Revised and extended level scheme of the doubly-odd nucleus {sup 188}Ir

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.024310· OSTI ID:21068115

Jungclaus, A; Modamio, V; Egido, J L; Fernandez, M A ^[1]; Schwengner, R ^[2]; Algora, A ^[3]; Bazzacco, D; Lenzi, S; Marginean, N; Ur, C A ^[4]; Escrig, D ^[5]; Fraile, L M ^[6]; Martinez, T; Napoli, D R ^[7]

---

1. Departamento de Fisica Teorica C-XI, Universidad Autonoma de Madrid, E-28049 Madrid (Spain)
2. Institut fuer Strahlenphysik, Forschungszentrum Dresden-Rossendorf, D-01314 Dresden (Germany)
3. IFIC, CSIC-Univ.Valencia, E-46071 Valencia (Spain)
4. Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova (Italy)
5. Instituto de Estructura de la Materia, CSIC, E-28040 Madrid (Spain)
6. CERN, ISOLDE, CH-1211 Geneva 23 (Switzerland)
7. Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Italy)

High-spin states in the doubly odd Z=77 nucleus {sup 188}Ir were studied using the reaction {sup 186}W({sup 7}Li, 5n) at 59 MeV and the GASP spectrometer for {gamma}-ray detection. The level structures recently suggested to be built on the known 4.1(3) ms isomeric state of this nucleus have been considerably revised and extended and an isomer with a lifetime of 17.7(2) ns has been identified within the main decay sequence. In addition two rotational bands built on low spin states below the ms isomer have been observed for the first time. The basic features of the excitation scheme of {sup 188}Ir are discussed within the Hartree-Fock-Bogoliubov theory within the Lipkin-Nogami approach with the finite-range density-dependent Gogny force.

• OSTI ID: 21068115
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 77; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EXCITATION
GAMMA DETECTION
HARTREE-FOCK-BOGOLYUBOV THEORY
HIGH SPIN STATES
IRIDIUM 188
ISOMERIC NUCLEI
LIFETIME
LITHIUM 7 REACTIONS
MEV RANGE
NUCLEAR DECAY
NUCLEAR FORCES
NUCLEAR STRUCTURE
ROTATIONAL STATES
SPIN
TUNGSTEN 186 TARGET