Effective neutron capture cross section and half-life of ¹⁵⁵Eu

Abstract

The half-life of 155 Eu has been measured to be 4.65 ± 0.20 years and the absorption cross section has been found to be 4040 ± 125 b by a depletion method using a Ge(Li) detector. The sample of 155 Eu was irradiated in the NRU pneumatic carrier where the flux has a small epithermal component. These values are very different from values of [Formula: see text] years and σ ~ 13 000 b reported previously.