Photo-Production ofN17

Abstract

The delayed neutron activity associated with ${\mathrm{N}}^{17}$ has been produced by the x-ray irradiation of oxygen, the reaction being identified as ${\mathrm{O}}^{18}(\gamma ,p){\mathrm{N}}^{17}$. The threshold for this transmutation has been observed as 16.35±0.2 Mev, and the integrated cross section calculated to be 0.15±0.1 Mev-barn. The ${\mathrm{N}}^{17}$ produced was identified by measuring the neutron activity half-life as 4.15±0.1 sec.