RT Journal Article
T1 Total absorption γ-ray spectroscopy of the β-delayed neutron emitters 137 I and 95 Rb
A1 Guadilla, Victor
A1 Fraile Prieto, Luis Mario
A1 Vedia Fernández, María Victoria
A1 Martínez, Trinitario
AB The decays of the beta-delayed neutron emitters( 137)I and Rb-95 have been studied with the total absorption gamma-ray spectroscopy technique. The purity of the beams provided by the JYFLTRAP Penning trap at the ion guide isotope separator on-line facility in Jyvaskyla allowed us to carry out a campaign of isotopically pure measurements with the decay total absorption gamma-ray spectrometer, a segmented detector composed of 18 NaI(T1) modules. The contamination coming from the interaction of neutrons with the spectrometer has been carefully studied, and we have tested the use of time differences between prompt gamma rays and delayed neutron interactions to eliminate this source of contamination. Due to the sensitivity of our spectrometer, we have found a significant amount of beta intensity to states above the neutron separation energy that deexcite by gamma rays, comparable to the neutron emission probability. The competition between gamma deexcitation and neutron emission has been compared with Hauser-Feshbach calculations, and it can be understood as a nuclear structure effect. In addition, we have studied the impact of the beta-intensity distributions determined in this work on reactor decay heat and reactor antineutrino spectrum summation calculations. The robustness of our results is demonstrated by a thorough study of uncertainties and with the reproduction of the spectra of the individual modules and the module-multiplicity gated spectra. This work represents the state-of-the-art of our analysis methodology for segmented total absorption spectrometers.
PB American Physical Society
SN 2469-9985
YR 2019
FD 2019
LK https://hdl.handle.net/20.500.14352/88528
UL https://hdl.handle.net/20.500.14352/88528
LA eng
NO V. Guadilla, J. L. Tain, A. Algora, J. Agramunt, D. Jordan, M. Monserrate, A. Montaner-Pizá, E. Nácher, S. E. A. Orrigo, B. Rubio, E. Valencia, M. Estienne, M. Fallot, L. Le Meur, J. A. Briz, A. Cucoanes, A. Porta, T. Shiba, A.-A. Zakari-Issoufou, A. A. Sonzogni, J. Äystö, T. Eronen, D. Gorelov, J. Hakala, A. Jokinen, A. Kankainen, V. S. Kolhinen, J. Koponen, I. D. Moore, H. Penttilä, I. Pohjalainen, J. Reinikainen, M. Reponen, S. Rinta-Antila, K. Rytkönen, V. Sonnenschein, A. Voss, L. M. Fraile, V. Vedia, E. Ganioğlu, W. Gelletly, M. Lebois, J. N. Wilson, and T. Martinez, Phys. Rev. C 100, 044305 (2019).
NO Ministerio de Economía, Comercio y Empresa (España)
NO Ministerio de Educación, Formación Profesional y Deportes (España)
NO European Commission
NO Consejo Superior de Investigaciones Científicas
NO Science and Technology Facilities Council (Reino Unido)
NO Academy of Finland
DS Docta Complutense
RD 6 abr 2025