https://doi.org/10.1140/epja/i2007-10436-0
Regular Article - Theoretical Physics
Structure of low-spin states in the doubly-odd 182Ir nucleus
1
Institut de Physique Nucléaire, IN2P3-CNRS/Université Paris-Sud, F-91406, Orsay cedex, France
2
Departamento de Fısica, Comisión Nacional de Energıa Atómica, Buenos Aires, Argentina
3
CONICET, Buenos Aires, Argentina
4
Escuela de Ciencia y Tecnologıa, Universidad de San Martın, Argentina
5
Institut de Physique Nucléaire, Université Claude Bernard Lyon-1, F-69622, Villeurbanne cedex, France
6
Institute of Experimental Physics, Warsaw University, Hoza 69, PL-00-681, Warsaw, Poland
7
Laboratoire de Physique Subatomique et de Cosmologie, IN2P3-CNRS/Université Joseph Fourier, F-38026, Grenoble cedex, France
8
Institut de Recherches Subatomiques, F-67037, Strasbourg, France
* e-mail: hojman@tandar.cnea.gov.ar
Received:
3
May
2007
Accepted:
10
July
2007
Published online:
7
August
2007
Low-spin states of 182Ir were populated through the β+ /EC decay of 182Pt . Two strong E2 transitions were observed for the first time: a 25.7keV transition in 182Ir and a 34.0keV transition in Re of probable mass A = 178 . Spin and parity, I π = 3+ , are firmly assigned to the 182Ir ground state (g.s.). For the excited states, the parity is established and the spin determined or restricted. These assignments support most of the interpretations of the level structure previously suggested. The systematics for the known 5+ → 3+ transitions in π h 9/2 ⊗ ν 1/2-[521] bands is presented. Using a semi-microscopic two-quasiparticle axial-rotor coupling model, particle configurations have been attributed or suggested for most of the coupled states lying at low energy in 182Ir .
PACS: 21.10.Hw Spin, parity, and isobaric spin – / 23.20.Lv γ transitions and level energies – / 23.20.Nx Internal conversion and extranuclear effects – / 27.70.+q 150≤A≤189 –
© Società Italiana di Fisica and Springer-Verlag, 2007