Gamow-Teller transitions to 64-Cu measured using the 64-Zn(t,3-He) reaction

Abstract

The 64-Zn(t,3-He) reaction has been studied using a secondary triton beam of 115 MeV/nucleon to extract the Gamow-Teller transition-strength distribution to 64-Cu. The results were compared with shell-model calculations using the pf-shell effective interactions KB3G and GXPF1A and with existing data from the 64-Zn(d,2-He) reaction. Whereas the experimental results exhibited good consistency, neither of the theoretical predictions managed to reproduce the data. The implications for electron-capture rates during late stellar evolution were investigated. The rates based on the theoretical strength distributions are lower by factors of 3.5-5 compared to the rates based on experimental strength distributions.

arXiv comment10 pages, 8 figures

References in corpus (16)

• Quantum Monte Carlo Calculations of Light Nuclei
• Shell-model calculations of stellar weak interaction rates: II. Weak rates for nuclei in the mass range A=45-65 in supernovae environment
• Nuclear weak-interaction processes in stars
• Shell model study of the isobaric chains A=50, A=51 and A=52
• The effective g_A in the pf-shell
• The consequences of nuclear electron capture in core collapse supernovae
• Shell model calculations of stellar weak interaction rates: I. Gamow-Teller distributions and spectra of nuclei in the mass range A=45-65
• Presupernova Evolution with Improved Rates for Weak Interactions
• Presupernova collapse models with improved weak-interaction rates
• The (t,3He) and (3He,t) reactions as probes of Gamow-Teller strength
• On the extraction of weak transition strengths via the (3He,t) reaction at 420 MeV
• Shape and structure of N=Z 64Ge; Electromagnetic transition rates from the application of the Recoil Distance Method to knock-out reaction
• Measurement of the Gamow-Teller Strength Distribution in 58Co via the 58Ni(t,3He) reaction at 115 MeV/nucleon
• Shape transition and oblate-prolate coexistence in N=Z fpg-shell nuclei
• Electron Capture Strength for {60,62}Ni and {58,60,62,64}Ni(p,n){58,60,62,64}Cu reactions at 134.3 MeV
• Gamow-Teller strengths in 24Na using the 24Mg(t,3He) reaction at 115 AMeV

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• Electron capture in stars
• Stellar electron-capture rates in pf-shell nuclei from quasiparticle random-phase approximation calculations
• Gamow-Teller Unit Cross Sections for (t,3He) and (3He,t) Reactions
• Impact of New Gamow-Teller Strengths on Explosive Type Ia Supernova Nucleosynthesis
• Spectroscopy of 13B via the 13C(t,3He) reaction at 115 AMeV
• Experimental Constraint on Stellar Electron-Capture Rates from the ${}^{88}\text{Sr}(t,{}^3\text{He}+\gamma ){}^{88}\text{Rb}$ reaction at 115 MeV/u