https://doi.org/10.1140/epjad/i2005-06-124-y
ENAM 2004
Voyage to the “Island of Inversion”: 29Na
1
Department of Physics, Florida State University, 32306, Tallahassee, FL, USA
2
National Superconducting Cyclotron Laboratory, Michigan State University, 48824, East Lansing, MI, USA
3
Department of Chemistry, Michigan State University, 48824, East Lansing, MI, USA
4
Department of Physics and Astronomy, Michigan State University, 48824, East Lansing, MI, USA
* e-mail: tripathi@nucmar.physics.fsu.edu
Received:
4
October
2004
Accepted:
29
March
2005
Published online:
29
June
2005
The low energy level structure of neutron-rich 28, 29Na has been investigated through β-delayed γ spectroscopy. The present work, which presents the first detailed spectroscopy of 29Na, clearly demonstrates that for Na isotopes between 28Na (N = 17) and 29Na (N = 18), intruder configurations start dominating the low lying excited states, suggestive of the small N = 20 shell gap.
PACS: 23.40.-s β decay; double β decay; electron and muon capture – / 23.20.Lv γ transitions and level energies – / 21.60.Cs shell model –
© Società Italiana di Fisica and Springer-Verlag, 2005