Spin and Magnetic Moment of Mg-33: Evidence for a Negative-Parity Intruder Ground State - INSPIRE

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Spin and Magnetic Moment of Mg-33: Evidence for a Negative-Parity Intruder Ground State

D.T. Yordanov
(
- Leuven U.
)
,
M. Kowalska
(
- Mainz U., Inst. Phys. and
- CERN
)
,
K. Blaum
(
- Mainz U., Inst. Phys.
)
,
M. De Rydt
(
- Leuven U.
)
,
K.T. Flanagan
(
- Leuven U. and
- CERN
)

Nov 23, 2007

4 pages

Published in:

Phys.Rev.Lett. 99 (2007) 212501

DOI:

10.1103/PhysRevLett.99.212501

View in:

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Abstract: (APS)

We report on the first determination of the nuclear ground-state spin of Mg33, I=3/2, and its magnetic moment, μ=−0.7456(5) μN, by combining laser spectroscopy with nuclear magnetic resonance techniques. These values are inconsistent with an earlier suggested 1 particle-1 hole configuration and provide evidence for a 2 particle-2 hole intruder ground state with negative parity. The results are in agreement with an odd-neutron occupation of the 3/2 [321] Nilsson orbital at a large prolate deformation. The discussion emphasizes the need of further theoretical and experimental investigation of the island of inversion, a region previously thought to be well understood.

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