Electromagnetic transition from the 4${}^{+}$ to 2${}^{+}$ resonance in ${}^8$Be measured via the radiative capture in ${}^4$He+${}^4$He

Abstract

An earlier measurement on the 4${}^{+}$ to 2${}^{+}$ radiative transition in ${}^8$Be provided the first electromagnetic signature of its dumbbell-like shape. However, the large uncertainty in the measured cross section does not allow a stringent test of nuclear structure models. The present paper reports a more elaborate and precise measurement for this transition, via the radiative capture in the ${}^4$He+${}^4$He reaction, improving the accuracy by about a factor of three. The {\it ab initio} calculations of the radiative transition strength with improved three-nucleon forces are also presented. The experimental results are compared with the predictions of the alpha cluster model and {\it ab initio} calculations.

arXiv comment5 pages and 7 figures, Submitted to Physical Review Letters

References in corpus (6)

• An accurate nucleon-nucleon potential with charge-independence breaking
• Quantum Monte Carlo calculations of A=8 nuclei
• Quantum Monte Carlo calculations of neutron-alpha scattering
• Quantum Monte Carlo calculations of electromagnetic moments and transitions in A <= 9 nuclei with meson-exchange currents derived from chiral effective field theory
• Quantum Monte Carlo calculations of electroweak transition matrix elements in A = 6,7 nuclei
• Direct observation of 4+ to 2+ gamma transition in 8Be

Cited by in corpus (24)

• Microscopic Clustering in Light Nuclei
• Nucleon and nucleon-pair momentum distributions in A <= 12 nuclei
• Particle Physics Models for the 17 MeV Anomaly in Beryllium Nuclear Decays
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• Chiral Effective Field Theory Calculations of Weak Transitions in Light Nuclei
• Quasielastic lepton scattering and back-to-back nucleons in the short-time approximation
• Emergence of rotational bands in ab initio no-core configuration interaction calculations of the Be isotopes
• Cluster structure of light nuclei
• Quantum Monte Carlo calculations of electromagnetic transitions in 8Be with meson-exchange currents derived from chiral effective field theory
• Charge-symmetry breaking forces and isospin mixing in 8Be
• An above-barrier narrow resonance in ${}^{15}$F
• Electron scattering on $\mathbf{A}=3$ nuclei from quantum Monte Carlo based approaches
• Microscopic particle-rotor model for low-lying spectrum of Lambda hypernuclei
• Collective rotation from ab initio theory
• Probing ab initio emergence of nuclear rotation
• Ab initio calculation of the $\beta$ decay spectrum of ${}^6$He
• Fission dynamics, dissipation and clustering at finite temperature
• Effects of rotation and valence nucleons in molecular-like $\alpha$-chain nuclei
• Electromagnetic Transition Strengths for Light Nuclei in the Skyrme model
• Resonant and Scattering States in the $\alpha +\alpha$ System from the Non-Localized Cluster Model
• Quasielastic Electromagnetic Scattering Cross Sections and World Data Comparisons in the {\fontfamily{qcr}\selectfont GENIE} Monte Carlo Event Generator
• Broad resonances and beta-decay
• Towards modeling cluster structure of ${}^8$Be with chiral interaction
• R-matrix analysis of elastic scattering, phase shift and radiative capture reaction cross sections in the $\alpha +\alpha$ system