Photoionization of Ne Atoms and Ne + Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections

Müller, Alfred; Bernhardt, Dietrich; Borovik, Alexander; Buhr, Ticia; Hellhund, Jonas; Holste, Kristof; Kilcoyne, A. L.  David; Klumpp, Stephan; Martins, Michael; Ricz, Sandor; Seltmann, Jörn; Viefhaus, Jens; Schippers, Stefan

doi:10.3847/1538-4357/836/2/166

Title: Photoionization of Ne Atoms and Ne ⁺ Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections

Abstract

Single, double, and triple photoionization of Ne ⁺ ions by single photons have been investigated at the synchrotron radiation source PETRA III in Hamburg, Germany. Absolute cross-sections were measured by employing the photon-ion merged-beams technique. Photon energies were between about 840 and 930 eV, covering the range from the lowest-energy resonances associated with the excitation of one single K-shell electron up to double excitations involving one K- and one L-shell electron, well beyond the K-shell ionization threshold. Also, photoionization of neutral Ne was investigated just below the K edge. The chosen photon energy bandwidths were between 32 and 500 meV, facilitating the determination of natural line widths. The uncertainty of the energy scale is estimated to be 0.2 eV. For comparison with existing theoretical calculations, astrophysically relevant photoabsorption cross-sections were inferred by summing the measured partial ionization channels. Discussion of the observed resonances in the different final ionization channels reveals the presence of complex Auger-decay mechanisms. The ejection of three electrons from the lowest K-shell-excited Ne ⁺ (1s2s²p⁶ ²S_1/2) level, for example, requires cooperative interaction of at least four electrons.

Authors:

^[1]; Bernhardt, Dietrich ^[1]; Borovik, Alexander ^[2]; Buhr, Ticia ^[2]; Hellhund, Jonas ^[1]; Holste, Kristof ^[2]; Kilcoyne, A. L. David ^[3]; Klumpp, Stephan ^[4]; Martins, Michael ^[5]; Ricz, Sandor ^[6]; Seltmann, Jörn ^[7]; Viefhaus, Jens ^[7];

^[2]

Justus-Liebig Univ., Giessen (Germany). Inst. of Atomic and Molecular Physics (IAMP)
Justus-Liebig Univ., Giessen (Germany). Inst. of Atomic and Molecular Physics (IAMP), Physical Inst.
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
Univ. of Hamburg (Germany). Inst. for Experimental Physics; Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Photon Science
Univ. of Hamburg (Germany). Inst. for Experimental Physics
Inst. of Nuclear Research of the Hungarian Academy of Sciences, Debrecen (Hungary)
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Photon Science

Publication Date:: Fri Feb 17 00:00:00 EST 2017

Research Org.:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1393123

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: The Astrophysical Journal (Online)

Additional Journal Information:: Journal Name: The Astrophysical Journal (Online); Journal Volume: 836; Journal Issue: 2; Journal ID: ISSN 1538-4357

Publisher:: Institute of Physics (IOP)

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; atomic data; atomic processes; ISM: atoms; line: identification; line: profiles; opacity

Citation Formats


                    Müller, Alfred, Bernhardt, Dietrich, Borovik, Alexander, Buhr, Ticia, Hellhund, Jonas, Holste, Kristof, Kilcoyne, A. L.  David, Klumpp, Stephan, Martins, Michael, Ricz, Sandor, Seltmann, Jörn, Viefhaus, Jens, and Schippers, Stefan. Photoionization of Ne Atoms and Ne + Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections.  United States: N. p., 2017. 
Web.  doi:10.3847/1538-4357/836/2/166.

