EPJ Web Conf.
Volume 146, 2017ND 2016: International Conference on Nuclear Data for Science and Technology
|Number of page(s)||5|
|Section||Nuclear Masses, Structure and Decay Data Measurements|
|Published online||13 September 2017|
Total absorption spectroscopy of fission fragments relevant for reactor antineutrino spectra
1 SUBATECH, CNRS/IN2P3, Université de Nantes, Ecole des Mines de Nantes, 44307 Nantes, France
2 IFIC (CSIC-Univ. Valencia), Valencia, Spain
3 Department of Physics, University of Surrey, Guildford GUZ7XH, UK
4 Helsinki Institute of Physics, 00014 University of Helsinki, Finland
5 Universitat Politécnica de Catalunya (UPC), 08034 Barcelona, Spain
6 CIEMAT, Madrid, Spain
7 Department of Physics, PO Box 35, 40014 University of Jyväskylä, Finland
8 Argonne National Laboratory, Argonne, USA
9 National Physical Laboratory, Teddington, Middlesex TW11 0LW, UK
10 RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
11 National Nuclear Data Center, Brookhaven National Laboratory, Upton NY 11973-5000, USA
12 Faculty of Physics, Ludwig-Maximilians University Munich, Am Coulombwall 1, 85748 Garching, Germany
13 MTA ATOMKI, Hungary
14 Petersburg Nuclear Physics Institute, 188300 Gatchina, Russia
15 Universidad Complutense, Grupo de Física Nuclear, CEI Moncloa, 28040 Madrid, Spain
16 United Kingdom Atomic Energy Authority, Culham Science Centre, Abingdon OX14 3DB, UK
17 Department of Physics, Istanbul University, 34134 Istanbul, Turkey
18 Institut de Physique Nucléaire d’Orsay, CNRS/IN2P3, 91406 Orsay, France
19 Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
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Published online: 13 September 2017
The accurate determination of reactor antineutrino spectra remains a very active research topic for which new methods of study have emerged in recent years. Indeed, following the long-recognized reactor anomaly (measured antineutrino deficit in short baseline reactor experiments when compared with spectral predictions), the three international reactor neutrino experiments Double Chooz, Daya Bay and Reno have recently demonstrated the existence of spectral distortions in their measurements with respect to the same predictions. These spectral predictions were obtained through the conversion of integral beta-energy spectra obtained at the ILL research reactor. Several studies have shown that the underlying nuclear physics required for the conversion of these spectra into antineutrino spectra is not totally understood. An alternative to such converted spectra is a complementary approach that consists of determining the antineutrino spectrum by means of the measurement and processing of nuclear data. The beta properties of some key fission products suffer from the pandemonium effect which can be circumvented by the use of the Total Absorption Gamma-ray Spectroscopy technique (TAGS). The two main contributors to the Pressurized Water Reactor antineutrino spectrum in the region where the spectral distortion has been observed are 92Rb and 142Cs, which have been measured at the radioactive beam facility of the University of Jyväskylä in two TAGS experiments. We present the results of the analysis of the TAGS measurements of the β-decay properties of 92Rb along with preliminary results on 142Cs and report on the measurements already performed.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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