Single-photon photoionization of oxygen-like Ne III
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 (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.
- Authors:
-
- 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:
- 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.
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.
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.
@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}
}