Hyperfine structure measurements in ⁷⁵As, ³¹P and ⁵³Cr

Energy intervals in ⁷⁵As, ³¹P and ⁵³Cr ground state hyperfine multiplets have been measured using the techniques of atomic beam magnetic resonance. Values for the interaction constants have been found which are consistent with all measured intervals to within the experimental errors. The results are for ⁷⁵As: A = -66.204(1) mc/s, B = -0.535(3) mc/s, g_J = -1.9965(8); for ³¹P: A = +55.061(10) mc/s, g_J = -2.00165(40); and for ⁵³Cr: A = -82.5994(16) mc/s and B = +0.008(12) mc/s.