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                    Müller, Alfred, Bernhardt, Dietrich, Borovik, Alexander, Buhr, Ticia, Hellhund, Jonas, Holste, Kristof, Kilcoyne, A. L.  David, Klumpp, Stephan, Martins, Michael, Ricz, Sandor, Seltmann, Jörn, Viefhaus, Jens, & Schippers, Stefan. Photoionization of Ne Atoms and Ne + Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections.  United States.  https://doi.org/10.3847/1538-4357/836/2/166

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                    Müller, Alfred, Bernhardt, Dietrich, Borovik, Alexander, Buhr, Ticia, Hellhund, Jonas, Holste, Kristof, Kilcoyne, A. L.  David, Klumpp, Stephan, Martins, Michael, Ricz, Sandor, Seltmann, Jörn, Viefhaus, Jens, and Schippers, Stefan. Fri .  
"Photoionization of Ne Atoms and Ne + Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections".  United States.  https://doi.org/10.3847/1538-4357/836/2/166.  https://www.osti.gov/servlets/purl/1393123.

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@article{osti_1393123,

  title        = {Photoionization of Ne Atoms and Ne + Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections},

  author       = {Müller, Alfred and Bernhardt, Dietrich and Borovik, Alexander and Buhr, Ticia and Hellhund, Jonas and Holste, Kristof and Kilcoyne, A. L.  David and Klumpp, Stephan and Martins, Michael and Ricz, Sandor and Seltmann, Jörn and Viefhaus, Jens and Schippers, Stefan},

  abstractNote = {Single, double, and triple photoionization of Ne + ions by single photons have been investigated at the synchrotron radiation source PETRA III in Hamburg, Germany. Absolute cross-sections were measured by employing the photon-ion merged-beams technique. Photon energies were between about 840 and 930 eV, covering the range from the lowest-energy resonances associated with the excitation of one single K-shell electron up to double excitations involving one K- and one L-shell electron, well beyond the K-shell ionization threshold. Also, photoionization of neutral Ne was investigated just below the K edge. The chosen photon energy bandwidths were between 32 and 500 meV, facilitating the determination of natural line widths. The uncertainty of the energy scale is estimated to be 0.2 eV. For comparison with existing theoretical calculations, astrophysically relevant photoabsorption cross-sections were inferred by summing the measured partial ionization channels. Discussion of the observed resonances in the different final ionization channels reveals the presence of complex Auger-decay mechanisms. The ejection of three electrons from the lowest K-shell-excited Ne + (1s2s2p6 2S1/2) level, for example, requires cooperative interaction of at least four electrons.},

  doi          = {10.3847/1538-4357/836/2/166},

  journal      = {The Astrophysical Journal (Online)},

  number       = 2,

  volume       = 836,

  place        = {United States},

  year         = {Fri Feb 17 00:00:00 EST 2017},

  month        = {Fri Feb 17 00:00:00 EST 2017}

}

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Works referencing / citing this record:

The photon‐ion merged‐beams experiment PIPE at PETRA III—The first five years
journal, April 2019

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Inner-shell X-ray absorption spectra of the cationic series NH _y ⁺ ( y = 0–3)
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Bari, Sadia; Inhester, Ludger; Schubert, Kaja
Physical Chemistry Chemical Physics, Vol. 21, Issue 30
DOI: 10.1039/c9cp02864a

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Schubert, Kaja; Guda, Alexander A.; Mertens, Karolin
Physical Chemistry Chemical Physics, Vol. 21, Issue 45
DOI: 10.1039/c9cp04640b

Photoabsorption of the molecular IH cation at the iodine $3 d$ absorption edge
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Klumpp, Stephan; Guda, Alexander A.; Schubert, Kaja
Physical Review A, Vol. 97, Issue 3
DOI: 10.1103/physreva.97.033401

Photoionization and photofragmentation of singly charged positive and negative ${Sc}_{3} N @ C_{80}$ endohedral fullerene ions
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Müller, A.; Martins, M.; Kilcoyne, A. L. D.
Physical Review A, Vol. 99, Issue 6
DOI: 10.1103/physreva.99.063401

Rearrangement of electron shells and interchannel interaction in the K photoabsorption of Ne
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Novikovskiy, Nikolay M.; Rezvan, Dmitriy V.; Ivanov, Nikita M.
The European Physical Journal D, Vol. 73, Issue 2
DOI: 10.1140/epjd/e2018-90539-2

Near L -edge Single and Multiple Photoionization of Singly Charged Iron Ions
journal, October 2017

