Quadrupole Interactions of the Short-lived -Emitter 16N in TiO2

Quadrupole interactions of 1 2 , 1 4 N in BN(hexagonal) crystal were studied by detecting β-NQR of 1 2 N and FT-NMR of 1 4 N, respectively. β-NMR of 1 6 N(I ϖ = 2-, T 1 / 2 = 7.13 s) in MgO crystal was detected to determine the magnetic moment to be ‖μ( 1 6 N: 2 - )‖ = (1.986 ′ 0.001) μ N . Also, the β-NQR's of 1 2 , 1 6 N in TiO 2 crystal were detected to be ‖Q( 1 6 N: 2 - )‖ = (17.9 ′ 1.7) mb. An abnormally small effective charge for neutrons is required to account for ‖Q( 1 6 N: 2 - )‖.