Selective production of the doubly excited<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>2</mml:mn><mml:msup><mml:mi>p</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math>(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mn>1</mml:mn></mml:msup><mml:mspace width="-0.16em" /><mml:mi>D</mml:mi></mml:mrow></mml:math>) state in He-like Ar<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" disp

Nakano, Yuji; Suda, Seiichi; Hatakeyama, A.; Nakai, Yutaka; Komaki, K.; Takada, E.; Murakami, Takeshi; Azuma, T.

doi:10.1103/physreva.85.020701

Cited by 14 publications

(6 citation statements)

References 19 publications

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“…The doubly excited states of helium-like ions have also been investigated in various experiments (O'Rourke et al 2008;Nandi 2008;Nakano et al 2012;Kasthurirangan et al 2013). The newly developed X-ray free-electron lasers (FEL) provide a unique opportunity to investigate the behavior of inner-shell vacancy ions (Young et al 2010;Bucksbaum et al 2011;Düsterer et al 2011;Kanter et al 2011;Meyer et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Energy levels and transition rates for helium-like ions withZ = 10–36

Guo

Wang

et al. 2016

A&A

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Aims. Helium-like ions provide an important X-ray spectral diagnostics in astrophysical and high-temperature fusion plasmas. An interpretation of the observed spectra provides information on temperature, density, and chemical compositions of the plasma. Such an analysis requires information for a wide range of atomic parameters, including energy levels and transition rates. Our aim is to provide a set of accurate energy levels and transition rates for helium-like ions with Z = 10-36. Methods. The second-order many-body perturbation theory (MBPT) was adopted in this paper. To support our MBPT results, we performed an independent calculation using the multiconfiguration Dirac-Hartree-Fock (MCDHF) method. Results. We provide accurate energies for the lowest singly excited 70 levels among 1snl (n ≤ 6, l ≤ (n − 1)) configurations and the lowest doubly excited 250 levels arising from the K-vacancy 2ln l (n ≤ 6, l ≤ (n − 1)) configurations of helium-like ions with Z = 10−36. Wavelengths, transition rates, oscillator strengths, and line strengths are calculated for the E1, M1, E2, and M2 transitions among these levels. The radiative lifetimes are reported for all the calculated levels. Conclusions. Our MBPT results for singly excited n ≤ 2 levels show excellent agreement with other elaborate calculations, while those for singly excited n ≥ 3 and doubly excited levels show significant improvements over previous theoretical results. Our results will be very helpful for astrophysical line identification and plasma diagnostics.

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Section: Introductionmentioning

confidence: 99%

Energy levels and transition rates for helium-like ions withZ = 10–36

Guo

Wang

et al. 2016

A&A

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“…The high energy beams available at FAIR will allow to extend the range of transition energy measurements to much heavier elements, with transition energies up to 100 keV. The recent improvement of this method with 3D-RCE will allow for simpler measurements [151].…”

Section: Fair -Atomic Physics From Microkelvin To Petakelvinmentioning

confidence: 99%

All the Fun of the FAIR: Fundamental physics at the Facility for Antiproton and Ion Research

Durante,

Indelicato,

Jonson

et al. 2019

Preprint

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“…It means that such plasma hollow ions will be created independently on the ion pulse duration (see for example, Moribayashi et al, 2001a). The ion energy for effective ionization of inner atom electrons must be higher than the energy of fast electrons, of course, but the experiments, carried out at the different accelerators, showed that energy of nowadays used heavy projectile ions are enough for ionization of the K-electrons in the different atoms (see, for example, MacFarlane et al, 1993;Rosmej et al, 2002;Rosmej, O. et al, 2003;2005b;2005a;Pikuz et al, 2006;Rzadkiewicz et al, 2010;Kawamura et al, 2011;McMahon et al, 2011;Nakano et al, 2012).…”

Section: Emission Of Hollow Ions Spectra In High-temperature Plasma Wmentioning

confidence: 99%

Diagnostics of warm dense matter by high-resolution X-ray spectroscopy of hollow ions

et al. 2014

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The short review on the possible applications of the hollow ion spectra for the diagnostics of the high-temperature plasma created by intensive laser and particle beams is presented. Because of the hollow ion spectra features are defined mainly by the mechanisms of their excitation, we consider the various types of the high-temperature plasma where different excitation processes are important. It is shown that like ordinary spectral lines, spectra of the hollow ions offer considerable diagnostic opportunities. At the present time, hollow ion spectra are used mainly to investigate plasma heated by X-ray radiation, but the hollow ions must be generated when plasma is heated by fast heavy ion beams too. In this case, the resultant substance state will be also characterized by solid-state density, and some spatial regions of targets will have relatively low temperatures, i.e., will be a nonideal plasma. It is emphasized that hollow ion spectra are promising diagnostic tool for both nonideal plasma and warm dense matter.

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Selective production of the doubly excited2p2(1D) state in He-like Ar

Cited by 14 publications

References 19 publications

Energy levels and transition rates for helium-like ions withZ = 10–36

Energy levels and transition rates for helium-like ions withZ = 10–36

All the Fun of the FAIR: Fundamental physics at the Facility for Antiproton and Ion Research

Diagnostics of warm dense matter by high-resolution X-ray spectroscopy of hollow ions

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