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dc.contributor.authorHalcrow, CJ
dc.contributor.authorManton, NS
dc.date.accessioned2022-01-28T16:37:11Z
dc.date.available2022-01-28T16:37:11Z
dc.date.issued2020-12-01
dc.identifier.issn1742-6588
dc.identifier.otherjpcs_1643_1_012136
dc.identifier.otherj16431136
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/333179
dc.description.abstract<jats:title>Abstract</jats:title> <jats:p>A model for vibrational and rotational excitations of an intrinsic tetrahedral structure of the Oxygen-16 nucleus has been investigated, building on classic work of Wheeler, Dennison and Robson. Tetrahedral A- and F-phonons are treated harmonically, but the E-phonon dynamics is extended to dynamics on an E-manifold of configurations of four α-particles. This allows for tunnelling between the tetrahedral configuration and its dual, through a square configuration, and lifts the parity doubling that would otherwise occur. Unlike in earlier models, including the algebraic cluster model, the E-phonon frequency is taken to be about half the F-phonon frequency, which in turn is about half the A-phonon frequency. As a result, the first-excited 0<jats:sup>+</jats:sup> state is a 2-phonon, E-manifold excitation, whereas the lowest 2<jats:sup>+</jats:sup> and 2<jats:sup>−</jats:sup> states are 1-phonon, E-manifold excitations. Coriolis contributions to the rotational energy of states with F-phonons are significant. Altogether, rotational bands are constructed based on vibrational states with up to four phonons, and with spin/parity up to 9<jats:sup>−</jats:sup>. Nearly all the observed states of Oxygen-16 are accommodated, up to 20 MeV and partly beyond. Predictions for some so far unobserved states, especially those of unnatural parity, are made.</jats:p>
dc.languageen
dc.publisherIOP Publishing
dc.subjectPaper
dc.titleTetrahedral intrinsic structure of Oxygen-16 revisited
dc.typeArticle
dc.date.updated2022-01-28T16:37:11Z
prism.issueIdentifier1
prism.publicationNameJournal of Physics: Conference Series
prism.volume1643
dc.identifier.doi10.17863/CAM.80602
rioxxterms.versionofrecord10.1088/1742-6596/1643/1/012136
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/3.0/
dc.identifier.eissn1742-6596
cam.issuedOnline2020-12-23


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