Thermal neutron captures on $d$ and ${}^3$He

Abstract

We report on a study of the $nd$ and $n{}^3$He radiative captures at thermal neutron energies, using wave functions obtained from either chiral or conventional two- and three-nucleon realistic potentials with the hyperspherical harmonics method, and electromagnetic currents derived in chiral effective field theory up to one loop. The predicted $nd$ and $n{}^3$He cross sections are in good agreement with data, but exhibit a significant dependence on the input Hamiltonian. A comparison is also made between these and new results for the $nd$ and $n{}^3$He cross sections obtained in the conventional framework for both potentials and currents.

4 pages, 4 eps figures; references added; corrections to text and abstract as suggested by referee added

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• Optical potential from first principles
• Implication of the proton-deuteron radiative capture for Big Bang Nucleosynthesis
• Modern Ab Initio Approaches and Applications in Few-Nucleon Physics with A \ge 4
• Chiral Effective Field Theory Calculations of Weak Transitions in Light Nuclei
• Power Counting of Contact-Range Currents in Effective Field Theory
• Electromagnetic Structure of Few-Nucleon Ground States
• Nuclear Currents in Chiral Effective Field Theory
• Quasielastic lepton scattering and back-to-back nucleons in the short-time approximation
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• Local chiral interactions and magnetic structure of few-nucleon systems
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• Ab initio calculation of the $\beta$ decay spectrum of ${}^6$He
• Parity violation in low energy neutron deuteron scattering
• Efficacy of the symmetry-adapted basis for ab initio nucleon-nucleus interactions for light- and intermediate-mass nuclei
• Ab initio translationally invariant nucleon-nucleus optical potentials
• Time Reversal Invariance Violation in Neutron Deuteron Scattering
• Quasielastic Electromagnetic Scattering Cross Sections and World Data Comparisons in the {\fontfamily{qcr}\selectfont GENIE} Monte Carlo Event Generator
• Measurement of the ${}^2$H($p,\gamma$)${}^3$He S-factor at 265-1094keV
• Heavy-baryon chiral perturbation theory approach to thermal neutron capture on ${}^{3}He$
• Parity violation in radiative neutron capture on deuteron
• Corrections to nucleon capture cross sections computed in truncated Hilbert spaces
• Chiral Electroweak Currents in Nuclei
• The longitudinal response function of the deuteron in chiral effective field theory
• Cold Neutron-Deuteron Capture and Wigner-SU(4) Symmetry
• The n${}^3$He Experiment: Parity Violation in Polarized Neutron Capture on ${}^3$He