Measurement of the <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">He</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>3</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math>(n,γ<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mo>)</mo></mrow><mrow><mn>4</mn></mrow></msup></mrow></math>He cross section at thermal neutron energies

F. L. H. Wolfs; S. J. Freedman; J. E. Nelson; M. S. Dewey; G. L. Greene

doi:10.1103/PhysRevLett.63.2721

Measurement of the ${}^{3}{He}$ (n,γ $)^{4}$ He cross section at thermal neutron energies

F. L. H. Wolfs, S. J. Freedman, J. E. Nelson, M. S. Dewey, and G. L. Greene

Phys. Rev. Lett. 63, 2721 – Published 18 December 1989

Abstract

We have measured the cross section for radiative capture of thermal neutrons on ${}^{3}{He}$ . The measured cross section of 54±6 μb is used to estimate the astrophysical S factor for the reaction ${}^{3}{He}$ (p, $e^{+}$ ν $)^{4}$ He which gives rise to high-energy neutrinos from the Sun.