New γ -ray transitions observed in Ne19 with implications for the O15(α,γ)Ne19 reaction rate
Year: 2019
Type: article
Abstract: The $^{15}\mathrm{O}(\ensuremath{\alpha},\ensuremath{\gamma})^{19}\mathrm{Ne}$ reaction is responsible for breakout from the hot CNO cycle in type I x-ray bursts. Understanding the properties of resonances between ${E}_{x}=4$ and 5 MeV in $^{19}\mathrm{Ne}$ 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 $9/{2}^{\ensuremath{-}}$ and $7/{2}^{\ensuremath{-}}$, respectively. $\ensuremath{\gamma}$-ray transitions from these states were studied using triton-$\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coincidences from the $^{19}\mathrm{F}(^{3}\mathrm{He},t\ensuremath{\gamma})^{19}\mathrm{Ne}$ 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 ${J}^{\ensuremath{\pi}}$ values are actually $7/{2}^{\ensuremath{-}}$ and $9/{2}^{\ensuremath{-}}$, respectively. These assignments are consistent with the values in the $^{19}\mathrm{F}$ mirror nucleus and in contrast to previously accepted assignments.
Source: Physical Review C
Authors: 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
Institutions: University of Notre Dame, Rutgers, The State University of New Jersey, Oak Ridge National Laboratory, National Superconducting Cyclotron Laboratory, Michigan State University, Argonne National Laboratory, Louisiana State University, University of Tennessee at Knoxville, Sungkyunkwan University, University of Surrey, Lawrence Livermore National Laboratory, University of Massachusetts Lowell
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G102163711, G107546177, G121915436, G1313983767, NUCLEAR STRUCTURE AND NUCLEAR ASTROPHYSCIS, G1501359937, G1528409558, G1548337573, G1645119126, G1664757510, G1753444810, G1760870335, THE STRUCTURE OF NUCLEI FAR FROM STABILITY AND NUCLEAR ASTROPHYSICS USING RADIOACTIVE ION BEAMS, G203625172, G222768804, G2287611682, G2295483553, G2411683797, G262962599, G269966661, G275679244, G2887060908, G2896472831, G2988778103, G3075337988, G3318903820, THEORETICAL NUCLEAR STRUCTURE, Nuclear Structure and Nuclear Astrophysics, G3801555596, G3959653262, G498139845, G5106849484, G513797252, G5298012900, G5523800543, THE STRUCTURE OF NUCLEI FAR FROM STABILITY AND NUCLEAR ASTROPHYSICS USING RADIOACTIVE ION BEAMS, G6473750730, G6848031779, G6911681599, G6918803902, G6982162936, G7278572226, G7368700025, G7863506316, G8092632321, G816254390, Nuclear Reactions to Probe Structure of Exotic Nuclei, G8269158468, THE STRUCTURE OF NUCLEI FAR FROM STABILITY, G8683760817, G8906985441, G8916190169, G919133822, G922074365, G969889393, G993149817
OpenAlex ID: W2930096803