6533b872fe1ef96bd12d415d

RESEARCH PRODUCT

Determining therp-Process Flow throughNi56: Resonances inCu57(p,γ)Zn58Identified with GRETINA

Shumpei NojiFilomena NunesJ. StevensJ. WheelerRichard H. CyburtC. LangerH. L. CrawfordS. J. QuinnMichael S. SmithAlexandra GadeS. R. StrobergJ. BrowneHendrik SchatzD. W. BardayanKathrin WimmerKathrin WimmerR. G. T. ZegersE. LunderbergA. NystromF. RecchiaG. PerdikakisA. SpyrouC. Domingo-pardoD. WeisshaarAntonios KontosA. LemassonZ. MeiselB. A. BrownSebastian GeorgeAni AprahamianAnna SimonP. HosmerD. BazinM. ScottFernando MontesI. Y. LeeK. SieglYukie MaedaM. MatosLaurens KeekJ. Pereira

subject

PhysicsReaction rateChemical substanceSuperconducting cyclotronOrders of magnitude (time)Radiative captureFlow (psychology)Analytical chemistryGeneral Physics and Astronomyrp-processNuclear Experiment

description

An approach is presented 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 (57)Cu(p,γ)(58)Zn reaction are deduced by populating states in (58)Zn 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 (57)Cu(p,γ) reaction rate by several orders of magnitude. The effective lifetime of (56)Ni, an important waiting point in the rp process in x-ray bursts, can now be determined entirely from experimentally constrained reaction rates.

yearjournalcountryeditionlanguage
2014-07-14Physical Review Letters
https://doi.org/10.1103/physrevlett.113.032502