Schippers, Stefan; Martins, Michael; Beerwerth, Randolf
The Astrophysical Journal, Vol. 849, Issue 1
DOI: 10.3847/1538-4357/aa8fcc

Electron-impact Multiple-ionization Cross Sections for Atoms and Ions of Helium through Zinc
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The Astrophysical Journal, Vol. 850, Issue 2
DOI: 10.3847/1538-4357/aa9276

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The Astrophysical Journal, Vol. 887, Issue 2
DOI: 10.3847/1538-4357/ab5118

The photon‐ion merged‐beams experiment PIPE at PETRA III—The first five years
text, January 2020

Schippers, Stefan; Buhr, Ticia; Borovik, Alexander
GSI Helmholtzzentrum fuer Schwerionenforschung, GSI, Darmstadt
DOI: 10.15120/gsi-2021-00153

Photoionization and photofragmentation of singly charged positive and negative Sc$_3$N@C$_{80}$ endohedral fullerene ions
text, January 2019

Mueller, Alfred; Martins, M.; Kilcoyne, A. L. D.
Deutsches Elektronen-Synchrotron, DESY, Hamburg
DOI: 10.3204/pubdb-2019-02410

Near L -edge Single and Multiple Photoionization of Triply Charged Iron Ions
text, January 2019

Beerwerth, Randolf; Buhr, Ticia; Perry-Sassmannshausen, Alexander
Deutsches Elektronen-Synchrotron, DESY, Hamburg
DOI: 10.3204/pubdb-2019-05601

The photon‐ion merged‐beams experiment PIPE at PETRA III—The first five years
text, January 2019

Schippers, Stefan; Buhr, Ticia; Borovik, Alexander
Deutsches Elektronen-Synchrotron, DESY, Hamburg
DOI: 10.3204/pubdb-2019-02368

Absorption spectra at the iodine 3d ionisation threshold following the CH$_x$I$^+$ ($x = 0-3$) cation sequence
text, January 2019

Schubert, Kaja; Guda, Alexander A.; Mertens, Karolin
Deutsches Elektronen-Synchrotron, DESY, Hamburg
DOI: 10.3204/pubdb-2019-04330

Multiple Photodetachment of Carbon Anions via Single and Double Core-Hole Creation
text, January 2020

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Deutsches Elektronen-Synchrotron, DESY, Hamburg
DOI: 10.3204/pubdb-2020-00903

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Title: Photoionization of Ne Atoms and Ne + Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections

Abstract

Citation Formats

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Ne II FINE-STRUCTURE LINE EMISSION FROM THE OUTFLOWS OF YOUNG STELLAR OBJECTS journal, April 2010

Fluorescence and Auger Decay Properties of the Core-Excited F-Like Ions from Ne to Kr journal, April 2012

Characterization and recent modifications of a compact 10 GHz Electron Cyclotron Resonance (ECR) ion source for atomic physics experiments journal, January 1997

K -shell photoionization of O + and O 2 + ions: Experiment and theory journal, August 2015

Auger decay of the photoexcited 2 p − 1 nl Rydberg series in argon journal, August 1999

Radiative and Auger Decay of K‐Vacancy Levels in the Ne, Mg, Si, S, Ar, and Ca Isonuclear Sequences journal, July 2008

Development of single‐particle detectors for keV ions journal, June 1982

Correlation Energies and Auger Rates in Atoms with Inner-Shell Vacancies journal, May 1971

K -Shell Auger Transition Rates and Fluorescence Yields for Elements Be-Ar journal, September 1969

Absolute photoabsorption cross-sections of Ne and Xe in the sub-keV X-ray region journal, March 2003

An investigation of the structure near the L 2,3 edges of argon, the M 4,5 edges of krypton and the N 4,5 edges of xenon, using electron impact with high resolution journal, August 1977

Accurate core ionization potentials and photoelectron kinetic energies for light elements journal, January 1974

Prominent role of multielectron processes in K -shell double and triple photodetachment of oxygen anions journal, October 2016

