Magnetic moments of 21+states in124,126,128Sn

Z=50core stability inSn110from magnetic-moment and lifetime measurements

“…Magnetic moments of the 2 + 1 states were previously measured in the even-even stable 112−124 Sn isotopes [9,[11][12][13] as well as in radioactive 126,128 Sn [14,15]. However, experiments using transient field (TF) or recoil-invacuum techniques and beam energies both below and above the Coulomb barrier, yielded results which challenge comparisons with theoretical calculations.…”

First-excited state g factor of Te136 by the recoil in vacuum method

“…With the computer power available today, along with comprehensive atomic structure codes such as the multiconfiguration Hartree-Fock (MCHF) Atomic Structure Package [15,19] and GRASP2K [20], it has become reasonable to attempt ab initio calculations of the free-ion hyperfine interactions of relevance to RIV and magnetic moment measurements.…”

“…The RIV technique has proved to be a powerful method to measure the g factors of excited states of neutron-rich nuclei produced as radioactive beams, particularly in the tin and tellurium isotopes near the neutron-rich doubly magic nuclide 132 Sn [12][13][14][15][16]. One of the method's advantages is that the g factor of the 2 + 1 state can be measured simultaneously with the B(E2; 0 + → 2 + ) and Q(2 + ) [14][15][16][17][18].…”

“…One of the method's advantages is that the g factor of the 2 + 1 state can be measured simultaneously with the B(E2; 0 + → 2 + ) and Q(2 + ) [14][15][16][17][18]. Although the RIV method gives only the magnitude of the g factor, it has proven to give it more precisely [12,13,15] than the transient-field method [19,20] in the case of radioactive beam measurements where statistical precision is limited. The advantage of the transient-field method, however, is that it can determine the sign.…”

“…To date, the RIV method has been applied to stable and radioactive beams of the Sn and Te isotopes to determine the g factors of states with mean lifetimes in the range from τ ∼ 0.5 ps for 112,114,116 Sn [16] to τ ∼ 2.5 ps for 132 Te [12,13] and 128 Sn [15]. In these measurements the RIV interaction could be calibrated empirically [13] or semiempirically [12-15, 15, 16], with similar results [12,13,21].…”