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dc.contributor.authorHalcrow, C J
dc.contributor.authorManton, N S
dc.date.accessioned2020-12-23T06:32:37Z
dc.date.available2020-12-23T06:32:37Z
dc.date.issued2020-12
dc.identifier.issn1742-6588
dc.identifier.otherjpcs_1643_1_012136
dc.identifier.otherj16431136
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/315518
dc.description.abstractAbstract: 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+ state is a 2-phonon, E-manifold excitation, whereas the lowest 2+ and 2− 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−. 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.
dc.languageen
dc.publisherIOP Publishing
dc.rightsAttribution 3.0 Unported (CC BY 3.0)en
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en
dc.subjectPaper
dc.titleTetrahedral intrinsic structure of Oxygen-16 revisited
dc.typeArticle
dc.date.updated2020-12-23T06:32:37Z
prism.issueIdentifier1
prism.publicationNameJournal of Physics: Conference Series
prism.volume1643
dc.identifier.doi10.17863/CAM.62625
rioxxterms.versionofrecord10.1088/1742-6596/1643/1/012136
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/3.0/
dc.identifier.eissn1742-6596


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Attribution 3.0 Unported (CC BY 3.0)
Except where otherwise noted, this item's licence is described as Attribution 3.0 Unported (CC BY 3.0)