Decay of a 19(-) isomeric state in Lu-156

Lewis, M.; Parr, E.; Page, R.; McPeake, C.; Joss, D.; Ali, F.; Auranen, K.; Briscoe, A.; Capponi, L.; Grahn, T.; Greenlees, P.; Henderson, J.; Herzan, A.; Jakobsson, U.; Julin, R.; Juutinen, S.; Konki, J.; Labiche, M.; Leino, M.; Mason, P.; Nyman, M.; O'Donnell, D.; Pakarinen, J.; Papadakis, P.; Partanen, J.; Peura, P.; Rahkila, P.; Revill, J.; Ruotsalainen, P.; Sandzelius, M.; Saren, J.; SAYGI, BAHADIR; Scholey, C.; Simpson, J.; Smith, J.; Smolen, M.; Sorri, J.; Stolze, S.; Thornthwaite, A.; Uusitalo, J.

doi:10.1103/physrevc.98.024302

Decay of a 19(-) isomeric state in Lu-156

Atıf İçin Kopyala

Lewis M. C., Parr E., Page R. D., McPeake C., Joss D. T., Ali F. A., ...Daha Fazla

PHYSICAL REVIEW C, cilt.98, sa.2, 2018 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 98 Sayı: 2
Basım Tarihi: 2018
Doi Numarası: 10.1103/physrevc.98.024302
Dergi Adı: PHYSICAL REVIEW C
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Ankara Üniversitesi Adresli: Hayır

Özet

A multiparticle spin-trap isomeric state having a half-life of 179(4) ns and lying 2601 keV above the yrast 10(+) state in Lu-156 has been discovered. The Lu-156 nuclei were produced by bombarding isotopically enriched Cd-106 targets with beams of Ni-58 ions, separated in flight using the gas-filled separator RITU and their decays were measured using the GREAT spectrometer. Analysis of the main decay path that populates yrast states observed previously suggests a spin-parity assignment of 19(-) for the isomeric state, which is consistent with isomeric states identified in the N = 85 isotones. Comparison with other decay paths in Lu-156 indicates that the [pi h(11/)(2)(-1) circle times nu h(9/2)]10(+) state at the bottom of the yrast sequence is likely to be the a-decaying isomeric state, with the [pi h(11/)(2)(-1) circle times nu f(7/2)]9(+) state lying 62 keV above it. The relative ordering of the lowest-lying 9(+) and 10(+) states is inverted in Lu-156 compared with its odd-odd isotones.