Activation cross sections at an incident neutron energy of 14.4±0.3 MeV are measured for the ($n,2n$), ($n,p$), and ($n,\alpha$) reactions on isotopes of As, Br, Rb, and Sr, by using the mixed-powder method and $\gamma$ detection by Ge(Li) spectrometer. The use of a stoichiometric chemical compound as an alternative to the mixed-powder technique, where one of the constituents serves as the neutron flux monitor, is investigated and is recommended, whenever applicable, over all other methods for measurement of relative activation cross sections.

• Received 24 September 1970

DOI:https://doi.org/10.1103/PhysRevC.3.629