Parameters of the NERA spectrometer for cold and thermal moderators of the IBR-2 pulsed reactor

2nd Dynamics of Molecules and Materials

物理学;材料科学

Natkaniec, I.^1,2 ; Chudoba, D.^1,2 ; Hetmaczyk, L.^1,3 ; Kazimirov, V.Yu.^1 ; Krawczyk, J.^1,4 ; Sashin, I.L.^1 ; Zalewski, S.^1,5

Joint Institute for Nuclear Research, Frank Laboratory of Neutron Physics, Joliot-Curie 6, Dubna

141980, Russia^1

Adam Mickiewicz University, Faculty of Physics, Umultowska 85, Pozna

61-614, Poland^2

Jagiellonian University, Faculty of Chemistry, Ingardena 3, Krakow

30-060, Poland^3

H. Niewodniczaski Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, Kraków

31-342, Poland^4

Siedlce University of Natural Sciences and Humanities, Institute of Chemistry, 3 Maja 54, Siedlce

08-110, Poland^5

关键词: Cold neutron sources;    Horizontal channels;    NERA spectrometer;    Pulsed reactor;    Thermal neutron spectrum;    Time-of-flight spectrometer;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/554/1/012002/pdf
DOI  :  10.1088/1742-6596/554/1/012002

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The inverted geometry time-of-flight spectrometer NERA designed for simultaneous investigation of elastic and inelastic neutron scattering was constructed on a 100 meter long flight path of the IBR-2 reactor at JINR, Dubna, Russia. Spectrometer parameters were optimized for the thermal neutron spectrum of a water moderator at 330 K. Recently, a new type of cold neutron source operating at 30 K was installed in the sector of six horizontal channels. The cold source in combination with the water moderator allows one to effectively use incident neutrons in wide range of wavelengths.