2-Way Esr Cavity For Magnetic-Dipole And Electric-Dipole Transitions

A two-way ESR cavity for magnetic dipole transition (MDT) and electric dipole transition (EDT) was manufactured. There are two openings to fit the sample cell for MDT or EDT in the cylindrical TE(011) mode. One opening is located on the axis of the cavity and the other is located away from the axis. The ESR spectra of the mixture of oxygen and nitrogen oxide obtained when the sample cell was inserted in each of the openings showed the selective transition of the MDT or of the EDT of the species.