Experiments

KT - nuclear physics and particle physics

KT.KRB - Nuclear Reaction Analysis at the Accelerator

This experiment is currently not available.

In this experiment we use the 500 keV ion accelerator of the 2nd Institute of Physics to evaluate the nuclear reaction between energetic protons and a target containing the boron isotope B-11. The exothermic reaction is a fusion to excited C-12, which in turn decays into 3 alpha particles with energies up to 6 MeV: B-11(p,2α)α. The targets are thin films of B and BN on Silicon. At first we measure the areal density of B in these targets using Rutherford Backscattering with 800 keV He2+ ions. We then use 400 keV protons to measure the total reaction cross sections for the B-11(p,α)Be-8 and the B-11(p,2α)α reaction channels and calculate the observed alpha energies. We also determine the extremely short half live of the 1st exited state of 8-Be. We compare the cross sections with published data from the Janis data bank of cross sections provided by OECD and Nuclear energy agency.

Location:
II. Physikalisches Institut, D-1.122
Languages:
D