{"id":347,"date":"2019-01-22T16:34:33","date_gmt":"2019-01-22T14:34:33","guid":{"rendered":"http:\/\/magneticmoments.info\/wp\/?p=347"},"modified":"2019-01-22T16:38:03","modified_gmt":"2019-01-22T14:38:03","slug":"paper-interplay-between-nuclear-shell-evolution-and-shape-deformation-revealed-by-the-magnetic-moment-of-75cu","status":"publish","type":"post","link":"https:\/\/magneticmoments.info\/wp\/?p=347","title":{"rendered":"[paper] Interplay between nuclear shell evolution and shape deformation revealed by the magnetic moment of <sup>75<\/sup>Cu"},"content":{"rendered":"<p><em>Interplay between nuclear shell evolution and shape deformation revealed by the magnetic moment of <sup>75<\/sup>Cu<\/em><\/p>\n<p>Y. Ishikawa et al.<br \/>\n Nature Physics (2019)<br \/>\n DOI: <a href=\"https:\/\/doi.org\/10.1038\/s41567-018-0410-7\">10.1038\/s41567-018-0410-7<\/a><\/p>\n<p>Exotic nuclei are characterized by having a number of neutrons (or protons) in excess relative to stable nuclei. Their shell structure, which represents single-particle motion in a nucleus, may vary due to nuclear force and excess neutrons, in a phenomenon called shell evolution. This effect could be counterbalanced by collective modes causing deformations of the nuclear surface. Here, we study the interplay between shell evolution and shape deformation by focusing on the magnetic moment of an isomeric state of the neutron-rich nucleus <sup>75<\/sup>Cu. We measure the magnetic moment using highly spin-controlled rare-isotope beams and achieve large spin alignment via a two-step reaction scheme that incorporates an angular-momentum-selecting nucleon removal. By combining our experiments with numerical simulations of many-fermion correlations, we find that the low-lying states in <sup>75<\/sup>Cu are, to a large extent, of single-particle nature on top of a correlated <sup>74<\/sup>Ni core. We elucidate the crucial role of shell evolution even in the presence of the collective mode, and within the same framework we consider whether and how the double magicity of the <sup>78<\/sup>Ni nucleus is restored, which is also of keen interest from the perspective of nucleosynthesis in explosive stellar processes.<\/p>\n<p><img loading=\"lazy\" style=\"vertical-align: middle;\" src=\"https:\/\/i0.wp.com\/magneticmoments.info\/wp\/wp-content\/uploads\/2019\/01\/cu75.png?resize=520%2C342\" alt=\"\" width=\"520\" height=\"342\" data-recalc-dims=\"1\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Interplay between nuclear shell evolution and shape deformation revealed by the magnetic moment of 75Cu Y. Ishikawa et al. Nature Physics (2019) DOI: 10.1038\/s41567-018-0410-7 Exotic nuclei are characterized by having a number of neutrons (or protons) in excess relative to&#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":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[1],"tags":[24,8,306,150],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p6YIb0-5B","jetpack-related-posts":[{"id":126,"url":"https:\/\/magneticmoments.info\/wp\/?p=126","url_meta":{"origin":347,"position":0},"title":"[paper] Magnetic moments of K isomers as indicators of octupole collectivity","date":"Jun 10, 2012","format":false,"excerpt":"Magnetic moments of K isomers as indicators of octupole collectivity N. 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Here we report on unique access\u2026","rel":"","context":"In &quot;g factor&quot;","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":45,"url":"https:\/\/magneticmoments.info\/wp\/?p=45","url_meta":{"origin":347,"position":3},"title":"[paper] Shape coexistence near the N=38 shell gap: Magnetic moment of the 981.6 keV J&pi;=8+ level in 72As","date":"Oct 20, 2010","format":false,"excerpt":"Shape coexistence near the N=38 shell gap: Magnetic moment of the 981.6 keV J\u03c0=8+ level in 72As D. 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