6533b824fe1ef96bd12815e7
RESEARCH PRODUCT
Characterization of a neutron-beta counting system with beta-delayed neutron emitters
V. GorlychevDmitry GorelovW. GelletlyM. B. Gómez-hornillosJuho RissanenZs. PodolyákD. Cano-ottG. CortesR. Caballero-folchIain MooreAnu KankainenP. J. R. MasonC. Domingo-pardoAntti SaastamoinenA. RiegoJ. L. TainTommi EronenF. CalviñoAri JokinenT. MartinezB. RubioM. D. JordanHeikki PenttiläMikael ReponenC. PretelAriel Tarifeño-saldiviaAriel Tarifeño-saldiviaE. ValenciaA. AlgoraA. AlgoraA. R. GarcíaH. HakalaJ. AgramuntL. KucukF. AlbiolV. Kolhinensubject
Nuclear and High Energy PhysicsNeutron emissionAstrophysics::High Energy Astrophysical PhenomenaNuclear TheoryMontecarlo Mètode de01 natural sciencesSelf-triggered digital data acquisition systemNuclear physicsNeutron and beta counters0103 physical sciencesGeant4 simulationsNeutron cross sectionNeutron detectionNeutronself-triggered digital data acquisition system010306 general physicsNuclear ExperimentInstrumentationBeta-delayed neutron emission probabilityPhysicsBonner spherebeta-delayed neutron emission probability:Energies::Energia nuclear [Àrees temàtiques de la UPC]Neutronsta114ta213010308 nuclear & particles physicsNeutron stimulated emission computed tomographyNeutron temperatureMonte Carlo method:Física::Física molecular [Àrees temàtiques de la UPC]Delayed neutronneutron and beta countersdescription
Abstract A new detection system for the measurement of beta-delayed neutron emission probabilities has been characterized using fission products with well known β-delayed neutron emission properties. The setup consists of BELEN-20, a 4π neutron counter with twenty 3He proportional tubes arranged inside a large polyethylene neutron moderator, a thin Si detector for β counting and a self-triggering digital data acquisition system. The use of delayed-neutron precursors with different neutron emission windows allowed the study of the effect of energy dependency on neutron, β and β–neutron rates. The observed effect is well reproduced by Monte Carlo simulations. The impact of this dependency on the accuracy of neutron emission probabilities is discussed. A new accurate value of the neutron emission probability for the important delayed-neutron precursor 137I was obtained, P n = 7.76 ( 14 ) %.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-01-21 |