α clustering in ²⁸Si probed through the identification of high-lying 0⁺ states
| dc.contributor.author | Adsley, P. | en_ZA |
| dc.contributor.author | Jenkins, D. G. | en_ZA |
| dc.contributor.author | Cseh, J. | en_ZA |
| dc.contributor.author | Dimitriova, S. S. | en_ZA |
| dc.contributor.author | Brummer, J. W. | en_ZA |
| dc.contributor.author | Li, K. C. W. | en_ZA |
| dc.contributor.author | Marin-Lambarri, D. J. | en_ZA |
| dc.contributor.author | Lukyanov, K. | en_ZA |
| dc.contributor.author | Kheswa, N. Y. | en_ZA |
| dc.contributor.author | Neveling, R. | en_ZA |
| dc.contributor.author | Papka, P. | en_ZA |
| dc.contributor.author | Pellegri, L. | en_ZA |
| dc.contributor.author | Pesudo, V. | en_ZA |
| dc.contributor.author | Pool, L. C. | en_ZA |
| dc.contributor.author | Riczu, G. | en_ZA |
| dc.contributor.author | Smit, F. D. | en_ZA |
| dc.contributor.author | Van Zyl, J. J. | en_ZA |
| dc.contributor.author | Zemlyanaya, E. | en_ZA |
| dc.date.accessioned | 2018-11-06T13:38:15Z | |
| dc.date.available | 2018-11-06T13:38:15Z | |
| dc.date.issued | 2017 | |
| dc.description | CITATION: Adsley, P., et al. 2017. α clustering in ²⁸Si probed through the identification of high-lying 0⁺ states. Physical Review C, 95(2):1-8, doi:10.1103/PhysRevC.95.024319. | |
| dc.description | The original publication is available at https://journals.aps.org/prc | |
| dc.description.abstract | Background: Aspects of the nuclear structure of light α-conjugate nuclei have long been associated with nuclear clustering based on α particles and heavier α-conjugate systems such as ¹²C and ¹⁶O. Such structures are associated with strong deformation corresponding to superdeformed or even hyperdeformed bands. Superdeformed bands have been identified in ⁴⁰Ca and neighboring nuclei and find good description within shell model, mean-field, and α-cluster models. The utility of the α-cluster description may be probed further by extending such studies to more challenging cases comprising lighter α-conjugate nuclei such as ²⁴Mg, ²⁸Si, and ³²S. Purpose: The purpose of this study is to look for the number and energy of isoscalar 0⁺ states in ²⁸Si. These states are the potential bandheads for superdeformed bands in ²⁸Si corresponding to the exotic structures of ²⁸Si. Of particular interest is locating the 0⁺ bandhead of the previously identified superdeformed band in ²⁸Si. Methods: α-particle inelastic scattering from a natSi target at very forward angles including 0∘ has been performed at the iThemba Laboratory for Accelerator-Based Sciences in South Africa. Scattered particles corresponding to the excitation energy region of 6 to 14 MeV were momentum-analysed in the K600 magnetic spectrometer and detected at the focal plane using two multiwire drift chambers and two plastic scintillators. Results: Several 0⁺ states have been identified above 9 MeV in ²⁸Si. A newly identified 9.71 MeV 0⁺ state is a strong candidate for the bandhead of the previously discussed superdeformed band. The multichannel dynamical symmetry of the semimicroscopic algebraic model predicts the spectrum of the excited 0⁺ states. The theoretical prediction is in good agreement with the experimental finding, supporting the assignment of the 9.71-MeV state as the bandhead of a superdeformed band. Conclusion: Excited isoscalar 0⁺ states in ²⁸Si have been identified. The number of states observed in the present experiment shows good agreement with the prediction of the multichannel dynamical symmetry. | en_ZA |
| dc.description.uri | https://journals.aps.org/prc/abstract/10.1103/PhysRevC.95.024319 | |
| dc.description.version | Publisher's version | |
| dc.format.extent | 8 pages | |
| dc.identifier.citation | Adsley, P., et al. 2017. α clustering in ²⁸Si probed through the identification of high-lying 0⁺ states. Physical Review C, 95(2):1-8, doi:10.1103/PhysRevC.95.024319 | |
| dc.identifier.issn | 2469-9993 (online) | |
| dc.identifier.issn | 2469-9985 (print) | |
| dc.identifier.other | doi:10.1103/PhysRevC.95.024319 | |
| dc.identifier.uri | http://hdl.handle.net/10019.1/104650 | |
| dc.language.iso | en_ZA | en_ZA |
| dc.publisher | American Physical Society | |
| dc.rights.holder | American Physical Society | |
| dc.subject | Nuclear structure | en_ZA |
| dc.subject | Excited state chemistry | en_ZA |
| dc.subject | O+ states | en_ZA |
| dc.subject | Nuclear shapes | en_ZA |
| dc.subject | Cluster theory (Nuclear physics) | en_ZA |
| dc.title | α clustering in ²⁸Si probed through the identification of high-lying 0⁺ states | en_ZA |
| dc.type | Article | en_ZA |