CTOF measurements and Monte Carlo analyses of neutron spectra for the backward direction from a lead target irradiated with 200-1000 MeV protons

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:268

Article

Azhgirey, I. L.¹  Belyakov-Bodin, V. I.¹  Degtyarev, I. I.¹  Sherstnev, V. A.²  Mashnik, S. G.³  Gallmeier, F. X.⁴  Lu, W.⁴ 

[1] Inst High Energy Phys, Protvino, Russia

[2] Inst Theoret & Expt Phys, Moscow 117259, Russia

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[4] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA

关键词: Measurement;    Neutron spectrum;    Comparison;    Prediction by the MARS;    The RTS&T;    The MCNPX;    The MCNP6 code systems;   

DOI  :  10.1016/j.nimb.2010.09.005

来源: Elsevier

【 摘 要 】

A calorimetric time-of-flight technique was used for real-time high-precision measurement of neutron spectra at an angle of 175 degrees from the initial proton beam direction which hits a face plane of a cylindrical lead target of 20 cm in diameter and 25 cm thick A comparison was performed between the neutron spectra predicted by the MARS RTS&T MCNP6 and the MCNPX 2 6 0 transport codes and that measured for 200 400 600 800 and 1000 MeV protons Neutron spectra were measured within the energy range from 0 7 to 250 MeV almost continuously The transport codes tested here describe with different success the measured spectra depending on the energy of the detected neutrons and on the incident proton energy but all the models agree reasonably well with our data (C) 2010 Elsevier B V All rights reserved

【 授权许可】

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