TY - JOUR
T1 - Quadrupole moments of neutron-deficient 20,21Na
AU - Minamisono, K.
AU - Matsuta, K.
AU - Minamisono, T.
AU - Levy, C. D.P.
AU - Nagatomo, T.
AU - Ogura, M.
AU - Sumikama, T.
AU - Behr, J. A.
AU - Jackson, K. P.
AU - Mihara, M.
AU - Fukuda, M.
N1 - Funding Information:
The authors would like to thank P.F. Mantica and B.A. Brown at NSCL/MSU for valuable discussions and are grateful to the TRIUMF staff. The study was supported in part by the 21th century COE program ‘Towards a new basic science: Depth and synthesis’. One of the authors (K.M. at NSCL/MSU) would like to thank the support from the National Science Foundation, Grant PHY06-06007.
PY - 2009/2/16
Y1 - 2009/2/16
N2 - The electric-quadrupole coupling constant of the ground states of the proton drip line nucleus 20Na (Iπ = 2+, T1 / 2 = 447.9 ms) and the neutron-deficient nucleus 21Na (Iπ = 3 / 2+, T1 / 2 = 22.49 s) in a hexagonal ZnO single crystal were precisely measured to be | e q Q / h | = 690 ± 12 kHz and 939 ± 14 kHz, respectively, using the multi-frequency β-ray detecting nuclear magnetic resonance technique under presence of an electric-quadrupole interaction. An electric-quadrupole coupling constant of 27Na in the ZnO crystal was also measured to be | e q Q / h | = 48.4 ± 3.8 kHz. The electric-quadrupole moments were extracted as | Q (20Na) | = 10.3 ± 0.8 e fm2 and | Q (21Na) | = 14.0 ± 1.1 e fm2, using the electric-coupling constant of 27Na and the known quadrupole moment of this nucleus as references. The present results are well explained by shell-model calculations in the full sd-shell model space.
AB - The electric-quadrupole coupling constant of the ground states of the proton drip line nucleus 20Na (Iπ = 2+, T1 / 2 = 447.9 ms) and the neutron-deficient nucleus 21Na (Iπ = 3 / 2+, T1 / 2 = 22.49 s) in a hexagonal ZnO single crystal were precisely measured to be | e q Q / h | = 690 ± 12 kHz and 939 ± 14 kHz, respectively, using the multi-frequency β-ray detecting nuclear magnetic resonance technique under presence of an electric-quadrupole interaction. An electric-quadrupole coupling constant of 27Na in the ZnO crystal was also measured to be | e q Q / h | = 48.4 ± 3.8 kHz. The electric-quadrupole moments were extracted as | Q (20Na) | = 10.3 ± 0.8 e fm2 and | Q (21Na) | = 14.0 ± 1.1 e fm2, using the electric-coupling constant of 27Na and the known quadrupole moment of this nucleus as references. The present results are well explained by shell-model calculations in the full sd-shell model space.
KW - β-ray detecting nuclear magnetic resonance
KW - β-ray detecting quadrupole resonance
KW - Na
KW - Na
KW - Electric-coupling constant
KW - Quadrupole moment
KW - Shell model
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U2 - 10.1016/j.physletb.2009.01.006
DO - 10.1016/j.physletb.2009.01.006
M3 - Article
AN - SCOPUS:58749096142
SN - 0370-2693
VL - 672
SP - 120
EP - 125
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 2
ER -