K-shell photoionization of ground-state Li-like carbon ions [C 3+ ]: experiment, theory and comparison with time-reversed photorecombination journal, November 2009

The Variable Polarization XUV Beamline P04 at PETRA III: Optics, mechanics and their performance journal, May 2013

Inner-Shell Excitations of 2 p Electrons of Argon Investigated by Fast Electron Impact with High Resolution journal, May 2011

K-shell photoionization of ground-state Li-like boron ions [B 2 + ]: experiment and theory journal, June 2010

Interference Effects in the Resonant Photoemission Channels to the N e + 2 p 4 ( D 2 1 ) 3 p P 2 , D 2 , and F 2 States in the Ne 1 s Excitation Region journal, November 2002

Double excitation in the K absorption spectrum of neon journal, May 1983

K -shell photoionization of Be-like and Li-like ions of atomic nitrogen: experiment and theory journal, September 2013

Merged-beams experiments in atomic and molecular physics journal, January 1999

X-Ray Resonant Photoexcitation: Linewidths and Energies of K α Transitions in Highly Charged Fe Ions journal, September 2013

Precision measurements of the total photoionization cross-sections of He, Ne, Ar, Kr, and Xe journal, May 2002

Lifetime Broadening and CI-Resonances Observed in ESCA journal, October 1976

Measurement and ab initio calculation of the Ne photoabsorption spectrum in the region of the K edge journal, March 1999

Dirac-Fock calculations of K − , L − , and M -shell fluorescence and Coster-Kronig yields for Ne, Ar, Kr, Xe, Rn, and Uuo journal, May 2015

K-shell photoionization of Be-like carbon ions: experiment and theory for C 2+ journal, June 2005

X-ray transition energies: new approach to a comprehensive evaluation journal, January 2003

Measurement of Ne 1 s and 1 snl satellite photoelectron spectra near threshold journal, June 1995

First observation of a photon-induced triply excited state in atomic lithium journal, April 1994

Study of Inner-Shell Excitation and Relaxation Processes in Atomic and Ionic Neon by Means of Soft X-Ray Spectroscopy journal, June 2010

On the effects of the two-body non-fine-structure operators of the Breit - Pauli Hamiltonian journal, January 1997

Neon Fine‐Structure Line Emission by X‐Ray Irradiated Protoplanetary Disks journal, February 2007

Doubly excited resonances in the photoionization spectrum of Li + : experiment and theory journal, September 2006

Absolute measurement of radiative and Auger rates of K − shell − vacancy states in highly charged Fe ions journal, March 2015

Photoionisation of ions with synchrotron radiation: from ions in space to atoms in cages journal, November 2015

Oxygen, neon, and iron X-ray absorption in the local interstellar medium journal, March 2016

State-resolved valence shell photoionization of Be-like ions: experiment and theory journal, October 2010

Doubly Excited Autoionization Resonances in the Absorption Spectrum of Li + Formed in a Laser-Produced Plasma journal, May 1977

Performance of a very high resolution soft x-ray beamline BL25SU with a twin-helical undulator at SPring-8 journal, September 2000

Single-photon multiple ionization of neon in the K-edge region journal, February 1997

Nonrelativistic Auger Rates, X-Ray Rates, and Fluorescence Yields for the K Shell journal, June 1971

Assessment of the Fluorescence and Auger DataBase Used in Plasma Modeling journal, July 2003

The 1s 2p resonance photoionization measurement of O ions in comparison with an isoelectronic species Ne 3 journal, September 2002

Auger decay of the photoexcited 1 s − 1 np Rydberg series in neon journal, January 2000

HIGH-RESOLUTION X-RAY SPECTROSCOPY OF THE MULTIPHASE INTERSTELLAR MEDIUM TOWARD Cyg X-2 journal, April 2009

The Chemical Composition of the Sun journal, September 2009

Autoionization Spectra of Beryllium (Be i and be Ii) in the 110- to 140-eV Energy Range journal, February 1974

Precision studies of deep-inner-shell photoabsorption by atomic ions journal, April 2015

