The Application of a Magnetic Lens Spectrometer to the Measurement of Gamma-Radiation fromZn65andCo60

Abstract

A thin magnetic lens spectrometer for the investigation of gamma-ray spectra is described. The effect of the thickness of the radiator used for the production of photoelectrons and the influence of the earth's magnetic field are reported. Based on a calibration of the instrument by means of annihilation radiation and the F line of ThB, energy values of ${1.10}_6$ Mev for the gamma-ray of ${\mathrm{Zn}}^{65}$, and ${1.15}_5$ and ${1.31}_7$ Mev for the two lines of ${\mathrm{Co}}^{60}$ are obtained. The probable error is estimated as 0.5 percent.