Gamma-rays from Muon Capture in 14 N

Many new -rays have been observed, following muon capture on 14 N. One had been reported before, and the low yield is confirmed, indicating that the nuclear structure of 14 N is still not understood. Gamma-rays from 13 C resulting from the reaction 14 N(µ − ,�n) 13 C compare favourably with states observed in the reaction 14 N(,p) 13 C. More precise energies are also given for the 7017 and 6730 keV -rays in 14 C.