Determining the rp -Process Flow through Ni56 : Resonances in Cu57(p,γ)Zn58 Identified with GRETINA

Langer, C.; Montes, F.; Aprahamian, A.; Bardayan, D. W.; Bazin, D.; Brown, B. A.; Browne, J.; Crawford, H.; Cyburt, R. H.; Domingo-Pardo, C.; Gade, A.; George, S.; Hosmer, P.; Keek, L.; Kontos, A.; Lee, I-Y.; Lemasson, A.; Lunderberg, E.; Maeda, Y.; Matos, M.; Meisel, Z.; Noji, S.; Nunes, F. M.; Nystrom, A.; Perdikakis, G.; Pereira, J.; Quinn, S. J.; Recchia, F.; Schatz, H.; Scott, M.; Siegl, K.; Simon, A.; Smith, M.; Spyrou, A.; Stevens, J.; Stroberg, S. R.; Weisshaar, D.; Wheeler, J.; Wimmer, K.; Zegers, R. G.  T.

doi:10.1103/PhysRevLett.113.032502

Title: Determining the $r p$ -Process Flow through ${}^{56}{Ni}$ : Resonances in ${}^{57}{Cu} (p, γ) {}^{58}{Zn}$ Identified with GRETINA

Journal Article · Mon Jul 14 00:00:00 EDT 2014 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.113.032502· OSTI ID:1407242

Langer, C. ^[1]; Montes, F. ^[1]; Aprahamian, A. ^[2]; Bardayan, D. W. ^[3]; Bazin, D. ^[1]; Brown, B. A. ^[1]; Browne, J. ^[1]; Crawford, H. ^[4]; Cyburt, R. H. ^[1]; Domingo-Pardo, C. ^[5]; Gade, A. ^[1]; George, S. ^[6]; Hosmer, P. ^[7]; Keek, L. ^[1]; Kontos, A. ^[1]; Lee, I-Y. ^[4]; Lemasson, A. ^[1]; Lunderberg, E. ^[1]; Maeda, Y. ^[8]; Matos, M. ^[9] more »

Michigan State Univ., East Lansing, MI (United States)
Univ. of Notre Dame, IN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of Valencia (Spain)
Univ. of Greifswald (Germany)
Hillsdale College, MI (United States)
Univ. of Miyazaki (Japan)
Louisiana State Univ., Baton Rouge, LA (United States)
Central Michigan Univ., Mount Pleasant, MI (United States); Michigan State Univ., East Lansing, MI (United States)

An approach is presented in this paper to experimentally constrain previously unreachable (p,γ) reaction rates on nuclei far from stability in the astrophysical rp process. Energies of all critical resonances in the ⁵⁷Cu(p,γ)⁵⁸Zn reaction are deduced by populating states in ⁵⁸Zn with a (d,n) reaction in inverse kinematics at 75 MeV/u, and detecting γ-ray-recoil coincidences with the state-of-the-art γ-ray tracking array GRETINA and the S800 spectrograph at the National Superconducting Cyclotron Laboratory. The results reduce the uncertainty in the ⁵⁷Cu(p,γ) reaction rate by several orders of magnitude. Finally, the effective lifetime of ⁵⁶Ni, an important waiting point in the rp process in x-ray bursts, can now be determined entirely from experimentally constrained reaction rates.

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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); German Research Foundation (DFG); Ministry of Economy and Competitiveness (MINECO) (Spain)

DOE Contract Number:: AC02-05CH11231; FG52-08NA28552; SC0004087; PHY11-02511; PHY10-68217; PHY08-22648; NSF1068571; GE2183/2-1; FPA2011-29854

OSTI ID:: 1407242

Journal Information:: Physical Review Letters, Vol. 113, Issue 3; ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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Title: Determining the $r p$ -Process Flow through ${}^{56}{Ni}$ : Resonances in ${}^{57}{Cu} (p, γ) {}^{58}{Zn}$ Identified with GRETINA