I have received the following as a comment to the website. I strongly believe this is an important advocate of our website and motivation behind organizing it, as well as a good read for all people in the field of nuclear physics. Here it is:<\/p>\n
Dear Theo,<\/p>\n
I have previously relied on Nick Stone\u2019s compilation, but I am happy to have found your website with active updating of nuclear magnetic moments. This is why the internet is so wonderful, so I wish you luck in drawing attention to this valuable resource!
\nMaybe anyone interested in magnetic moments already understands this, but what I think is still missing from your website is indication of the importance of specifically the magnetic moments for a proper understanding of nuclear structure.<\/p>\n
On the one hand, the textbooks typically show the Schmidt Lines, together with data points indicating that most experimental values lie between the upper and lower values. Already by the early 1950s, the Schmidt lines clearly indicated that the independent-particle model was more-or-less valid, but there has been surprisingly little progress since then. Because the modern experimental data are precise up to 7 or 8 digits and classical electromagnetic theory is well understood, explanation of nuclear magnetic moments SHOULD be (but is not yet) an area where discrepancies between experiment and theory might be discussed with some clarity!<\/p>\n
On the other hand, theorists who calculate nuclear magnetic moments typically use model parameters that are adjusted to reproduce the experimental data. Adjusting the parameters of the nuclear models is entirely normal practice, but such modeling gives the impression that the magnetic moments are understood quantitatively, whereas the truth is considerably less optimistic. That \u201chard reality\u201d is not often acknowledged, I would say, but last year a Chinese physics journal, SCIENCE CHINA, was rather straight-forward in stating the continuing problems in explaining nuclear magnetic moments.<\/p>\n
http:\/\/esciencenews.com\/articles\/2010\/12\/23\/nuclear.magnetic.moments<\/p>\n
In explaining why they were to publish a Special Issue devoted to nuclear moments, the Editors noted that:
\n\u201cthe extension of these [nuclear] models to the study of nuclear magnetic moments is quite limited and unsatisfactory. The magnetic dipole moments of most atomic nuclei throughout the periodic table still remain unexplained and the under-lying physics mechanism is not fully understood\u2026.\u201d<\/p>\n
And, among the invited reviews of theoretical work that were eventually published, Akito Arima went through the usual explanation of the Schmidt lines, and even cited the good agreement between experiment and theory for a few selected nuclei from his own work published in\u2026. 1954!<\/p>\n
I would guess that you are not interested in getting into abstruse theoretical discussions on your web-site, but I think some indication of the current lack of theoretical understanding of nuclear magnetic moments would indicate why nuclear moments are indeed an important topic!<\/p>\n
Cheers
\nNorman<\/p>\n
N.D.Cook<\/p>\n","protected":false},"excerpt":{"rendered":"
I have received the following as a comment to the website. I strongly believe this is an important advocate of our website and motivation behind organizing it, as well as a good read for all people in the field of...<\/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":[1],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p6YIb0-1f","jetpack-related-posts":[{"id":128,"url":"https:\/\/magneticmoments.info\/wp\/?p=128","url_meta":{"origin":77,"position":0},"title":"[paper] Hyperfine structure anomaly and magnetic moments of neutron deficient Tl isomers with I=9\/2","date":"Jul 18, 2012","format":false,"excerpt":"Hyperfine structure anomaly and magnetic moments of neutron deficient Tl isomers with I=9\/2 A.E. Barzakh et al. doi: 10.1103\/PhysRevC.86.014311 The hyperfine structure of 276.9-nm atomic transition has been studied by the resonant ionization spectroscopy method at mass-separator IRIS (Investigation of Radioactive Isotopes on Synchrocyclotron), Petersburg Nuclear Physics Institute (PNPI) for\u2026","rel":"","context":"In "experiment"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":426,"url":"https:\/\/magneticmoments.info\/wp\/?p=426","url_meta":{"origin":77,"position":1},"title":"Reexamination of nuclear magnetic dipole and electric quadrupole moments of polonium isotopes","date":"Feb 17, 2024","format":false,"excerpt":"Leonid V. Skripnikov and Anatoly E. Barzak DOI: 10.1103\/PhysRevC.109.024315 Abstract We reexamined the electronic structure parameters used to interpret the hyperfine structure of neutral polonium. We used a computational scheme that treats relativistic and high-order electronic correlation effects within the coupled cluster with single, double, triple, and perturbative quadruple excitations\u2026","rel":"","context":"In "g factor"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":24,"url":"https:\/\/magneticmoments.info\/wp\/?p=24","url_meta":{"origin":77,"position":2},"title":"[paper] Nuclear structure of the even-even argon isotopes with a focus on magnetic moments","date":"May 18, 2009","format":false,"excerpt":"Nuclear structure of the even-even argon isotopes with a focus on magnetic moments S.J.Q. Robinson et al. 10.1103\/PhysRevC.79.054322\" We study the role of configuration mixing in the heavier even-even isotopes of argon. We begin by limiting the configurations of the even-even Ar isotopes to (d3\/22)&pi\u2002(f7\/2n)\u03bd. There, due to the particular\u2026","rel":"","context":"In "theory"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":180,"url":"https:\/\/magneticmoments.info\/wp\/?p=180","url_meta":{"origin":77,"position":3},"title":"[preprint] Populating Low-Spin States in Radioactive Nuclei to Measure Magnetic Moments Using the Transient Field Technique","date":"Jan 17, 2016","format":false,"excerpt":"Populating Low-Spin States in Radioactive Nuclei to Measure Magnetic Moments Using the Transient Field Technique D.A. Torres and F. Ram\u00edrez arXiv: 1601.03602 The experimental study of magnetic moments for nuclear states near the ground state, I\u22652, provides a powerful tool to test nuclear structure models. The study of magnetic moments\u2026","rel":"","context":"In "experiment"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":198,"url":"https:\/\/magneticmoments.info\/wp\/?p=198","url_meta":{"origin":77,"position":4},"title":"An update of the nuclear moments update: masses and charge radii","date":"May 25, 2016","format":false,"excerpt":"For those of you who are following my blog or twitter feed, what I am about to say is not quite new. I have already made a comment a couple of weeks ago regarding the last update of the database I administer. The database contains non-evaluated, experimentally deduced values of\u2026","rel":"","context":"In "g factor"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":303,"url":"https:\/\/magneticmoments.info\/wp\/?p=303","url_meta":{"origin":77,"position":5},"title":"Probing Sizes and Shapes of Nobelium Isotopes by Laser Spectroscopy","date":"Jun 10, 2018","format":false,"excerpt":"Until recently, ground-state nuclear moments of the heaviest nuclei could only be inferred from nuclear spectroscopy, where model assumptions are required. Laser spectroscopy in combination with modern atomic structure calculations is now able to probe these moments directly, in a comprehensive and nuclear-model-independent way. Here we report on unique access\u2026","rel":"","context":"In "g factor"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/posts\/77"}],"collection":[{"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=77"}],"version-history":[{"count":1,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/posts\/77\/revisions"}],"predecessor-version":[{"id":78,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/posts\/77\/revisions\/78"}],"wp:attachment":[{"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=77"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=77"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=77"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}