Mashtakov, KR, Ponomarevc, V Yu, Scheck, M, Finch, SW, Isaak, J, Zweidinger, M, Agar, O, Bathia, C, Beck, T, Beller, J et al (show 25 more authors)
(2021)
Structure of high-lying levels populated in the Y-96 -> Zr-96 beta decay.
PHYSICS LETTERS B, 820.
p. 136569.
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Abstract
The nature of the high-lying final levels of the 96Ygs β decay, one of the three most important contributors to the high-energy reactor antineutrino spectrum, has been investigated in high-resolution γ-ray spectroscopy following the β decay as well as in a campaign of inelastic photon scattering experiments. The comprehensive approach establishes 1− levels associated with the Pygmy Dipole Resonance as high-lying final levels in the β decay. Branching ratios extracted from β decay complement photon scattering and allow the absolute E1 excitation strength to be determined for levels populated in both reactions. The combined data represents a comprehensive approach to the wavefunction of the 1− levels below the Qβ value, which are investigated in the Quasiparticle Phonon Model. The calculations reveal that the components populated in β decay contribute only with small amplitudes to the complex wavefunction of these 1− levels. A comparison of the β decay results to data from total absorption γ-ray spectroscopy demonstrates a good agreement between both measurements.
| Item Type: | Article |
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| Uncontrolled Keywords: | High resolution gamma-ray spectroscopy, Pygmy dipole resonance, Reactor antineutrino anomaly, Quasi-particle phonon model |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 16 Nov 2021 08:46 |
| Last Modified: | 18 Jan 2023 21:24 |
| DOI: | 10.1016/j.physletb.2021.136569 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3143198 |
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