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Electric quadrupole moment of the neutron-rich 33Al

Abstract : The nuclear electric quadrupole moment (Q moment) of the neutron-rich nucleus 33Al (I = 5/2, T1/2 = 41ms) has been measured by the β-ray detected nuclear quadrupole resonance (β-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 β-NQR spectrum was successfully obtained.
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Submitted on : Monday, November 2, 2009 - 10:25:56 AM
Last modification on : Thursday, December 17, 2020 - 4:24:04 PM

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T. Nagatomo, K. Shimada, K. Asahi, D.L. Balabanski, J.M. Daugas, et al.. Electric quadrupole moment of the neutron-rich 33Al. The Fifth International Conference on Exotic Nuclei and Atomic Masses ENAM'08, Sep 2008, Ryn, Poland. pp.383-385, ⟨10.1140/epja/i2009-10885-3⟩. ⟨in2p3-00429231⟩

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