MAGNETIC DIPOLE AND ELECTRIC QUADRUPOLE MOMENTS OF FIRST 2+-STATE OF SM-154

The hyperfine interactions of the first excited 2+ state of Sm154 have been measured in SmCl3 and SmIG at 4.2°K, using the Mössbauer effect following Coulomb excitation. The results in SmCl36H2O have been used to determine the magnetic dipole and electric quadrupole moments 154=(0.778±0.036)N and Q154(1-R)=-1.33±0.46 b, respectively 154 has been used to determine Heff=3.04±0.12 MG in SmIG at 4.2°K. This value for Heff (SmIG) agrees with the value used by Atzmony et al. to measure gR152 in SmIG; thus their value for gR152 is confirmed. An improved technique for using the Mössbauer effect following Coulomb excitation is reported. © 1969 The American Physical Society.