{"id":139,"date":"2009-02-16T14:23:00","date_gmt":"2009-02-16T11:23:00","guid":{"rendered":"http:\/\/magneticmoments.info\/wp\/?p=139"},"modified":"2013-06-04T13:28:13","modified_gmt":"2013-06-04T10:28:13","slug":"paper-quadrupole-moments-of-neutron-deficient-2021na","status":"publish","type":"post","link":"https:\/\/magneticmoments.info\/wp\/?p=139","title":{"rendered":"[paper] Quadrupole moments of neutron-deficient <sup>20,21<\/sup>Na"},"content":{"rendered":"<p><em>Quadrupole moments of neutron-deficient <sup>20,21<\/sup>Na<\/em><\/p>\n<p>K. Minamisono et al.<\/p>\n<p>doi: <a href=\"http:\/\/dx.doi.org\/10.1016\/j.physletb.2009.01.006\">10.1016\/j.physletb.2009.01.006<\/a><\/p>\n<p>The electric-quadrupole coupling constant of the ground states of the proton drip line nucleus <sup>20<\/sup>Na (I<sup>&pi;<\/sup>=2<sup>+<\/sup>, T<sub>1\/2<\/sub>=447.9 ms) and the neutron-deficient nucleus <sup>21<\/sup>Na (I<sup>&pi;<\/sup>=3\/2<sup>+<\/sup>, T<sub>1\/2<\/sub>=22.49 s) in a hexagonal ZnO single crystal were precisely measured to be |eqQ\/h|=690&plusmn;12 kHz and 939&plusmn;14 kHz, respectively, using the multi-frequency &beta;-ray detecting nuclear magnetic resonance technique under presence of an electric-quadrupole interaction. An electric-quadrupole coupling constant of <sup>27<\/sup>Na in the ZnO crystal was also measured to be |eqQ\/h|=48.4&plusmn;3.8 kHz. The electric-quadrupole moments were extracted as |Q(<sup>20<\/sup>Na)|=10.3&plusmn;0.8 efm<sup>2<\/sup> and |Q(<sup>21<\/sup>Na)|=14.0&plusmn;1.1 efm<sup>2<\/sup>, using the electric-coupling constant of <sup>27<\/sup>Na 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.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Quadrupole moments of neutron-deficient 20,21Na K. Minamisono et al. doi: 10.1016\/j.physletb.2009.01.006 The electric-quadrupole coupling constant of the ground states of the proton drip line nucleus 20Na (I&pi;=2+, T1\/2=447.9 ms) and the neutron-deficient nucleus 21Na (I&pi;=3\/2+, T1\/2=22.49 s) in a hexagonal&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[3],"tags":[198,197,196,31],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p6YIb0-2f","jetpack-related-posts":[{"id":136,"url":"https:\/\/magneticmoments.info\/wp\/?p=136","url_meta":{"origin":139,"position":0},"title":"[paper] Erosion of N=20 shell in 33Al investigated through the ground-state electric quadrupole moment","date":"Aug 14, 2012","format":false,"excerpt":"Erosion of N=20 shell in 33Al investigated through the ground-state electric quadrupole moment K. Shimada et al. doi: 10.1016\/j.physletb.2012.07.030 Electric quadrupole moment Q of the ground state has been measured by means of \u03b2-NMR spectroscopy using a spin-polarized beam produced in a projectile fragmentation reaction. The obtained Q moment, |Qexp(33Al)|=132(16)\u2026","rel":"","context":"In &quot;experiment&quot;","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":18,"url":"https:\/\/magneticmoments.info\/wp\/?p=18","url_meta":{"origin":139,"position":1},"title":"[paper] Ground-state electric quadrupole moment of 31Al","date":"Feb 18, 2009","format":false,"excerpt":"Ground-state electric quadrupole moment of 31Al D. Nagae et al. The ground-state electric quadrupole moment of 31Al(I\u03c0=5\/2+,T1\/2=644(25) ms) has been measured by means of \u03b2-ray-detected nuclear magnetic resonance spectroscopy using a spin-polarized 31Al beam produced in the projectile fragmentation reaction. 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