Spektroskopie der Protonen aus Kernreaktionen mit 14 MeV-Neutronen mit einem Zählrohrteleskop

Abstract

Protons from nuclear reactions induced by 14 MeV neutrons are studied by means of a telescope, consisting of three CO₂-flow counters and a surface barrier detector. The resolving power of this arrangement, tested with recoil protons is found to be 400 keV at 14 MeV, the efficiency (counts per incident neutron) being 3 · 10⁻⁷. From the measured energy spectra of the protons from the metals Ti, Fe, Ni and Zn in forward direction statistical theory parameters are evaluated. In the level density expression ρ(E_a)∼E ⁻ⁿ_a exp(2√aE_a) the exponentn=2, including angular momentum effects is found to be in better agreement with the experimental data than othern-values frequently used.