Various Isomers in Doubly Odd I Isotopes

Various Isomers in Doubly Odd I Isotopes

Isomeric states (Isomers) in odd-odd ^(120)I, ^(122)I, and ^(124)I nuclei have been investigated using in-beam gamma-ray spectroscopy with the ^(118)Sn (^6Li, 4n), ^(120)Sn (^7Li, 5n), and ^(122)Sn (^7Li, 5n) reactions at E_(lab) = 48, 58, and 54 MeV, respectively. Several isomers with half-lives ranging from a few nanoseconds to tens of microseconds have been identified for the first time and the absolute excited energies have been established by linking the low- and high-spin levels through the feeding and decay of the isomers in these nuclei. The properties of the isomers have been discussed in terms of spin traps and high-K isomerism based on two-quasiparticle configurations. The systematics for the absolute excitation energies of the J^π = 7^- and 8^- high-K isomers based on the πg_(9/2) υh_(11/2) configuration are presented for ^(116)I to ^(124)I and compared with the 9/2^+ states in the neighboring odd-A I isotopes.

Isomeric states (Isomers) in odd-odd ^(120)I, ^(122)I, and ^(124)I nuclei have been investigated using in-beam gamma-ray spectroscopy with the ^(118)Sn (^6Li, 4n), ^(120)Sn (^7Li, 5n), and ^(122)Sn (^7Li, 5n) reactions at E_(lab) = 48, 58, and 54 MeV, respectively. Several isomers with half-lives ranging from a few nanoseconds to tens of microseconds have been identified for the first time and the absolute excited energies have been established by linking the low- and high-spin levels through the feeding and decay of the isomers in these nuclei. The properties of the isomers have been discussed in terms of spin traps and high-K isomerism based on two-quasiparticle configurations. The systematics for the absolute excitation energies of the J^π = 7^- and 8^- high-K isomers based on the πg_(9/2) υh_(11/2) configuration are presented for ^(116)I to ^(124)I and compared with the 9/2^+ states in the neighboring odd-A I isotopes.