Absolute single photoionization cross-sections of Br3+: Experiment and theory

D. A. MacAluso; A. Aguilar; A. L.D. Kilcoyne; R. C. Bilodeau; A. M. Juárez; I. Dumitriu; D. Hardy; N. C. Sterling; M. Bautista

doi:10.1088/1361-6455/ab0e22

Absolute single photoionization cross-sections of Br³⁺: Experiment and theory

D. A. MacAluso
, A. Aguilar
, A. L.D. Kilcoyne
, R. C. Bilodeau
, A. M. Juárez
, I. Dumitriu
, D. Hardy
, N. C. Sterling
, M. Bautista

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Absolute single photoionization cross section measurements for Br³⁺ ions are reported in the photon energy range 44.79-59.54 eV at a photon energy resolution of 21 ±3 meV. Measurements were performed at the Advanced Light Source at Lawrence Berkeley National Laboratory using the merged-beams technique. Numerous resonance features in the experimental spectrum are assigned and their energies and quantum defect values are tabulated. The cross-section measurements are also compared with Breit-Pauli R-matrix calculations with suitable agreement over the photon energy range investigated. Analysis of the measured spectrum including Rydberg resonance series identifications produced a new emperical determination of the ionizational potential of Br³⁺ of 46.977 ± 0.050 eV, which is 805 meV lower than the most recently published value of 47.782 eV. This disparity between our determination and the earlier published value is similar to an 843 meV shift in the accepted ionization potential published for iso-electronic Se²⁺ as part of this same research program.

Original language	English
Article number	145002
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Volume	52
Issue number	14
DOIs	https://doi.org/10.1088/1361-6455/ab0e22
State	Published - Jul 2 2019

Funding

We gratefully acknowledge support from the NSF through award AST-1412928. D Macaluso gratefully acknowledges support from the Montana Space Grant Consortium. R Bilodeau gratefully acknowledges support from the US Department of Energy, Office of Science, Basic Energy Sciences (BES), Division of Chemical Sciences, Geosciences, and Biosciences under grant No. DE-SC0012376. Data acquired at beamline 10.0.1.2 at the Advanced Light Source, which is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the US Department of Energy under contract No. DE-AC02-05CH11231. This research also used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the US Department of Energy (DoE) under Contract No. DE-AC05-00OR22725.

Funder number
AST-1412928

Keywords

astrophysics
atomic and molecular physics
atomic data
observational astronomy
omputational physics
photoionization

Access to Document

10.1088/1361-6455/ab0e22

Cite this

@article{f4bcc0bb82ee4f5097d5666c7afe56df,

title = "Absolute single photoionization cross-sections of Br3+: Experiment and theory",

abstract = "Absolute single photoionization cross section measurements for Br3+ ions are reported in the photon energy range 44.79-59.54 eV at a photon energy resolution of 21 ±3 meV. Measurements were performed at the Advanced Light Source at Lawrence Berkeley National Laboratory using the merged-beams technique. Numerous resonance features in the experimental spectrum are assigned and their energies and quantum defect values are tabulated. The cross-section measurements are also compared with Breit-Pauli R-matrix calculations with suitable agreement over the photon energy range investigated. Analysis of the measured spectrum including Rydberg resonance series identifications produced a new emperical determination of the ionizational potential of Br3+ of 46.977 ± 0.050 eV, which is 805 meV lower than the most recently published value of 47.782 eV. This disparity between our determination and the earlier published value is similar to an 843 meV shift in the accepted ionization potential published for iso-electronic Se2+ as part of this same research program.",

keywords = "astrophysics, atomic and molecular physics, atomic data, observational astronomy, omputational physics, photoionization",

author = "MacAluso, \{D. A.\} and A. Aguilar and Kilcoyne, \{A. L.D.\} and Bilodeau, \{R. C.\} and Ju{\'a}rez, \{A. M.\} and I. Dumitriu and D. Hardy and Sterling, \{N. C.\} and M. Bautista",

note = "Publisher Copyright: {\textcopyright} 2019 IOP Publishing Ltd.",

year = "2019",

month = jul,

day = "2",

doi = "10.1088/1361-6455/ab0e22",

language = "English",

volume = "52",

journal = "Journal of Physics B: Atomic, Molecular and Optical Physics",

issn = "0953-4075",

publisher = "Institute of Physics",

number = "14",

}

TY - JOUR

T1 - Absolute single photoionization cross-sections of Br3+

T2 - Experiment and theory

AU - MacAluso, D. A.

AU - Aguilar, A.

AU - Kilcoyne, A. L.D.

AU - Bilodeau, R. C.

AU - Juárez, A. M.

AU - Dumitriu, I.

AU - Hardy, D.

AU - Sterling, N. C.

AU - Bautista, M.

PY - 2019/7/2

Y1 - 2019/7/2

N2 - Absolute single photoionization cross section measurements for Br3+ ions are reported in the photon energy range 44.79-59.54 eV at a photon energy resolution of 21 ±3 meV. Measurements were performed at the Advanced Light Source at Lawrence Berkeley National Laboratory using the merged-beams technique. Numerous resonance features in the experimental spectrum are assigned and their energies and quantum defect values are tabulated. The cross-section measurements are also compared with Breit-Pauli R-matrix calculations with suitable agreement over the photon energy range investigated. Analysis of the measured spectrum including Rydberg resonance series identifications produced a new emperical determination of the ionizational potential of Br3+ of 46.977 ± 0.050 eV, which is 805 meV lower than the most recently published value of 47.782 eV. This disparity between our determination and the earlier published value is similar to an 843 meV shift in the accepted ionization potential published for iso-electronic Se2+ as part of this same research program.

AB - Absolute single photoionization cross section measurements for Br3+ ions are reported in the photon energy range 44.79-59.54 eV at a photon energy resolution of 21 ±3 meV. Measurements were performed at the Advanced Light Source at Lawrence Berkeley National Laboratory using the merged-beams technique. Numerous resonance features in the experimental spectrum are assigned and their energies and quantum defect values are tabulated. The cross-section measurements are also compared with Breit-Pauli R-matrix calculations with suitable agreement over the photon energy range investigated. Analysis of the measured spectrum including Rydberg resonance series identifications produced a new emperical determination of the ionizational potential of Br3+ of 46.977 ± 0.050 eV, which is 805 meV lower than the most recently published value of 47.782 eV. This disparity between our determination and the earlier published value is similar to an 843 meV shift in the accepted ionization potential published for iso-electronic Se2+ as part of this same research program.

KW - astrophysics

KW - atomic and molecular physics

KW - atomic data

KW - observational astronomy

KW - omputational physics

KW - photoionization

UR - https://www.scopus.com/pages/publications/85068974801

U2 - 10.1088/1361-6455/ab0e22

DO - 10.1088/1361-6455/ab0e22

M3 - Article

AN - SCOPUS:85068974801

SN - 0953-4075

VL - 52

JO - Journal of Physics B: Atomic, Molecular and Optical Physics

JF - Journal of Physics B: Atomic, Molecular and Optical Physics

IS - 14

M1 - 145002

ER -