Structure of high-lying levels populated in the Y-96 -> Zr-96 beta decay

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.

[img] Text
1-s2.0-S0370269321005098-main.pdf - Published version

Download (568kB) | Preview


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
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: