Electric quadrupole moment of the neutron-rich
- T. Nagatomo
- K. Shimada
- K. Asahi
- D. L. Balabanski
- J. M. Daugas
- M. Depuydt
- M. De Rydt
- L. Gaudefroy
- S. Grévy
- Y. Hasama
- Y. Ichikawa
- D. Kameda
- P. Morel
- L. Perrot
- C. Stödel
- J. C. Thomas
- W. Vanderheijden
- N. Vermeulen
- P. Vingerhoets
- A. Yoshimi
- G. Neyens
- H. Ueno
Publication date
October 2009
DOI Publisher
Springer Science and Business Media LLCAbstract
The nuclear electric quadrupole moment (Q moment) of the neutron-rich nucleus 33Al (I = 5/2 , T 1/2 = 41 ms) has been measured by the $ \beta$ -ray detected nuclear quadrupole resonance ($ \beta$ -NQR) method for the first time. The 33Al nucleus is considered to be on the border of the island of inversion within which a significant intrusion of the pf orbits occurs across the N = 20 shell gap and the intrusion causes an anomalous enhancement of the Q moment. Polarized 33Al nuclei were produced from 36S (77.5MeV/u beams through the fragmentation process and separated by LISE fragment separator at GANIL. The 33Al nuclei were implanted into a Al2O3 single-crystal plate and the $ \beta$ -NQR spectrum was successfully obtained
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