Precession of Positive Muons in Nickel and Iron

Abstract

Polarized ${\mu }^{+}$ were stopped in Ni and Fe. The magnetic fields at the site of the muons, the initial polarization, and the depolarization time constant were obtained from 300 to 700°K, i.e., through the Curie temperature of Ni. This experiment demonstrated that precession of muons stopped in ferromagnetic material can be observed and, and it determined what the magnitude of the internal fields are: $\approx 150$ G for Ni and 4000 G for Fe.