6533b858fe1ef96bd12b6ccf

RESEARCH PRODUCT

Decay of Neutron-Rich Mn Nuclides and Deformation of Heavy Fe Isotopes

M. HannawaldT. KautzschA. WöhrW. B. WaltersK.-l. KratzV. N. FedoseyevV. I. MishinW. BöhmerB. PfeifferV. SebastianY. JadingU. KösterJ. LettryH. L. RavnNull The Isolde Collaboration

subject

PhysicsIsotopeSHELL modelFOS: Physical sciencesGeneral Physics and AstronomyIonizationQuasiparticleNuclear Physics - ExperimentNeutronNuclideNuclear Experiment (nucl-ex)Atomic physicsSpectroscopyNuclear Experiment

description

The use of chemically selective laser ionization combined with beta-delayed neutron counting at CERN/ISOLDE has permitted identification and half-life measurements for 623-ms Mn-61 up through 14-ms Mn-69. The measured half-lives are found to be significantly longer near N=40 than the values calculated with a QRPA shell model using ground-state deformations from the FRDM and ETFSI models. Gamma-ray singles and coincidence spectroscopy has been performed for Mn-64 and Mn-66 decays to levels of Fe-64 and Fe-66, revealing a significant drop in the energy of the first 2+ state in these nuclides that suggests an unanticipated increase in collectivity near N=40.

yearjournalcountryeditionlanguage
1998-12-21Physical Review Letters
https://doi.org/10.1103/physrevlett.82.1391