γ-Ray multiplicity in 239Pu fission induced by resonance neutrons: experimental evidence for the (n, γf) reaction

Ryabov, Yu. V.; Trochon, J.; Shackleton, D.; Fréhaut, J.

doi:10.1016/0375-9474(73)90475-2

Cited by 21 publications

(2 citation statements)

References 9 publications

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“…Moreover, a boron-loaded plastic material was used to reduce this neutron capture background due to room return. The 10 B (n,α) 7 Li reaction is efficient to sharply reduce the flux of low-energy neutrons and thus the capture rate inside the BGO. The counterpart of the (n,α) reaction is the emission of a 477.6-keV γ ray that added to the lowenergy background, in an energy range however where the signal to background ratio is very good.…”

Section: Setup and Experimental Conditionsmentioning

confidence: 99%

“…Prompt fission γ rays were first experimentally studied in the 1960s and the 1970s [1,2]. In spontaneous, thermal, and resonance neutron-induced fission, some measurements of the energy spectrum [3,4], of the mean multiplicity and the mean total energy (see for example [3][4][5][6][7]) were performed. Forty years later, a renewed interest is growing both on the experimental side [8][9][10][11] as well as on the theoretical one (see, e.g., Ref.…”

Section: Introductionmentioning

confidence: 99%

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First experimental prompt γ -ray spectra in fast-neutron-induced fission of U238

et al. 2018

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The knowledge of prompt fission γ-ray emission has been of major interest in reactor physics for a few years. Only few experimental spectra were published until now for fast-neutron-induced fission, and measurements would be also valuable in order to improve our understanding of the fission process. A simple experimental method was used to measure the first prompt fission γ-ray spectra up to 10 MeV. In this approach, the γ rays are measured with a bismuth germanate (BGO) detector which offers two significant advantages with respect to other γ-ray detectors: a high peak-to-total ratio and a high efficiency. The prompt fission neutrons are rejected by the time-of-flight technique between the BGO detector and a fission trigger given by a fission chamber. Prompt fission γ-ray spectra were measured for 1.6 ± 0.1, 5.1 ± 0.2 and 15.0 ± 0.6 MeV neutron-induced fission on 238 U at the CEA, DAM, DIF Van de Graaff accelerator; average multiplicity and mean photon energy per fission were deduced from the spectra.

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Section: Setup and Experimental Conditionsmentioning

confidence: 99%