MAGNETIC DIPOLE-MOMENTS NEAR SN-132 - MEASUREMENT ON ISOMERIC 11 2(-)STATES IN ODD-A TE-131 AND TE-133 BY NMR/ON/

On-line low temperature nuclear orientation (OLNO) experiments have be en performed on the odd-A Te isotopes Te-131 and Te-133 using the tech nique of nuclear magnetic resonance on oriented nuclei (NMR/ON). The m agnetic moments of the isomeric 11/2(-) states have been measured exte nding the known data on these states in the Te isotopes up to the neut ron shell closure at N = 82. The contribution to the 11/2(-) magnetic moment in Te-133 due to core polarisation is calculated using an RPA s hell model as well as corrections to the magnetic dipole operator caus ed by mesonic exchange currents. The neutron number dependence of the magnetic moments of the 11/2(-) isomers in heavy Te isotopes is discus sed in terms of particle-core coupling model (PCM) calculations, (C) 1 998 Elsevier Science B.V.