Program - Brookhaven National Laboratory

detectors at the newly constructed flight path for reducing low-energy down scattering neutron background
will be presented. This work benefits from the LANSCE accelerator facility and is supported by the U.S.
Department of Energy under contracts DE-AC52-06NA25396 (LANL) and DE-AC52-07NA27344 (LLNL).
LA-UR number: ’LA-UR-12-23508’
[1] A. Lajtai, J. Kecskemeti, J. Safar, P. Dyachenko, and V. M. Piksaikin, Proc. Int. Conf. Nuclear Data
for Basic and Applied Science, Santa Fe, New Mexico, May 13-17, 1985, p. 613, P. G. Young, R. E. Brown,
G. F. Auchampaugh, P. W. Lisowski, and L. Stewart, Eds., Gordon and Breach Science Publishers (1985).
[2] H. Werle and H. Bluhm, Jour. Nucl. Ener. 26, 165 (1972). [3] A.A. Bojtsov, A.F. Semenov, and
B.I. Starostov, pp. 294 in Proc. All Union Conf. on Neutron Physics, 2-6 October 1983, Kiev, Moscow
(1984).
DA 8 5:45 PM
Fast Neutron Laboratory of the NPI ˇReˇz: Neutron Measurement Techniques
J. Novák, M. Majerle, P. Bém, M. Honusek, E. Simečková, M. Stefánik
Nuclear Physics Institute of The Academy of Sciences of the Czech Republic, 250 68 ˇ Reˇz 130, Czech
Republic
Nuclear reaction department of the NPI ˇ Reˇz operates three different fast neutron sources: p+D2O and
p+Be with continuous neutron spectrum with energies up to 37 MeV, and p+Li quasi-monoenergetic
neutrons with energies up to 37 MeV. Isochronous cyclotron U-120M provides protons in the energy range
20-38 MeV and currents up to 20 µA. Several neutron detection techniques were developed next to the
neutron sources. Primarily the spectra were deconvoluted from the reaction rates of irradiated activation
foils. Later a proton recoil telescope was constructed and the spectra from p+Li target were successfully
validated against MCNPX simulations (agreement within 10%) [1]. Recently, we started to use NE213
scintillation detector together with 500 MHz digitizer card and have succeded to obtain neutron spectra
from the scintillator response and also to record a limited Time-Of-Flight spectra from our neutron sources
on cylotron without axial injection and with complicated micro- and macro-structure of the beam. Obtained
neutron spectra from all methods are compared and show good agreement.
[1] S.P. Simakov et al., Analysis of the Dosimetry Cross Sections Measurements up to 35 MeV with a
7 Li(p,xn) Quasi-monoenergetic Neutron Source, ND-1450, DOI: 10.3938/jkps.59.1856
Session DB Neutron Cross Section Measurements
Monday March 4, 2013
Room: Met West at 3:30 PM
DB 1 3:30 PM
238 U Neutron Capture Cross Section Measurements in the Unresolved Energy Region at
the GELINA Facility
C. Lampoudis, F. Gunsing
CEA-Saclay, Irfu/SPhN, Orme-des-Merisiers, 91191 Gif-sur-Yvette, France
S. Kopecky, B. Becker, P. Schillebeeckx, R. Wynants
EC-JRC-IRMM, Retieseweg 111, 2440 Geel, Belgium
The issue of nuclear data uncertainties impact on the design and fuel cycle performances on innovative
nuclear systems (generation IV, Accelerator Driven Systems), created the need to improve specific nuclear
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