New γ -ray transitions observed in Ne 19 with implications for the O 15 (α,γ) Ne 19 reaction rate

M. R. Hall; D. W. Bardayan; T. Baugher; A. Lepailleur; S. D. Pain; A. Ratkiewicz; S. Ahn; J. M. Allen; J. T. Anderson; A. D. Ayangeakaa; J. C. Blackmon; S. Burcher; M. P. Carpenter; S. M. Cha; K. Y. Chae; K. A. Chipps; J. A. Cizewski; M. Febbraro; O. Hall; J. Hu; C. L. Jiang; K. L. Jones; E. J. Lee; P. D. O'Malley; S. Ota; B. C. Rasco; D. Santiago-Gonzalez; D. Seweryniak; H. Sims; K. Smith; W. P. Tan; P. Thompson; C. Thornsberry; R. L. Varner; D. Walter; G. L. Wilson; S. Zhu

doi:10.1103/PhysRevC.99.035805

New γ -ray transitions observed in Ne 19 with implications for the O 15 (α,γ) Ne 19 reaction rate

M. R. Hall, D. W. Bardayan, T. Baugher, A. Lepailleur, S. D. Pain, A. Ratkiewicz, S. Ahn, J. M. Allen, J. T. Anderson, A. D. Ayangeakaa, J. C. Blackmon, S. Burcher, M. P. Carpenter, S. M. Cha, K. Y. Chae, K. A. Chipps, J. A. Cizewski, M. Febbraro, O. Hall, J. HuC. L. Jiang, K. L. Jones, E. J. Lee, P. D. O'Malley, S. Ota, B. C. Rasco, D. Santiago-Gonzalez, D. Seweryniak, H. Sims, K. Smith, W. P. Tan, P. Thompson, C. Thornsberry, R. L. Varner, D. Walter, G. L. Wilson, S. Zhu

Nuclear Structure and Nuclear Astrophysi

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6 Scopus citations

Abstract

The O15(α,γ)Ne19 reaction is responsible for breakout from the hot CNO cycle in type I x-ray bursts. Understanding the properties of resonances between Ex=4 and 5 MeV in Ne19 is crucial in the calculation of this reaction rate. The spins and parities of these states are well known, with the exception of the 4.14- and 4.20-MeV states, which have adopted spin-parities of 9/2- and 7/2-, respectively. γ-ray transitions from these states were studied using triton-γ-γ coincidences from the F19(He3,tγ)Ne19 reaction measured with the GODDESS (Gammasphere ORRUBA Dual Detectors for Experimental Structure Studies) at Argonne National Laboratory. The observed transitions from the 4.14- and 4.20-MeV states provide strong evidence that the Jπ values are actually 7/2- and 9/2-, respectively. These assignments are consistent with the values in the F19 mirror nucleus and in contrast to previously accepted assignments.

Original language	English
Article number	035805
Journal	Physical Review C
Volume	99
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.99.035805
State	Published - Mar 29 2019

Funding

This research was supported in part by the National Science Foundation Grants No. PHY-1419765 (Notre Dame) and No. PHY-1404218 (Rutgers), the National Nuclear Security Administration under the Stewardship Science Academic Alliances program through DOE Cooperative Agreement No. DE-NA002132, and by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. NRF-2016R1A5A1013277 and No. NRF-2013M7A1A1075764). The authors also acknowledge support from the DOE Office of Science, Office of Nuclear Physics, under Contracts No. DE-AC05-00OR22725, No. DE-FG02-96ER40963, No. DE-FG02-96ER40978, and No. DE-AC02-06CH11357. This research used resources of Argonne National Laboratory's ATLAS facility, which is a DOE Office of Science User Facility.

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Hall, M. R., Bardayan, D. W., Baugher, T., Lepailleur, A., Pain, S. D., Ratkiewicz, A., Ahn, S., Allen, J. M., Anderson, J. T., Ayangeakaa, A. D., Blackmon, J. C., Burcher, S., Carpenter, M. P., Cha, S. M., Chae, K. Y., Chipps, K. A., Cizewski, J. A., Febbraro, M., Hall, O., ... Zhu, S. (2019). New γ -ray transitions observed in Ne 19 with implications for the O 15 (α,γ) Ne 19 reaction rate. Physical Review C, 99(3), Article 035805. https://doi.org/10.1103/PhysRevC.99.035805

@article{389663856c1e4e4ca19dce42b2b444cf,

title = "New γ -ray transitions observed in Ne 19 with implications for the O 15 (α,γ) Ne 19 reaction rate",

abstract = "The O15(α,γ)Ne19 reaction is responsible for breakout from the hot CNO cycle in type I x-ray bursts. Understanding the properties of resonances between Ex=4 and 5 MeV in Ne19 is crucial in the calculation of this reaction rate. The spins and parities of these states are well known, with the exception of the 4.14- and 4.20-MeV states, which have adopted spin-parities of 9/2- and 7/2-, respectively. γ-ray transitions from these states were studied using triton-γ-γ coincidences from the F19(He3,tγ)Ne19 reaction measured with the GODDESS (Gammasphere ORRUBA Dual Detectors for Experimental Structure Studies) at Argonne National Laboratory. The observed transitions from the 4.14- and 4.20-MeV states provide strong evidence that the Jπ values are actually 7/2- and 9/2-, respectively. These assignments are consistent with the values in the F19 mirror nucleus and in contrast to previously accepted assignments.",

