The signal produced in a monopole antenna by the gamma flux from a nuclear explosion

A monopole antenna is considered to be bombarded by a flux of gamma rays propagating normally to the axis of the antenna. As a result of this bombardment, electrons are scattered from the antenna, thus charging the antenna positively. This induces a current in the load impedance of the antenna-appearing as if the antenna were receiving a transient RF signal. An expression for the time dependent voltage across the load impedance of the antenna is obtained by considering that every electron scattered from the antenna never returns and that the antenna impedance and capacitance are their free-space values.