He-like hole states in mid-Z atoms studied by high-resolution K X-ray spectroscopy

Rzadkiewicz, J.; Chmielewska, D.; Ludziejewski, T.; Rymuza, P.; Sujkowski, Z.; Castella, D.; Corminboeuf, D.; Dousse, J.‐Cl.; Galley, B.; Herren, Ch.; Hoszowska, J.; Kern, J.; Polasik, M.; Pajek, M.

doi:10.1016/s0375-9601(99)00814-2

Cited by 12 publications

(9 citation statements)

References 15 publications

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“…The average numbers of the M-shell holes at the moment of the emission of the diagram and hypersatellite X-ray lines were assumed to be approximately the same. Actually, MCDF calculations show that the average energy shifts of diagram and hypersatellite lines due to one additional M-shell hole are almost the same (maximum difference is $0.12 eV) [10], whereas two additional M-shell holes cause different average shifts of the Ka and K h a lines (maximum difference is $1.3 eV). Therefore, if the M-shell ionization probability is low, one can find a correction for the broadening of the X-ray lines by the determination of the Gaussian widths (corresponding to the instrumental response and broadening due to the multiple M-shell ionization) of the diagram Ka 1 lines in the heavy-ions induced X-ray spectra.…”

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confidence: 99%

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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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confidence: 99%

“…The K h aL 0 lines correspond to the deexcitation of initial states with two K-shell holes and a closed L-shell (i.e. He-like hole states [10]). The M-shell satellites due to the additional M-shell ionization cannot be resolved from the KaL 0 nor the K h aL 0 lines because the energy shifts are smaller than the natural widths.…”

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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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“…Heavy hollow atoms provide a unique opportunity to study angular momentum coupling and electron-electron correlation in an exotic regime, where the Breit interaction and relativistic effects play a more pronounced role than in light atoms [3][4][5]. They are also ideal medium for investigating exotic decay modes, such as the hypersatellite transitions [6], the hypersatellite Auger process [7,8], the two-electron one-photon (TEOP) transitions [9], the three-electron Auger process [10], as well as the dynamics of violent collisions [11,12]. In addition to their interest for fundamental atomic physics, production mechanisms and decay properties of such atoms are also important for high energy density plasma [13,14], hard x-ray laser [15], and molecule imagining [16,17] research.…”

Section: I．introductionmentioning

confidence: 99%

Production and decay of K -shell hollow krypton in collisions with 52–197-MeV/u bare xenon ions

Shao

et al. 2017

Phys. Rev. A

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X-ray spectra of K-shell hollow krypton atoms produced in single collisions with 52 -197 MeV/u Xe 54+ ions are measured in a heavy-ion storage ring equipped with an internal gas-jet target. Energy shifts of the 𝐾𝛼 1,2 𝑠 , 𝐾𝛼 1,2 ℎ,𝑠 , and 𝐾𝛽 1,3 𝑠 transitions are obtained. Thus, the average number of the spectator L-vacancies presented during the x-ray emission is deduced. From the relative intensities of the 𝐾𝛼 1,2 𝑠and 𝐾𝛼 1,2 ℎ,𝑠 transitions, the ratio of K-shell hollow krypton to singly K-shell ionized atoms is determined to be 14 -24%. In the considered collisions, the K-vacancies are mainly created by the direct ionization which cannot be calculated within the perturbation descriptions. The experimental results are compared with a relativistic coupled channel calculation performed within the independent particle approximation.

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“…High-resolution measurements of such spectra [1][2][3][4] give direct access to information on the natural width of the hypersatellite lines and the lifetimes of the K -shell hollow (i.e. doubly K -shell ionized) atoms.…”

Section: Introductionmentioning

confidence: 99%

Lifetimes of doublyK-shell ionized states

et al. 2011

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The present work provides a reliable interpretation of the K h α 1 /K h α 2 intensity ratios and an explanation of the lifetime values for K -shell hollow atoms based on an advanced theoretical analysis (using extensive multiconfiguration Dirac-Fock calculations with the inclusion of the transverse Breit interaction and quantum electrodynamics corrections). It was found that, as a result of closing the K h α 1 de-excitation channel in the pure LS coupling scheme, the K h α 1 /K h α 2 intensity ratio changes with the atomic number from small values (for the LS coupling limit at low Z ) to about 1.5-1.6 (for the j-j coupling limit at high Z ). However, closing the K h α 1 de-excitation channel (due to the domination of the pure LS coupling for the low-Z atoms) does not enlarge the lifetimes of hollow atoms.

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He-like hole states in mid-Z atoms studied by high-resolution K X-ray spectroscopy

Cited by 12 publications

References 15 publications

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

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

Production and decay of K -shell hollow krypton in collisions with 52–197-MeV/u bare xenon ions

Lifetimes of doublyK-shell ionized states

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