Accurate Atomic Transition Probabilities for Hydrogen, Helium, and Lithium journal, September 2009

Natural widths of atomic K and L levels, K α X‐ray lines and several K L L Auger lines journal, April 1979

Experimental Evidence for Double Electron Emission in an Auger Process journal, March 1965

K-SHELL PHOTOIONIZATION AND PHOTOABSORPTION OF Ne, Mg, Si, S, Ar, AND Ca journal, April 2009

Lifetime of a K-shell vacancy in atomic carbon created by 1s 2p photoexcitation of C + journal, February 2004

HIGH-RESOLUTION SPECTROSCOPY OF Ne II EMISSION FROM YOUNG STELLAR OBJECTS journal, February 2012

Reference energies for inner shell electron energy-loss spectroscopy journal, January 1984

Observation of a Four-Electron Auger Process in Near- K -Edge Photoionization of Singly Charged Carbon Ions journal, January 2015

Recent progress in ESCA studies of gases journal, January 1974

K-shell photoionization of B-like oxygen (O 3 + ) ions: experiment and theory journal, May 2014

Absolute cross sections for photoionization of Xe q + ions ( 1 ⩽ q ⩽ 5 ) at the 3d ionization threshold journal, May 2014

CODATA recommended values of the fundamental physical constants: 2014 journal, September 2016

The photoabsorption spectrum of laser-generated Li + in the 60-190 eV photon energy range journal, November 2000

Neon K-shell excitation studied by electron energy-loss spectroscopy journal, August 1980

Unresolvable Rydberg lines in X-ray absorption spectra of free atoms journal, November 1993

Photoionization of Ne + using synchrotron radiation journal, December 2002

Core-electron binding energies in the soft X-ray range obtained in X-ray emission journal, January 1982

K -shell photoionization of O 4 + and O 5 + ions: experiment and theory journal, November 2016

K -shell photoionization of Be-like boron (B + ) ions: experiment and theory journal, June 2014

X-Ray Fluorescence Yields, Auger, and Coster-Kronig Transition Probabilities journal, October 1972

K-shell photoionization of B-like atomic nitrogen ions: experiment and theory journal, February 2014

Photoionization of singly and doubly charged neon ions following inner-shell excitation journal, December 2001

K-shell photoionization of singly ionized atomic nitrogen: experiment and theory journal, August 2011

High‐Resolution X‐Ray Spectroscopy of the Interstellar Medium. II. Neon and Iron Absorption Edges journal, September 2006

VUV/EUV ionising radiation and atoms and ions: dual laser plasma investigations journal, May 2004

Observation of the [ 1 s 2 s ] ( S 3 , 1 ) n l n ′ l ′ P 1 inner-shell doubly excited states of Ne by photoion yield spectroscopy journal, December 2004

Single particle counting of heavy ions with a channeltron detector journal, September 1980

Title: Photoionization of Ne Atoms and Ne ⁺ Ions Near the K Edge: PrecisionSpectroscopy and Absolute Cross-sections

Production of multiply charged ion target for photoionization studies using synchrotron radiation
journal, February 2000

Ne II FINE-STRUCTURE LINE EMISSION FROM THE OUTFLOWS OF YOUNG STELLAR OBJECTS
journal, April 2010

Fluorescence and Auger Decay Properties of the Core-Excited F-Like Ions from Ne to Kr
journal, April 2012

Characterization and recent modifications of a compact 10 GHz Electron Cyclotron Resonance (ECR) ion source for atomic physics experiments
journal, January 1997

K -shell photoionization of $O^{+}$ and $O^{2 +}$ ions: Experiment and theory
journal, August 2015

Auger decay of the photoexcited ${2 p}^{- 1} nl$ Rydberg series in argon
journal, August 1999

Radiative and Auger Decay of K‐Vacancy Levels in the Ne, Mg, Si, S, Ar, and Ca Isonuclear Sequences
journal, July 2008

Development of single‐particle detectors for keV ions
journal, June 1982

Correlation Energies and Auger Rates in Atoms with Inner-Shell Vacancies
journal, May 1971

