Linear polarization and directional distribution of gamma-rays from oriented¹⁷²Lu

Conclusions

The gamma-ray linear polarization data in combination with the results of the directional distribution measurements were used to determine precise values of the multipole mixing ratios of the gamma-transitions in the¹⁷²Yb nucleus. A detailed analysis of the deduced mixing ratios, supplemented by previous data, lends support to the following description of the two-quasiparticle excitations of¹⁹²Yb (see also tab. 6): 2073 keVK ^π = (4⁺) {p 4041 ↓ + p 411 ↓} + {n 514↓ − n 521↓} 1663 keVK ^π = (3⁺) {n 514↓ − n 521↓} + {n 512↑ − n 521↓} 1172 keVK ^π = 3⁺ {n 512↑ + n 521↓} + {p404↓ − P 411↓} A supporting evidence has also been given to the spin-parity assignments of the 1640 keV (I ^π = 4⁻) and 1706 keV (I ^π = 5⁻) members of theK ^π = 4⁻ band.