Halcrow, CJ and Manton, NS (2020) Tetrahedral intrinsic structure of Oxygen-16 revisited. In: Journal of Physics: Conference Series. 27th International Nuclear Physics Conference (INPC2019), 29 Jul - 02 Aug 2019, Glasgow, UK. IOP Publishing
Abstract
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.
Metadata
Item Type: | Proceedings Paper |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | This is protected by copright. All rights reserved. This is an open access article under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Pure Mathematics (Leeds) |
Funding Information: | Funder Grant number Leverhulme Trust ECF-2017-639 |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 May 2021 14:36 |
Last Modified: | 25 Jun 2023 22:39 |
Status: | Published |
Publisher: | IOP Publishing |
Identification Number: | 10.1088/1742-6596/1643/1/012136 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:174232 |
Download
Filename: Halcrow_2020_J._Phys.__Conf._Ser._1643_012136.pdf
Licence: CC-BY 3.0