1 research outputs found
A measurement of the 4He(g,n) reaction from 23 < Eg < 70 MeV
A comprehensive set of 4He(g,n) absolute cross-section measurements has been
performed at MAX-lab in Lund, Sweden. Tagged photons from 23 < Eg < 70 MeV were
directed toward a liquid 4He target, and neutrons were identified using
pulse-shape discrimination and the Time-of-flight Technique in two
liquid-scintillator detector arrays. Seven-point angular distributions have
been measured for fourteen photon energies. The results have been subjected to
complementary Transition-coefficient and Legendre-coefficient analyses. The
results are also compared to experimental data measured at comparable photon
energies as well as Recoil-Corrected Continuum Shell Model, Resonating Group
Method, and Effective Interaction Hyperspherical-Harmonic Expansion
calculations. For photon energies below 29 MeV, the angle-integrated data are
significantly larger than the values recommended by Calarco, Berman, and
Donnelly in 1983.Comment: 16 pages, 14 figures, some more revisions, submitted to Physical
Review