$K$ -Shell Auger Transition Rates and Fluorescence Yields for Elements Be-Ar
journal, September 1969

Absolute photoabsorption cross-sections of Ne and Xe in the sub-keV X-ray region
journal, March 2003

An investigation of the structure near the L _2,3 edges of argon, the M _4,5 edges of krypton and the N _4,5 edges of xenon, using electron impact with high resolution
journal, August 1977

Accurate core ionization potentials and photoelectron kinetic energies for light elements
journal, January 1974

Prominent role of multielectron processes in $K$ -shell double and triple photodetachment of oxygen anions
journal, October 2016

K-shell photoionization of ground-state Li-like carbon ions [C ³⁺ ]: experiment, theory and comparison with time-reversed photorecombination
journal, November 2009

The Variable Polarization XUV Beamline P04 at PETRA III: Optics, mechanics and their performance
journal, May 2013

Inner-Shell Excitations of 2 p Electrons of Argon Investigated by Fast Electron Impact with High Resolution
journal, May 2011

K-shell photoionization of ground-state Li-like boron ions [B ^{2 +} ]: experiment and theory
journal, June 2010

Interference Effects in the Resonant Photoemission Channels to the ${N e}^{+}$ $2 p^{4} ({}^{1}D_{2}) 3 p$ ${}^{2}P$ , ${}^{2}D$ , and ${}^{2}F$ States in the Ne $1 s$ Excitation Region
journal, November 2002

Double excitation in the K absorption spectrum of neon
journal, May 1983

K -shell photoionization of Be-like and Li-like ions of atomic nitrogen: experiment and theory
journal, September 2013

Merged-beams experiments in atomic and molecular physics
journal, January 1999

X-Ray Resonant Photoexcitation: Linewidths and Energies of $K α$ Transitions in Highly Charged Fe Ions
journal, September 2013

Precision measurements of the total photoionization cross-sections of He, Ne, Ar, Kr, and Xe
journal, May 2002

Lifetime Broadening and CI-Resonances Observed in ESCA
journal, October 1976

Measurement and ab initio calculation of the Ne photoabsorption spectrum in the region of the K edge
journal, March 1999

Dirac-Fock calculations of $K −$ , $L −$ , and $M$ -shell fluorescence and Coster-Kronig yields for Ne, Ar, Kr, Xe, Rn, and Uuo
journal, May 2015

K-shell photoionization of Be-like carbon ions: experiment and theory for C ²⁺
journal, June 2005

X-ray transition energies: new approach to a comprehensive evaluation
journal, January 2003

Measurement of Ne 1 s and 1 snl satellite photoelectron spectra near threshold
journal, June 1995

First observation of a photon-induced triply excited state in atomic lithium
journal, April 1994

Study of Inner-Shell Excitation and Relaxation Processes in Atomic and Ionic Neon by Means of Soft X-Ray Spectroscopy
journal, June 2010

On the effects of the two-body non-fine-structure operators of the Breit - Pauli Hamiltonian
journal, January 1997

Neon Fine‐Structure Line Emission by X‐Ray Irradiated Protoplanetary Disks
journal, February 2007

Doubly excited resonances in the photoionization spectrum of Li ⁺ : experiment and theory
journal, September 2006

Absolute measurement of radiative and Auger rates of $K - shell - vacancy$ states in highly charged Fe ions
journal, March 2015

Photoionisation of ions with synchrotron radiation: from ions in space to atoms in cages
journal, November 2015

Oxygen, neon, and iron X-ray absorption in the local interstellar medium
journal, March 2016

State-resolved valence shell photoionization of Be-like ions: experiment and theory
journal, October 2010

Doubly Excited Autoionization Resonances in the Absorption Spectrum of ${Li}^{+}$ Formed in a Laser-Produced Plasma
journal, May 1977

Performance of a very high resolution soft x-ray beamline BL25SU with a twin-helical undulator at SPring-8
journal, September 2000

Single-photon multiple ionization of neon in the K-edge region
journal, February 1997

Nonrelativistic Auger Rates, X-Ray Rates, and Fluorescence Yields for the $K$ Shell
journal, June 1971

