Title: Lifetime measurement of the six-quasiparticle isomer in 140Nd and evidence for an isomer above the 19/2 state in 139Nd.
Authors: Ferraton, M.; Bourgain, R.; Petrache, C. M.; Verney, D.; Ibrahim, F.; de Séréville, N.; Franchoo, S.; Lebois, M.; Viet, C. Phan; Sagui, L.; Stefan, I.; Clavelin, J. F.; Vilmay, M.
Abstract: The lifetime of the recently discovered six-quasiparticle (6-qp) isomer in 140Nd has been measured using the 126Te(18O, 4n) reaction and the pulsed-beam technique at the Institut de Physique Nucléaire (IPN) Orsay. The deduced lifetime of the 6-qp isomer in 140Nd 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 139Nd was observed, with an apparent half-life of 272(4)ns.
Subjects: ORSAY (France); FRANCE; QUASIPARTICLES; NUCLEAR isomers; NEODYMIUM; QUANTUM theory; PARTICLES (Nuclear physics)
Publication: European Physical Journal A -- Hadrons & Nuclei, 2008, Vol 35, Issue 2, p167
ISSN: 1434-6001
Publication type: Academic Journal
DOI: 10.1140/epja/i2007-10534-y

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

Ferraton, M.; Bourgain, R.; Petrache, C. M.; Verney, D.; Ibrahim, F.; de Séréville, N.; Franchoo, S.; Lebois, M.; Viet, C. Phan; Sagui, L.; Stefan, I.; Clavelin, J. F.; Vilmay, M.