GT strengths and electron-capture rates for pf-shell nuclei of relevance for late stellar evolution

Abstract

This paper presents a systematic evaluation of the ability of theoretical models to reproduce experimental Gamow-Teller transition strength distributions measured via (n,p)-type charge-exchange reactions at intermediate beam energies. The focus is on transitions from stable nuclei in the pf shell (45<A<64). The impact of deviations between experimental and theoretical Gamow-Teller strength distributions on derived stellar electron-capture rates at densities and temperatures of relevance for Type Ia and Type II supernovae is investigated. The theoretical models included in the study are based on the shell-model, using the KB3G and GXPF1a interactions, and quasiparticle random-phase approximation (QRPA) using ground-state deformation parameters and masses from the finite-range droplet model.

25 pages, 27 figures

References in corpus (8)

• Theory of Core-Collapse Supernovae
• Superallowed 0+ to 0+ nuclear beta decays: A new survey with precision tests of the conserved vector current hypothesis and the standard model
• On the extraction of weak transition strengths via the (3He,t) reaction at 420 MeV
• Stellar electron-capture rates calculated with the finite-temperature relativistic random-phase approximation
• Measurement of the Gamow-Teller Strength Distribution in 58Co via the 58Ni(t,3He) reaction at 115 MeV/nucleon
• Gamow-Teller Unit Cross Sections for (t,3He) and (3He,t) Reactions
• Gamow-Teller transitions to 64-Cu measured using the 64-Zn(t,3-He) reaction
• 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

Cited by in corpus (43)

• Origin of the Heaviest Elements: the Rapid Neutron-Capture Process
• Strong neutrino cooling by cycles of electron capture and ${\beta }^{-}$ decay in neutron star crusts
• All the Fun of the FAIR: Fundamental physics at the Facility for Antiproton and Ion Research
• Shell model predictions for ${}^{124}$Sn double-beta decay
• Nuclear Physics of the Outer Layers of Accreting Neutron Stars
• Shell model studies of the ${}^{130}Te$ neutrinoless double-beta decay
• The Sensitivity of Core-Collapse Supernovae to Nuclear Electron Capture
• Neutrino-nucleus reactions and their role for supernova dynamics and nucleosynthesis
• Astrophysical weak-interaction rates for selected $A=20$ and $A=24$ nuclei
• Electron capture in stars
• Shell model analysis of competing mechanism to the double-beta decay of ${}^{48}$Ca
• Stellar electron-capture rates in pf-shell nuclei from quasiparticle random-phase approximation calculations
• Time-reversed particle-vibration loops and nuclear Gamow-Teller response
• Neutrino-pair emission from nuclear de-excitation in core-collapse supernova simulations
• Modification of the Brink-Axel Hypothesis for High Temperature Nuclear Weak Interactions
• Impact of New Gamow-Teller Strengths on Explosive Type Ia Supernova Nucleosynthesis
• Unblocking of stellar electron capture for neutron-rich $N=50$ nuclei at finite temperature
• Mass measurement of 56Sc reveals a small A=56 odd-even mass staggering, implying a cooler accreted neutron star crust
• Stellar electron capture rates on neutron-rich nuclei and their impact on core-collapse
• Nucleosynthesis in core-collapse supernova explosions triggered by a quark-hadron phase transition
• Trends in Nuclear Astrophysics
• Sensitivity of Type Ia supernovae to electron capture rates
• $Abinitio$ calculations for Gamow-Teller strengths in $sd$ shell
• Stellar electron capture rates based on finite temperature relativistic quasiparticle random-phase approximation
• Constraints for stellar electron-capture rates on ${}^{86}$Kr via the ${}^{86}$Kr($t$,${}^3$He$+\gamma$)${}^{86}$Br reaction and the implications for core-collapse supernovae
• Nuclear Weak Rates and Nuclear Weak Processes in Stars
• Shell model description of Gamow-Teller strengths in $pf$-shell nuclei
• Contribution of excited states to stellar weak-interaction rates in odd-A nuclei
• 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
• Description of ${}^{93}$Nb stellar electron-capture rates by the Projected Shell Model
• Investigation of Gamow Teller Transition Properties in 56-64Ni Isotopes Using QRPA Methods
• Beta decay and electron capture rates on manganese isotopes in astrophysical environments
• Nuclear Weak Rates and Detailed Balance in Stellar Conditions
• Study of Gamow-Teller strength and associated weak-rates on odd-A nuclei in stellar matter
• Validity of Brink Axel Hypothesis for calculations of allowed stellar weak rates of heavy nuclei
• Impact of the Brink Axel Hypothesis on Unique First Forbidden \b{eta} transitions for r process nuclei
• Lepton capture rates due to isotopes of vanadium in astrophysical environment
• The Great Wall: Urca Cooling Layers in the Accreted NS Crust
• Weak interaction rates of $sd$-shell Urca pairs in stellar environment using a shell-model approach
• Stellar ${\beta }^{-}$-decay rate of ${}^{63}$Ni and its impact on the $s$-process nucleosynthesis in massive stars
• Lepton emission rates of 43-64V isotopes under stellar conditions
• Investigation of weak-rates for odd-A nuclei for presupernova simulations
• Neutrinos, Rare Isotopes of Exotic Nuclei and Nuclear Astrophysics