Lifetime measurement of the six-quasiparticle isomer in 140Nd and evidence for an isomer above the 19/2+ state in 139Nd

. The lifetime of the recently discovered six-quasiparticle (6-qp) isomer in 140 Nd has been measured using the 126 Te( 18 O, 4n) reaction and the pulsed-beam technique at the Institut de Physique Nucléaire (IPN) Orsay. The deduced lifetime of the 6-qp isomer in 140 Nd of 1.23(7)μs supports the 20 +...

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Published in:The European physical journal. A, Hadrons and nuclei Hadrons and nuclei, 2008, Vol.35 (2), p.167-170
Main Authors: Ferraton, M., Bourgain, R., Petrache, C. M., Verney, D., Ibrahim, F., de Séréville, N., Franchoo, S., Lebois, M., Phan Viet, C., Sagui, L., Stefan, I., Clavelin, J. F., Vilmay, M.
Format: Article
Language:English
Subjects:
Hadrons
Heavy Ions
Nuclear Experiment
Nuclear Fusion
Nuclear Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Regular Article - Experimental Physics
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Summary:. The lifetime of the recently discovered six-quasiparticle (6-qp) isomer in 140 Nd has been measured using the 126 Te( 18 O, 4n) reaction and the pulsed-beam technique at the Institut de Physique Nucléaire (IPN) Orsay. The deduced lifetime of the 6-qp isomer in 140 Nd of 1.23(7)μs supports the 20 + spin-parity assignment to the isomeric state which is based on a spherical configuration that coexists with the triaxial bands observed in this spin range. Evidence for delayed components for the transitions below the 19/2 + state in 139 Nd was observed, with an apparent half-life of 272(4)ns.
ISSN:1434-6001
1434-601X
DOI:10.1140/epja/i2007-10534-y