Characterization of a mixed high-energy spallation neutron-proton field using monoisotopic activation detectors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F18%3A00493866" target="_blank" >RIV/61389005:_____/18:00493866 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26220/18:PU128652

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.nima.2018.07.009" target="_blank" >http://dx.doi.org/10.1016/j.nima.2018.07.009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nima.2018.07.009" target="_blank" >10.1016/j.nima.2018.07.009</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Characterization of a mixed high-energy spallation neutron-proton field using monoisotopic activation detectors

Popis výsledku v původním jazyce

We used monoisotopic Co, Au, and Bi threshold activation detectors to characterize the high-energy (> 5 MeV) portion of a mixed spallation neutron-proton (n/p) field. The field was produced by irradiating the natural uranium target-blanket subcritical assembly Quinta with 660-MeV protons from Phasotron accelerator at the Joint Institute for Nuclear Research (JINR) in Dubna. Experimental yields of the (n,x) and (p,x) reactions were compared to the calculated reaction rates, which represent the convolution of particle flux and reaction cross section. The flux was simulated using the radiation transport code MCNPX 2.7.0, and the cross sections were extracted from the following three sources: the intranuclear cascade model INCL4.2, the phenomenological spherical optical model from TALYS-1.8, and the evaluated nuclear data file TENDL-2015. We show that, in most cases, the evaluated data provide a closer agreement with the experimental data in comparison with INCL4.2 model, which is an integral part of MCNPX. Our results bring a contribution to those fields of physics research that utilize computer prediction of neutron generation in the energy range of tens to hundreds MeV, such as the medical radioisotope production, radiation shielding of spallation neutron sources, and nuclear transmutation in accelerator-driven systems.

Název v anglickém jazyce

Characterization of a mixed high-energy spallation neutron-proton field using monoisotopic activation detectors

Popis výsledku anglicky

We used monoisotopic Co, Au, and Bi threshold activation detectors to characterize the high-energy (> 5 MeV) portion of a mixed spallation neutron-proton (n/p) field. The field was produced by irradiating the natural uranium target-blanket subcritical assembly Quinta with 660-MeV protons from Phasotron accelerator at the Joint Institute for Nuclear Research (JINR) in Dubna. Experimental yields of the (n,x) and (p,x) reactions were compared to the calculated reaction rates, which represent the convolution of particle flux and reaction cross section. The flux was simulated using the radiation transport code MCNPX 2.7.0, and the cross sections were extracted from the following three sources: the intranuclear cascade model INCL4.2, the phenomenological spherical optical model from TALYS-1.8, and the evaluated nuclear data file TENDL-2015. We show that, in most cases, the evaluated data provide a closer agreement with the experimental data in comparison with INCL4.2 model, which is an integral part of MCNPX. Our results bring a contribution to those fields of physics research that utilize computer prediction of neutron generation in the energy range of tens to hundreds MeV, such as the medical radioisotope production, radiation shielding of spallation neutron sources, and nuclear transmutation in accelerator-driven systems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nuclear Instruments & Methods in Physics Research Section A

ISSN

0168-9002

e-ISSN

—

Svazek periodika

903

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

246-261

Kód UT WoS článku

000444422200031

EID výsledku v databázi Scopus

2-s2.0-85049759776