Single-photon photoionization of oxygen-like Ne III

doi:10.1016/j.ijms.2019.05.009

Title: Single-photon photoionization of oxygen-like Ne III

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Abstract

Here, we offer a theoretical and experimental study of the single-photon photoionization of Ne III. The high photon flux and the high-resolution capabilities of the Advanced Light Source at the LBNL were employed to measure absolute photoionization cross sections. The resulting spectrum has been benchmarked against high accuracy relativistic Breit-Pauli R-matrix calculations. Additionally, a large close-coupling wave function expansion which comprises up to 58 fine-structure levels of the residual ion Ne IV of configurations 2s²2p³, 2s²p⁴, 2p⁵, 2s²2p²3s, 2s²2p²3p and 2s²2p²3d was included. A complete identification of the measured features was achieved by considering seven low-lying levels of Ne III. We found that the photoionization cross-section (σ_PI) exhibits the presence of prominent resonances in the lowenergy region near the ionization thresholds that correspond to low-lying levels. These include highpeak narrow resonances with almost zero background introduced by relativistic effects. However, there does not exist a significant contribution to σ_PI from relativistic effects at the high-energy interval of the present study.

Authors:

Nahar, Sultana N. ^[1]; Covington, Aaron M. ^[2]; Kilcoyne, David ^[3]; Davis, Vern T. ^[2]; Thompson, Jeff S. ^[2]; Hernandez, E. M. ^[4]; Antillon, A. ^[4]; Juarez, A. M. ^[4]; Morales-Mori, A. ^[4]; Hinojosa, Guillermo ^[4]

The Ohio State Univ., Columbus, OH (United States)
Univ. of Nevada, Reno, NV (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Universidad Nacional Autónoma de México, Cuernavaca (Mexico)

Publication Date:: 2019-05-16

Research Org.:: Univ. of Nevada, Reno, NV (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Science (NA-113); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

OSTI Identifier:: 1527372

Grant/Contract Number:: NA0002075; AC02-05CH11231; SC0012331

Resource Type:: Accepted Manuscript

Journal Name:: International Journal of Mass Spectrometry

Additional Journal Information:: Journal Volume: 443; Journal Issue: C; Journal ID: ISSN 1387-3806

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; photoionization; Isoelectronic to oxygen; Opacity; Auto-ionizing states; Synchrotron radiation; Soft X-rays; Breit-pauli; R-matrix; Ab-initio; PACS: 31.15.A- 31.30.jc; 32.30.Rj; 32.70.Fw; 32.80.Ee; 32.80.Fb; 32.80.Zb; 95.30.Ky; 97.10.Ex

Citation Formats


                    Nahar, Sultana N., Covington, Aaron M., Kilcoyne, David, Davis, Vern T., Thompson, Jeff S., Hernandez, E. M., Antillon, A., Juarez, A. M., Morales-Mori, A., and Hinojosa, Guillermo. Single-photon photoionization of oxygen-like Ne III.  United States: N. p., 2019. 
        Web.  doi:10.1016/j.ijms.2019.05.009.

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                    Nahar, Sultana N., Covington, Aaron M., Kilcoyne, David, Davis, Vern T., Thompson, Jeff S., Hernandez, E. M., Antillon, A., Juarez, A. M., Morales-Mori, A., & Hinojosa, Guillermo. Single-photon photoionization of oxygen-like Ne III.  United States.  doi:10.1016/j.ijms.2019.05.009.

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                    Nahar, Sultana N., Covington, Aaron M., Kilcoyne, David, Davis, Vern T., Thompson, Jeff S., Hernandez, E. M., Antillon, A., Juarez, A. M., Morales-Mori, A., and Hinojosa, Guillermo. Thu .  
        "Single-photon photoionization of oxygen-like Ne III".  United States.  doi:10.1016/j.ijms.2019.05.009.  https://www.osti.gov/servlets/purl/1527372.

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@article{osti_1527372,

  title        = {Single-photon photoionization of oxygen-like Ne III},

  author       = {Nahar, Sultana N. and Covington, Aaron M. and Kilcoyne, David and Davis, Vern T. and Thompson, Jeff S. and Hernandez, E. M. and Antillon, A. and Juarez, A. M. and Morales-Mori, A. and Hinojosa, Guillermo},

  abstractNote = {Here, we offer a theoretical and experimental study of the single-photon photoionization of Ne III. The high photon flux and the high-resolution capabilities of the Advanced Light Source at the LBNL were employed to measure absolute photoionization cross sections. The resulting spectrum has been benchmarked against high accuracy relativistic Breit-Pauli R-matrix calculations. Additionally, a large close-coupling wave function expansion which comprises up to 58 fine-structure levels of the residual ion Ne IV of configurations 2s22p3, 2s2p4, 2p5, 2s22p23s, 2s22p23p and 2s22p23d was included. A complete identification of the measured features was achieved by considering seven low-lying levels of Ne III. We found that the photoionization cross-section (σPI) exhibits the presence of prominent resonances in the lowenergy region near the ionization thresholds that correspond to low-lying levels. These include highpeak narrow resonances with almost zero background introduced by relativistic effects. However, there does not exist a significant contribution to σPI from relativistic effects at the high-energy interval of the present study.},

  doi          = {10.1016/j.ijms.2019.05.009},

  journal      = {International Journal of Mass Spectrometry},

  number       = C,

  volume       = 443,

  place        = {United States},

  year         = {2019},

  month        = {5}

}

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DOI: 10.1016/j.ijms.2019.05.009

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