Complete double valence photoionization study of the electron spectra of krypton

Linusson, P.; Hedin, Lage; Eland, J. H. D.; Squibb, Richard J.; Mucke, Melanie; Zagorodskikh, Sergey; Karlsson, Leif; Feifel, Raimund

doi:10.1103/physreva.88.022510

Cited by 5 publications

(6 citation statements)

References 30 publications

(61 reference statements)

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“…Figure 2 shows the 4p −2 nl satellite lines of Kr excited by 99.00 eV (E exc =5.21 eV) photons in the binding energy region of 38.3-40.3 eV. The Kr + 4p −2 ( 1 D 2 )nd( 2 S) correlation satellites dominate the spectrum at 0°as shown with red dotted lines due to the strong configuration interaction between the 4 s −1 ( 2 S) and the 4p −2 nd( 2 S) [31][32][33][34][35][36][37]. The Kr + 4p −2 ( 1 D 2 )nd( 2 S) does not appear in the measurement of 90°thick blue lines in accord with a p-wave distribution of the ejected electron.…”

Section: Resultsmentioning

confidence: 99%

Dominance of angular momentum exchange in the PCI recapture of photoelectrons revealed by high resolution Auger electron measurements of Kr

Kosugi

Suzuki

Kumagai

et al. 2019

J. Phys. B: At. Mol. Opt. Phys.

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An unexpectedly prominent angular momentum exchange effect in the double photoionization continuum was identified through the photoelectron recapture process induced by post-collision interaction (PCI). The Kr (M5N2,3N2,3) Auger electron spectrum originating from 3d−15/2 photoionization was measured with the photon energy tuned very close above the ionization threshold. As the photon energy approached the 3d−15/2 photoionization threshold, Rydberg series structures including several angular momentum components were formed within the Auger peak profile by the recapture of the photoelectrons into high-lying final ion orbitals. Our spectrum with line-width much narrower than the lifetime width of the corresponding core excited state allowed us to resolve detailed structures due to the orbital angular momentum states very clearly. Unexpectedly, conjugate peaks originating from the exchange of angular momentum between the photoelectron and the Auger electron through PCI were found to dominate the spectrum. Comparison with valence photoelectron spectrum of Kr via direct photoionization confirms the new assignment. Conjugate peaks were also found to be in accord with the quantum defect values obtained for the high Rydberg series Kr+4p−2(1S0, 1D2)ml. Extension of the new assignments to photon energies below threshold may call for the revision of previous interpretations of resonance Auger processes.

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Section: Resultsmentioning

confidence: 99%

Dominance of angular momentum exchange in the PCI recapture of photoelectrons revealed by high resolution Auger electron measurements of Kr

Kosugi

Suzuki

Kumagai

et al. 2019

J. Phys. B: At. Mol. Opt. Phys.

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“…The combination of the high collection e ciency of a magnetic bottle spectrometer and tunable synchrotron radiation, serves well for coincidences studies on Auger cascades. A few multi-electron coincidence studies on di erent noble gases [47][48][49][50][51] and a few examples on metal atoms [52][53][54][55], based on similar techniques existed prior to this thesis. These previous studies demonstrated the e ciency of the technique and the amount of information that can be obtained on electronic relaxation.…”

Section: Triple Ionization Of Metal Atomsmentioning

confidence: 99%

Dissociation of multiply charged ICN by Coulomb explosion

Eland

Singh

Pickering

et al. 2016

The Journal of Chemical Physics

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The fragmentations of iodine cyanide ions created with 2 to 8 positive charges by photoionization from inner shells with binding energies from 59 eV (I 4d) to ca. 900 eV (I 3p) have been examined by multi-electron and multi-ion coincidence spectroscopy with velocity map imaging ion capability. The charge distributions produced by hole formation in each shell are characterised and systematic effects of the number of charges and of initial charge localisation are found.

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“…Double photoionization electron coincidence spectroscopy based on a magnetic bottle introduced by Eland et al 10 in 2003 opened up the possibility to determine the correlation of electrons with a wide range of kinetic energies. To begin with, this method was used to study valence double ionization of atoms and molecules [10][11][12][13][14][15][16][17][18][19] using a pulsed He lamp, and was subsequently applied to studies of core-valence double photoionization of atoms and molecules [20][21][22][23][24][25][26] utilizing synchrotron radiation sources. Both processes are examples of double ionization, where the two electrons emitted may share the excess energy provided by the absorbed photon arbitrarily, in contrast to fixed electron kinetic energies typically observed in cases of single core shell ionization followed by normal Auger decay.…”

Section: Introductionmentioning

confidence: 99%

Single-photon double and triple ionization of acetaldehyde (ethanal) studied by multi-electron coincidence spectroscopy

et al. 2015

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PostprintThis is the accepted version of a paper published in Chemical Physics. This paper has been peerreviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Zagorodskikh, S., Zhaunerchyk, V., Mucke, M., Eland, J H., Squibb, R J. et al. (2015) Single-photon double and triple ionization of acetaldehyde (ethanal) studied by multi-electron coincidence spectroscopy. Single-photon multiple ionization processes of acetaldehyde (ethanal) have been experimentally investigated by utilizing a multi-particle coincidence technique based on the time-of-flight magnetic bottle principle, in combination with either a synchrotron radiation source or a pulsed helium discharge lamp. The processes investigated include double and triple ionization in the valence region as well as single and doubleAuger decay of core-ionized acetaldehyde. The latter are studied site-selectively for chemically different carbon core vacancies, scrutinizing early theoretical predictions specifically made for the case of acetaldehyde. Moreover, Auger processes in shake-up and core-valence ionized states are investigated. In the cases where the processes involve simultaneous emission of two electrons, the distributions of the energy sharing are presented, emphasizing either the knock-out or shake-off mechanism.a)

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Complete double valence photoionization study of the electron spectra of krypton

Cited by 5 publications

References 30 publications

Dominance of angular momentum exchange in the PCI recapture of photoelectrons revealed by high resolution Auger electron measurements of Kr

Dominance of angular momentum exchange in the PCI recapture of photoelectrons revealed by high resolution Auger electron measurements of Kr

Dissociation of multiply charged ICN by Coulomb explosion

Single-photon double and triple ionization of acetaldehyde (ethanal) studied by multi-electron coincidence spectroscopy

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