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[en] The 8th American Conference on Neutron Scattering (ACNS) was held July 10-14, 2016 in Long Beach California, marking the first time the meeting has been held on the west coast. The meeting was coordinated by the Neutron Scattering Society of America (NSSA), and attracted 285 attendees. The meeting was chaired by NSSA vice president Patrick Woodward (the Ohio State University) assisted by NSSA president Stephan Rosenkranz (Argonne National Laboratory) together with the local organizing chair, Brent Fultz (California Institute of Technology). As in past years the Materials Research Society assisted with planning, logistics and operation of the conference. The science program was divided into the following research areas: (a) Sources, Instrumentation, and Software; (b) Hard Condensed Matter; (c) Soft Matter; (d) Biology; (e) Materials Chemistry and Materials for Energy; (f) Engineering and Industrial Applications; and (g) Neutron Physics.
[en] This article is dedicated to the physics of spallation neutron production by high-energy particles and applications thereof. This field of research is related to the rapidly developing branch of nuclear physics that is high-energy neutron physics. The central part of this article is a review of experimental results obtained in different laboratories of the world during the last more than a quarter of a century. Analysis of the characteristics of multiple neutron production in targets induced by protons and nuclei with energies higher than several hundreds of mega-electronvolts per nucleon is performed. The results of measurements that were carried out at the Joint Institute for Nuclear Research with beams of protons, deuterons, and light nuclei are discussed. Natural and artificial sources of spallation neutrons and their role in up-to-date studies are considered.
[en] 26 March 2016 marked 60 years since the Joint Institute for Nuclear Research was founded in 1956 and within which the Laboratory of Neutron Physics was established. Already four years later, in 1960, the world's first pulsed fast reactor (known by its Russian acronym as IBR) operating in the periodic mode was put into operation, followed in 1984 by IBR-2. The research achievements over the last decade are summarized, the state-of-the-art laboratory hardware is discussed, and the prospects for the future are reviewed.
[en] Development of methods for instrumental neutron activation analysis (INAA) and their applications in the life sciences are reviewed. Emphasis is placed on epithermal activation with reactor neutrons (ENAA), and the advantages of this technique in analysis of environmental objects are shown. The results of applied INAA studies in the field of the life sciences carried out at the world’s leading nuclear centers are reported. Experience in employing a radioanalytical complex at the IBR-2 reactor (Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna) for such studies is summarized.
[en] Specific features of different regimes of the neutron’s wave field are theoretically considered. The results of experimental studies of the regime of a neutron’s standing waves both in the primary channel of neutron specular reflection and in different channels of registration of secondary emission are considered. Some studies of layered structures performed with the help of a neutron’s standing waves are considered. The prospects of application of a neutron’s standing waves in neutron physics and for investigation of layered nanostructures are considered.
[en] Authors discuss prospects for the development of the Kurchatov Neutron Center with the cold hydrogen source, neutron guides and new experimental facilities in the neutron guide and reactor halls on the basis of IR-8 reactor
[ru]Â ðàáîòå îáñóæäàþòñÿ ïåðñïåêòèâû ñîçäàíèÿ íà áàçå ðåàêòîðà ÈÐ-8 Êóð÷àòîâñêîãî íåéòðîííîãî öåíòðà ñ âîäîðîäíûì õîëîäíûì èñòî÷íèêîì, íåéòðîíîâîäàìè è íîâûìè ýêñïåðèìåíòàëüíûìè óñòàíîâêàìè â íåéòðîíîâîäíîì çàëå è â çàëå ðåàêòîðà
[en] Authors present the experimental verification of neutron inelastic scattering cross section on iron on the basis of neutron inelastic spectra measurements at neutron incident energies of 6.0, 7.0 and 8.0 MeV and their calculations in the framework of nuclear reactions statistical theory and direct interaction
[ru]Â ðàáîòå ïðåäñòàâëåíû ðåçóëüòàòû òåñòèðîâàíèÿ ñå÷åíèÿ íåóïðóãîãî ðàññåÿíèÿ íåéòðîíîâ íà æåëåçå, ïîëó÷åííûå ïðè èçìåðåíèÿõ ñïåêòðîâ íåóïðóãî ðàññåÿííûõ íåéòðîíîâ ïðè íà÷àëüíûõ ýíåðãèÿõ 6, 7 è 8 ÌýÂ, è ÷èñëåííîãî ìîäåëèðîâàíèÿ â ðàìêàõ ñòàòèñòè÷åñêîé òåîðèè ÿäåðíûõ ðåàêöèé è ïðÿìîãî âçàèìîäåéñòâèÿ
[en] The service life of the IBR-2 reactor, one of the leading pulse neutron sources in the world, is expected to end in 2032. Modern trends in sciences where neutrons are used, possible variants of a concept for a new neutron source and its potential position in the world neutron landscape are discussed. The flagship experiments for a new neutron source in the fields of condensed matter research, fundamental and nuclear physics are proposed.
[ru]Технический ресурс реактора ИБР-2, одного из ведущих импульсных источников нейтронов в мире, заканчивается в 2032 г. Обсуждаются варианты концепции нового источника и его место в мировом нейтронном ландшафте. Анализируются современные тенденции развития наук, где используются нейтроны. Предложены приоритетные эксперименты для нового источника в исследованиях конденсированного вещества, в фундаментальной и ядерной физике.
[en] The goals of construction of the BIGR reactor, which was commissioned in 1977 at the All-Russian Scientific Research Institute of Experimental Physics, are reviewed. The primary avenues of research at BIGR are outlined. A brief description of the neutron-physics parameters of the reactor and the characteristic shapes of generated fission pulses is given. The possible sites for installation of objects to be irradiated are specified. Devices enhancing the irradiation capacity of the reactor are characterized. Current data on various research applications of the reactor are summarized.