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New gamma-ray transitions observed in Ne-19 with implications for the O-15(alpha, gamma)(19) Ne reaction rateopen access
- Authors
- Hall, MR[Hall, M. R.]; Bardayan, DW[Bardayan, D. W.]; Baugher, T[Baugher, T.]; Lepailleur, A[Lepailleur, A.]; Pain, SD[Pain, S. D.]; Ratkiewicz, A[Ratkiewicz, A.]; Ahn, S[Ahn, S.]; Allen, JM[Allen, J. M.]; Anderson, JT[Anderson, J. T.]; Ayangeakaa, AD[Ayangeakaa, A. D.]; Blackmon, JC[Blackmon, J. C.]; Burcher, S[Burcher, S.]; Carpenter, MP[Carpenter, M. P.]; Cha, SM[Cha, S. M.]; Chae, KY[Chae, K. Y.]; Chipps, KA[Chipps, K. A.]; Cizewski, JA[Cizewski, J. A.]; Febbraro, M[Febbraro, M.]; Hall, O[Hall, O.]; Hu, J[Hu, J.]; Jiang, CL[Jiang, C. L.]; Jones, KL[Jones, K. L.]; Lee, EJ[Lee, E. J.]; O'Malley, PD[O'Malley, P. D.]; Ota, S[Ota, S.]; Rasco, BC[Rasco, B. C.]; Santiago-Gonzalez, D[Santiago-Gonzalez, D.]; Seweryniak, D[Seweryniak, D.]; Sims, H[Sims, H.]; Smith, K[Smith, K.]; Tan, WP[Tan, W. P.]; Thompson, P[Thompson, P.]; Thornsberry, C[Thornsberry, C.]; Varner, RL[Varner, R. L.]; Walter, D[Walter, D.]; Wilson, GL[Wilson, G. L.]; Zhu, S[Zhu, S.]
- Issue Date
- 29-Mar-2019
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW C, v.99, no.3
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW C
- Volume
- 99
- Number
- 3
- ISSN
- 2469-9985
- Abstract
- The O-15(alpha, gamma)(19) 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 Ne-19 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. gamma-ray transitions from these states were studied using triton-gamma-gamma coincidences from the F-19(He-3, t gamma)(19) 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(pi) values are actually 7/2(-) and 9/2(-), respectively. These assignments are consistent with the values in the F-19 mirror nucleus and in contrast to previously accepted assignments.
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