Conveners
Plenary Session
- Yuri Kopatch (Joint Institute for Nuclear Research)
Plenary Session
- Tianjiao Liang ()
Plenary Session
- Hirohiko M. Shimizu ()
Plenary Session
- Zhigang Ge ()
Plenary Session
- Ruirui Fan (高能所)
Plenary Session
- Inga Zinicovscaia (Joint Institute for Nuclear Physics & Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, )
The Frank Laboratory of Neutron Physics (FLNP) of the Joint Institute for Nuclear Research (JINR) is one of the leading centers for neutron physics in the JINR Member States. FLNP scientists conduct research in the fields of condensed matter physics and nuclear reactions with neutrons, as well as to solve a wide range of applied problems using nuclear physics techniques. The basic facility of...
The parity violating effects in nuclear interactions is extremely enhanced in resonant neutron absorption processes via compound nuclear states for some of medium-heavy nuclei. The enhancement is explained as a result of the interference between parity-unfavored partial amplitudes of the compound nuclear process, which is referred to as "s-p mixing". The "s-p mixing" is expected to enhance the...
Abstract: Nuclear data of the (n, cp) reactions are important in the development of nuclear energy, the application of nuclear technology and the research of nuclear reaction theory. Based on the neutron sources of the 4.5 MV Van de Graaff accelerator of Peking University, EG-5 Van de Graaff accelerator of JINR, FLNP, HI-13 tandem accelerator of CIAE, and the CSNS Back-n, we have extended our...
The tagged neutron method (TNM) is currently being implemented at the Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, for neutron-nuclear physics research. This method utilizes the reaction d+t→α+n to produce neutrons with an energy of approximately 14 MeV, which are emitted simultaneously with α-particles in nearly opposite directions. Neutron tagging is achieved...
The Acceleration Effect (AE), the existence of which was recently predicted in [1], is a generalization of the previously discovered of optical Accelerating Matter Effect (AME) [2]. It consists in the fact that the result of the interaction of a wave with an accelerating object is a change in its frequency. The effect is proportional to the acceleration of the object and the time delay caused...
New short-range forces (SRF) are predicted in many theories beyond the Standard Model of particle physics in the form of weakly interacting scalar or pseudo-scalar bosons. For example, dark matter could be explained by the existence of a weakly interacting boson, and some theories with extra spatial dimensions predict such a particle. Neutrons are useful tools in searches for these SRFs due to...
One of the current problems of the Standard Model of Elementary Particle Physics is the about three sigma failure of the first-row unitarity test of the Cabbibo-Kobayashi-Maskawa matrix. A long-standing goal of the study of free neutron beta decay is a better determination of its upper left element ("Vud"). That is possible with measurements of the neutron lifetime and a correlation...
Neutron activation analysis due to its high accuracy, reproducibility and nondestructive nature is a technique widely used in the environmental, material, archeological, geological and nanotoxicological studies. Favorable features of neutron activation analysis will be highlighted in the presentation and the principal of its realization on the installation REGATA of the IBR-2 reactor will be...
Neutronic Characteristics of Metal Hydride Moderators and Their Applications in Microreactors
Energetic dependence of neutron-induced single event upsets, and its impact on atmospheric neutron SER prediction
Accelerator Driven Subcritical system is believed to be the best candidate for nuclear waste transmutation. In the design scheme of ADS plant with one target, high-intensity external neutrons are concentrated in the center of the core which will result in a high power peak factor. To solve the challenges, a Multi-Beam Accelerator Driven Subcritical（MB-ADS） system is proposed. The spallation...
Neutron sources have been widely applied in numerous fields, ranging from detection technology to medicine and laboratory astrophysics due to their unique features of electrical neutrality and deep penetration capability. Currently, there are two main mechanisms for the generation of neutrons assisted by lasers, i.e., photonuclear reactions (γ, n) and beam-target nuclear reactions. Compared...
The report presents a project of a high brilliance ultracold neutron (UCN) source, which is planned to be constructed at FLNP JINR. It details the concept of the proposed source, the progress made in designing its key components, and the challenges that need to be overcome. A potential research program on this source is also discussed.
As part of this project, it is initially planned to...
As one of the important auxiliary devices for neutron scattering instruments, sample environment provides various experimental conditions to enhance the research capabilities of the instruments. The sample environment at the Chinese Spallation Neutron Source (CSNS) has been providing in-situ experimental services since the commissioning of the instrument in 2018. It has evolved from initially...
Polarized neutrons serve as a critical probe in nuclear physics to investigate spin-dependent interactions and nuclear dynamics. Polarized neutron enables precise studies of nuclear forces, include probing nuclear structure, analyzing reaction mechanisms and resolving nucleon internal spin-quark distributions via deep inelastic scattering. Challenges persist in achieving high polarization...
The Back-n white neutron facility is a comprehensive experimental platform that serves a wide spectrum of research goals, including nuclear data measurement, experiments in nuclear physics and astrophysics, calibration of neutron detectors, investigation of neutron radiation effects, and applications in archaeology, among others. Operational since 2018, this beamline has facilitated over 300...
At the 11-m flight path of the IREN facility the measurements of the differential cross sections of the Br (n, γ) and Cl (n, γ) reactions were carried out in region of the low-lying p-wave resonances of bromine at the 0.88 eV incident-neutron energy and chlorine at 398 eV, correspondingly. The purpose of the experimental γ-quanta angular distributions obtaining is search of the asymmetry of...
