Academic Journal
Reorientation-effect measurement of the first 2+ state in 12C : Confirmation of oblate deformation
| العنوان: | Reorientation-effect measurement of the first 2+ state in 12C : Confirmation of oblate deformation |
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| المؤلفون: | Kumar Raju, M., Orce, J. N., Navrátil, P., Ball, G C, Drake, T E, Triambak, S., Hackman, G., Pearson, C. J., Abrahams, K. J., Akakpo, E. H., Al-Falou, H., Churchman, R. M., Cross, D. S., Djongolov, M. K., Erasmus, B F N, Finlay, P, Garnsworthy, A. B., Garrett, P. E., Jenkins, D. G., Kshetri, R., Leach, K. G., Masango, S., Mavela, D. L., Mehl, C. V., Mokgolobotho, M. J., Ngwetsheni, C., O'Neill, E G, Rand, E.T., Sjue, S. K. L., Sumithrarachchi, C. S., Svensson, C. E., Tardiff, E. R., Williams, S. J., Wong, J. |
| سنة النشر: | 2018 |
| المجموعة: | White Rose Research Online (Universities of Leeds, Sheffield & York) |
| الوصف: | A Coulomb-excitation reorientation-effect measurement using the TIGRESS γ−ray spectrometer at the TRIUMF/ISAC II facility has permitted the determination of the 〈21 +‖E2ˆ‖21 +〉 diagonal matrix element in 12C from particle−γ coincidence data and state-of-the-art no-core shell model calculations of the nuclear polarizability. The nuclear polarizability for the ground and first-excited (21 +) states in 12C have been calculated using chiral NN N4LO500 and NN+3NF350 interactions, which show convergence and agreement with photo-absorption cross-section data. Predictions show a change in the nuclear polarizability with a substantial increase between the ground state and first excited 21 + state at 4.439 MeV. The polarizability of the 21 + state is introduced into the current and previous Coulomb-excitation reorientation-effect analyses of 12C. Spectroscopic quadrupole moments of QS(21 +)=+0.053(44) eb and QS(21 +)=+0.08(3) eb are determined, respectively, yielding a weighted average of QS(21 +)=+0.071(25) eb, in agreement with recent ab initio calculations. The present measurement confirms that the 21 + state of 12C is oblate and emphasizes the important role played by the nuclear polarizability in Coulomb-excitation studies of light nuclei. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | text |
| اللغة: | English |
| Relation: | https://eprints.whiterose.ac.uk/126689/1/1_s2.0_S0370269317309863_main.pdf; Kumar Raju, M., Orce, J. N., Navrátil, P. et al. (31 more authors) (2018) Reorientation-effect measurement of the first 2+ state in 12C : Confirmation of oblate deformation. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. pp. 250-254. ISSN 0370-2693 |
| DOI: | 10.1016/j.physletb.2017.12.009 |
| الاتاحة: | https://eprints.whiterose.ac.uk/126689/ https://eprints.whiterose.ac.uk/126689/1/1_s2.0_S0370269317309863_main.pdf https://doi.org/10.1016/j.physletb.2017.12.009 |
| Rights: | cc_by |
| رقم الانضمام: | edsbas.CE41D04E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.physletb.2017.12.009 |
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