Lifetimes of thens1np62S1/2states of singly ionized argon, krypton and xenon

Lauer, S.; Liebel, H; Vollweiler, F.; Schmoranzer, H.; Lagutin, B. M.; Demekhin, Ph. V.; Petrov, I. D.; Sukhorukov, V. L.

doi:10.1088/0953-4075/32/8/319

Cited by 35 publications

(34 citation statements)

References 33 publications

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“…The reliability of their data was confirmed by recent B-spline calculations of . The oscillator strengths for Kr II were derived from the selective pulsed monochromatized synchrotron radiation experiment of Lauer et al (1999), where lifetimes of the 4s4p 6 2 S 1/2 states were measured. For the Kr VI line, we list data from MCHF relativistic calculations of Pagan et al (1996), where adjustments were made to the electrostatic parameters in order to improve theoretical level energies and gf -values.…”

Section: Krypton Speciesmentioning

confidence: 99%

Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter

Cashman

Kulkarni

Kisielius

et al. 2017

ApJS

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Measurements of element abundances in galaxies from astrophysical spectroscopy depend sensitively on the atomic data used. With the goal of making the latest atomic data accessible to the community, we present a compilation of selected atomic data for resonant absorption lines at wavelengths longward of 911.753Å (the H I Lyman limit), for key heavy elements (heavier than atomic number 5) of astrophysical interest. In particular, we focus on the transitions of those ions that have been observed in the Milky Way interstellar medium (ISM), the circumgalactic medium (CGM) of the Milky Way and/or other galaxies, and the intergalactic medium (IGM). We provide wavelengths, oscillator strengths, associated accuracy grades, and references to the oscillator strength determinations. We also attempt to compare and assess the recent oscillator strength determinations. For about 22% of the lines that have updated oscillator strength values, the differences between the former values and the updated ones are 0.1 dex. Our compilation will be a useful resource for absorption line studies of the ISM, as well as studies of the CGM and IGM traced by sight lines to quasars and gamma-ray bursts. Studies (including those enabled by future generations of extremely large telescopes) of absorption by galaxies against the light of background galaxies will also benefit from our compilation.

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Section: Krypton Speciesmentioning

confidence: 99%

Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter

Cashman

Kulkarni

Kisielius

et al. 2017

ApJS

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“…Indeed, in VUV spectra taken by one of us (HODR) and Dr. Persson at the University of Lund, the experimental intensities were inconsistent with the measurements of Boyce, used by Hansen-Persson in their work about the spectrum of Xe II. Because of this, we indicates the theoretical values of the ratio 5s5p 6 − 2 P 3/2 /5s5p 6 [18]. The LSF value obtained by Hansen and Persson is 32.1 ns; using the same set of configurations, the ab initio value resulted in 21 ns.…”

Section: Results and Tablesmentioning

confidence: 89%

“…Our work is, in part, an attempt to give an answer to this discrepancy. On the other hand, the lifetime for the 5s5p 6 2 S 1/2 was measured very recently by Lauer et al [18] using synchrotron radiation; also theoretical calculations using a CI method were carried out. Their value and the one by Rosenberg et al [19] correspond between them within the limit of twice the quoted experimental uncertainties.…”

Section: Experimental Informationmentioning

confidence: 99%

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Lifetimes and transition probabilities of Xe II: Experimental measurements and theoretical calculations

Rocco¹,

Iriarte²,

Pomarico³

2000

The European Physical Journal D

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In this work we make an experimental and theoretical investigation of transition probabilities (A) and lifetimes (τ ) of Xe II. Eighteen Aij's corresponding to the 6p-6d array were measured using a Laser Produced Plasma (LPP) as the spectroscopic source. The ab initio (AI) and Least Square Fitting (LSF) approaches were used to calculate the atomic parameters. Relativistic corrections and Configuration Interaction (CI) effects have been taken into account using the HFR approach described by Cowan. Whereas the AI parameters corresponding to 6p levels are not very affected by CI effects, several of the 6d levels with J = 1/2, 3/2 and 5/2 making transitions to the fundamental levels 5p 5 2 P 1/2,3/2 are affected by CI effects due to both, discrete nd and continuum d states, modifying their lifetimes values. An extensive comparison with other measurements and calculations are made. In particular, concerned with branching ratio and forbidden transitions.

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“…At the equilibrium Kr-Kr distance (R eq Kr 2 = 4.0Å [20]), the collective decay width reaches 1.9 meV for triplet and 2.0 meV for singlet doubly ionized states, which corresponds to life times around 300 fs. The predicted life time is five orders of magnitude shorter than the one of the radiative decay [21] which means that the process is not suppressed by photon emission. The enhancement of the singlet width around R = 4.9Å is due to the interaction with the singlet PES of the (4s −1 , 4p −1 )Kr 2+ Kr type.…”

Section: Krmentioning

confidence: 88%

Collective Interatomic Decay of Multiple Vacancies in Clusters

Averbukh

Kolorenč²

2009

Phys. Rev. Lett.

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We predict that inner-shell ionization of more than one atom (or molecule) in a cluster, e.g. by intense free electron laser radiation, can lead to an inter-atomic decay process in which the formed vacancy states decay simultaneously, while a neighboring neutral species is ionized. This collective decay phenomenon can be regarded as a transfer of two or more virtual photons from the ionized cluster units to a neutral one. Simulations of collective decay in (4s −1 , 4s −1 ) (Kr + ) 2 Ar show that the two-virtual-photon process can be competitive with the dissociative nuclear dynamics of the doubly ionized cluster. Generality of the collective inter-atomic decay and especially its relevance for clusters of organic molecules is discussed.

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Lifetimes of thens¹np⁶²S_1/2states of singly ionized argon, krypton and xenon

Cited by 35 publications

References 33 publications

Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter

Atomic Data Revisions for Transitions Relevant to Observations of Interstellar, Circumgalactic, and Intergalactic Matter

Lifetimes and transition probabilities of Xe II: Experimental measurements and theoretical calculations

Collective Interatomic Decay of Multiple Vacancies in Clusters

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