author = "Hall, {M. R.} and Bardayan, {D. W.} and T. Baugher and A. Lepailleur and Pain, {S. D.} and A. Ratkiewicz and S. Ahn and Allen, {J. M.} and Anderson, {J. T.} and Ayangeakaa, {A. D.} and Blackmon, {J. C.} and S. Burcher and Carpenter, {M. P.} and Cha, {S. M.} and Chae, {K. Y.} and Chipps, {K. A.} and Cizewski, {J. A.} and M. Febbraro and O. Hall and J. Hu and Jiang, {C. L.} and Jones, {K. L.} and Lee, {E. J.} and O'Malley, {P. D.} and S. Ota and Rasco, {B. C.} and D. Santiago-Gonzalez and D. Seweryniak and H. Sims and K. Smith and Tan, {W. P.} and P. Thompson and C. Thornsberry and Varner, {R. L.} and D. Walter and Wilson, {G. L.} and S. Zhu",

note = "Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = mar,

day = "29",

doi = "10.1103/PhysRevC.99.035805",

language = "English",

volume = "99",

journal = "Physical Review C",

issn = "2469-9985",

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Hall, MR, Bardayan, DW, Baugher, T, Lepailleur, A, Pain, SD, Ratkiewicz, A, Ahn, S, Allen, JM, Anderson, JT, Ayangeakaa, AD, Blackmon, JC, Burcher, S, Carpenter, MP, Cha, SM, Chae, KY, Chipps, KA, Cizewski, JA, Febbraro, M, Hall, O, Hu, J, Jiang, CL, Jones, KL, Lee, EJ, O'Malley, PD, Ota, S, Rasco, BC, Santiago-Gonzalez, D, Seweryniak, D, Sims, H, Smith, K, Tan, WP, Thompson, P, Thornsberry, C, Varner, RL, Walter, D, Wilson, GL & Zhu, S 2019, 'New γ -ray transitions observed in Ne 19 with implications for the O 15 (α,γ) Ne 19 reaction rate', Physical Review C, vol. 99, no. 3, 035805. https://doi.org/10.1103/PhysRevC.99.035805

TY - JOUR

T1 - New γ -ray transitions observed in Ne 19 with implications for the O 15 (α,γ) Ne 19 reaction rate

AU - Hall, M. R.

AU - Bardayan, D. W.

AU - Baugher, T.

AU - Lepailleur, A.

AU - Pain, S. D.

AU - Ratkiewicz, A.

AU - Ahn, S.

AU - Allen, J. M.

AU - Anderson, J. T.

AU - Ayangeakaa, A. D.

AU - Blackmon, J. C.

AU - Burcher, S.

AU - Carpenter, M. P.

AU - Cha, S. M.

AU - Chae, K. Y.

AU - Chipps, K. A.

AU - Cizewski, J. A.

AU - Febbraro, M.

AU - Hall, O.

AU - Hu, J.

AU - Jiang, C. L.

AU - Jones, K. L.

AU - Lee, E. J.

AU - O'Malley, P. D.

AU - Ota, S.

AU - Rasco, B. C.

AU - Santiago-Gonzalez, D.

AU - Seweryniak, D.

AU - Sims, H.

AU - Smith, K.

AU - Tan, W. P.

AU - Thompson, P.

AU - Thornsberry, C.

AU - Varner, R. L.

AU - Walter, D.

AU - Wilson, G. L.

AU - Zhu, S.

PY - 2019/3/29

Y1 - 2019/3/29

N2 - The O15(α,γ)Ne19 reaction is responsible for breakout from the hot CNO cycle in type I x-ray bursts. Understanding the properties of resonances between Ex=4 and 5 MeV in Ne19 is crucial in the calculation of this reaction rate. The spins and parities of these states are well known, with the exception of the 4.14- and 4.20-MeV states, which have adopted spin-parities of 9/2- and 7/2-, respectively. γ-ray transitions from these states were studied using triton-γ-γ coincidences from the F19(He3,tγ)Ne19 reaction measured with the GODDESS (Gammasphere ORRUBA Dual Detectors for Experimental Structure Studies) at Argonne National Laboratory. The observed transitions from the 4.14- and 4.20-MeV states provide strong evidence that the Jπ values are actually 7/2- and 9/2-, respectively. These assignments are consistent with the values in the F19 mirror nucleus and in contrast to previously accepted assignments.

AB - The O15(α,γ)Ne19 reaction is responsible for breakout from the hot CNO cycle in type I x-ray bursts. Understanding the properties of resonances between Ex=4 and 5 MeV in Ne19 is crucial in the calculation of this reaction rate. The spins and parities of these states are well known, with the exception of the 4.14- and 4.20-MeV states, which have adopted spin-parities of 9/2- and 7/2-, respectively. γ-ray transitions from these states were studied using triton-γ-γ coincidences from the F19(He3,tγ)Ne19 reaction measured with the GODDESS (Gammasphere ORRUBA Dual Detectors for Experimental Structure Studies) at Argonne National Laboratory. The observed transitions from the 4.14- and 4.20-MeV states provide strong evidence that the Jπ values are actually 7/2- and 9/2-, respectively. These assignments are consistent with the values in the F19 mirror nucleus and in contrast to previously accepted assignments.

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U2 - 10.1103/PhysRevC.99.035805

DO - 10.1103/PhysRevC.99.035805

M3 - Article

AN - SCOPUS:85064081838

SN - 2469-9985

VL - 99

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 035805

ER -

New γ -ray transitions observed in Ne 19 with implications for the O 15 (α,γ) Ne 19 reaction rate

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