Absolute level widths inAl27below 4 MeV

Abstract
A nuclear self-absorption measurement was carried out on the nucleus Al27 with a bremsstrahlung photon-beam endpoint energy of 4.2 MeV. For a number of states, commonly used as calibration standards in photon-scattering (NRF) experiments, the self absorption was measured. Thereby the level widths and lifetimes were determined absolutely. In addition it was found that the level energy of the 2212.01-keV level deviates from the literature value.