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Studying fission neutrons with 2E-2v and 2E
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Tillämpad kärnfysik.ORCID-id: 0000-0002-1233-0221
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Tillämpad kärnfysik.
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Tillämpad kärnfysik.ORCID-id: 0000-0002-9858-3341
European Commiss, Joint Res Ctr, Directorate G2, Geel, Belgium..
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2018 (engelsk)Inngår i: SCIENTIFIC WORKSHOP ON NUCLEAR FISSION DYNAMICS AND THE EMISSION OF PROMPT NEUTRONS AND GAMMA RAYS (THEORY-4) / [ed] Hambsch, FJ Carjan, N Rusko, I, 2018, artikkel-id UNSP 00002Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

This work aims at measuring prompt-fission neutrons at different excitation energies of the nucleus. Two independent techniques, the 2E-2v and the 2E techniques, are used to map the characteristics of the mass-dependent prompt fission neutron multiplicity, 7(A), when the excitation energy is increased. The VERDI 2E-2v spectrometer is being developed at JRC-GEEL. The Fission Fragment (FF) energies are measured using two arrays of 16 silicon (Si) detectors each. The FFs velocities are obtained by time-of-flight, measured between micro-channel plates (MCP) and Si detectors. With MCPs placed on both sides of the fission source, VERDI allows for independent timing measurements for both fragments. Cf-252(sf) was measured and the present results revealed particular features of the 2E-2v technique. Dedicated simulations were also performed using the GEF code to study important aspects of the 2E-2v technique. Our simulations show that prompt neutron emission has a non-negligible impact on the deduced fragment data and affects also the shape of 17(A). Geometrical constraints lead to a total-kinetic energy-dependent detection efficiency. The 2E technique utilizes an ionization chamber together with two liquid scintillator detectors. Two measurements have been performed, one of Cf-252(sf) and another one of thermal-neutron induced fission in U-235(n,f). Results from Cf-252(sf) are reported here.

sted, utgiver, år, opplag, sider
2018. artikkel-id UNSP 00002
Serie
EPJ Web of Conferences, ISSN 2100-014X ; 169
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Identifikatorer
URN: urn:nbn:se:uu:diva-361440DOI: 10.1051/epjconf/201816900002ISI: 000433153800001ISBN: 978-2-7598-9031-6 (digital)OAI: oai:DiVA.org:uu-361440DiVA, id: diva2:1269371
Konferanse
4th Scientific Workshop on Nuclear Fission Dynamics and the Emission of Prompt Neutrons and Gamma Rays (Theory), JUN 20-22, 2017, Varna, BULGARIA
Tilgjengelig fra: 2018-12-10 Laget: 2018-12-10 Sist oppdatert: 2019-02-28bibliografisk kontrollert

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