Assessment of the Fluorescence and Auger DataBase Used in Plasma Modeling
journal, July 2003

The 1s 2p resonance photoionization measurement of O ions in comparison with an isoelectronic species Ne ³
journal, September 2002

Auger decay of the photoexcited ${1 s}^{- 1} np$ Rydberg series in neon
journal, January 2000

HIGH-RESOLUTION X-RAY SPECTROSCOPY OF THE MULTIPHASE INTERSTELLAR MEDIUM TOWARD Cyg X-2
journal, April 2009

The Chemical Composition of the Sun
journal, September 2009

Autoionization Spectra of Beryllium (Be i and be Ii) in the 110- to 140-eV Energy Range
journal, February 1974

Precision studies of deep-inner-shell photoabsorption by atomic ions
journal, April 2015

Accurate Atomic Transition Probabilities for Hydrogen, Helium, and Lithium
journal, September 2009

Natural widths of atomic K and L levels, K α X‐ray lines and several K L L Auger lines
journal, April 1979

Experimental Evidence for Double Electron Emission in an Auger Process
journal, March 1965

K-SHELL PHOTOIONIZATION AND PHOTOABSORPTION OF Ne, Mg, Si, S, Ar, AND Ca
journal, April 2009

Lifetime of a K-shell vacancy in atomic carbon created by 1s 2p photoexcitation of C ⁺
journal, February 2004

HIGH-RESOLUTION SPECTROSCOPY OF Ne II EMISSION FROM YOUNG STELLAR OBJECTS
journal, February 2012

Reference energies for inner shell electron energy-loss spectroscopy
journal, January 1984

Observation of a Four-Electron Auger Process in Near- $K$ -Edge Photoionization of Singly Charged Carbon Ions
journal, January 2015

Recent progress in ESCA studies of gases
journal, January 1974

K-shell photoionization of B-like oxygen (O ^{3 +} ) ions: experiment and theory
journal, May 2014

Absolute cross sections for photoionization of Xe ^{q +} ions ( 1 ⩽ q ⩽ 5 ) at the 3d ionization threshold
journal, May 2014

CODATA recommended values of the fundamental physical constants: 2014
journal, September 2016

The photoabsorption spectrum of laser-generated Li ⁺ in the 60-190 eV photon energy range
journal, November 2000

Neon K-shell excitation studied by electron energy-loss spectroscopy
journal, August 1980

Unresolvable Rydberg lines in X-ray absorption spectra of free atoms
journal, November 1993

Photoionization of ${Ne}^{+}$ using synchrotron radiation
journal, December 2002

Core-electron binding energies in the soft X-ray range obtained in X-ray emission
journal, January 1982

K -shell photoionization of O ^4 + and O ^5 + ions: experiment and theory
journal, November 2016

K -shell photoionization of Be-like boron (B ⁺ ) ions: experiment and theory
journal, June 2014

X-Ray Fluorescence Yields, Auger, and Coster-Kronig Transition Probabilities
journal, October 1972

K-shell photoionization of B-like atomic nitrogen ions: experiment and theory
journal, February 2014

Photoionization of singly and doubly charged neon ions following inner-shell excitation
journal, December 2001

K-shell photoionization of singly ionized atomic nitrogen: experiment and theory
journal, August 2011

High‐Resolution X‐Ray Spectroscopy of the Interstellar Medium. II. Neon and Iron Absorption Edges
journal, September 2006

VUV/EUV ionising radiation and atoms and ions: dual laser plasma investigations
journal, May 2004

Observation of the $[1 s 2 s] ({}^{3, 1}S) n l n^{'} l^{'}$ ${}^{1}P$ inner-shell doubly excited states of Ne by photoion yield spectroscopy
journal, December 2004

Single particle counting of heavy ions with a channeltron detector
journal, September 1980

Wavelength Measurements of k Transitions of Oxygen, Neon, and Magnesium with X-Ray Absorption Lines
journal, August 2013

Widths of the Atomic k–n7 Levels
journal, January 2001