Naslov
Monte Carlo simulations and n-p differential scattering data measured with Proton Recoil Telescopes

Autori
Terranova, N. ; ... ; Bosnar, Damir ; ... ; Žugec, Petar

Kolaboracija
N_TOF Collaboration

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
EPJ Web of Conferences 239 / Ge, Z. ; Shu, N. ; Chen, Y. ; Wang, W. ; Zhang, H. - : EDP Sciences, 2020, 1-5

ISBN
978-2-7598-9107-8

Skup
International Conference on Nuclear Data for Science and Technology (ND 2019)

Mjesto i datum
Peking, Kina, 19.05.2019. - 24.05.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
n_TOF, proton recoil, Monte Carlo simulations, neutron time of flight

Sažetak
The neutron-induced fission cross section of 235U, a standard at thermal energy and between 0.15 MeV and 200 MeV, plays a crucial role in nuclear technology applications. The long-standing need of improving cross section data above 20 MeV and the lack of experimental data above 200 MeV motivated a new experimental campaign at the n_TOF facility at CERN. The measurement has been performed in 2018 at the experimental area 1 (EAR1), located at 185 m from the neutron-producing target (the experiment is presented by A. Manna et al. in a contribution to this conference). The 235U(n, f) cross section from 20 MeV up to about 1 GeV has been measured relative to the 1H(n, n)1H reaction, which is considered the primary reference in this energy region. The neutron flux impinging on the 235U sample (a key quantity for determining the fission events) has been obtained by detecting recoil protons originating from n-p scattering in a C2H4 sample. Two Proton Recoil Telescopes (PRT), consisting of several layers of solid-state detectors and fast plastic scintillators, have been located at proton scattering angles of 25.07° and 20.32°, out of the neutron beam. The PRTs exploit the ΔE-E technique for particle identification, a basic requirement for the rejection of charged particles from neutron-induced reactions in carbon. Extensive Monte Carlo simulations were performed to characterize proton transport through the different slabs of silicon and scintillation detectors, to optimize the experimental set-up and to deduce the efficiency of the whole PRT detector. In this work we compare measured data collected with the PRTs with a full Monte Carlo simulation based on the Geant-4 toolkit.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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