with Z and an attempt is made in this work to understand the behaviour of the spin‐forbidden and weak electric dipole lines in the KαL n X‐ray satellite structure of Br, Mo, I, and Au. As the number of closely spaced fine structure transitions range from a few to many depending on the spectator vacancies in the 2p shell, the intensity weighed statistical average satellite energies, line strengths and photo‐ionization cross sections are reported to guide in the reliable interpretation of experimental measurements.

show abstract

High-resolution study of heavy-ion-induced Kαx-ray spectra of molybdenum atoms

Cited by 47 publications

References 22 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

High-resolution Laue-type DuMond curved crystal spectrometer

K X‐ray satellite structures of bromine and molybdenum

Contact Info

Product

Resources

About