Conveners
Parallel Session 1: Fundamental interactions & symmetries in neutron induced reactions/Properties of compound states, nuclear structure/Intermediate and fast neutron induced reactions/Nuclear fission: (1)
- Maxim Karetnikov (FSUE All-Russian Scientific Research Institute of Automation)
Parallel Session 1: Fundamental interactions & symmetries in neutron induced reactions/Properties of compound states, nuclear structure/Intermediate and fast neutron induced reactions/Nuclear fission: (2)
- Baohua Sun (Beihang University)
Parallel Session 1: Fundamental interactions & symmetries in neutron induced reactions/Properties of compound states, nuclear structure/Intermediate and fast neutron induced reactions/Nuclear fission: (3)
- Jie Ren (China Institute of Atomic Energy)
Parallel Session 1: Fundamental interactions & symmetries in neutron induced reactions/Properties of compound states, nuclear structure/Intermediate and fast neutron induced reactions/Nuclear fission: (4)
- Yonghao Chen (高能所)
How long neutrons survive plays a key role in particle physics and cosmology. However, conflicting results with a deviation of about 9 second have been found over years in neutron lifetime measurements. Different ideas have been proposed to solve such deviations. We proposed a new scheme based on CubeSat to determine neutron lifetime. In this talk, after a short overview on the lifetime...
Tritium is important in fusion facility and one of the main ways to realize tritium production is the triton-producing reaction of lithium nucleus induced by neutrons. Generally the cross section of neutron induced triton-producing reaction of 6Li has a large value in a wide range of neutron energy, while in the energy range of fast neutron the triton production is dominant by the reaction of...
The Back-n facility at the China Spallation Neutron Source (CSNS) is a newly-built neutron time-of-flight facility providing white neutrons. It is characterized by the high neutron flux, wide energy range, and good energy resolution. As one of the essential parameters, the Energy resolution function (ERF) has a significant impact on nuclear data measurements and related neutron techniques,...
A possibility of the test of T - invariance violation in neutron - nuclear interaction in the multiple mirror reflections of slow neutrons is considered. The reflections are assumed in a "whispering gallery" mode. It is shown that an expected effect may exceeds in magnitude a correspondent effect near p - wave resonance. The methodical features of such experiment are considered.
The n+d reaction is one of the most fundamental three-body nuclear reactions, which is an important platform for examining the nucleon-nucleon interaction. The wave-packet continuum discretization approach is developed to solving three-nucleon scattering equations within a modified Faddeev-AGS equation framework, which is based on the discretization representation of the three-body continuum...
The final accuracy of the evaluations relies on the quality of the experimental datasets
being used. But, conversely, the quality of the experimental datasets relies on the quality of the
standards used as reference. Big improvements have been done in the last decade, after the
IAEA launched an international project for the “Maintenance of the Neutron Cross-Sections
Standards”, adopting...
A nanosecond tagged neutron technology (NTNT) is based on the space-time analysis of events produced by the 14 MeV neutrons which time of escape, energy, and direction of movement is known by the recording of the accompanying alpha-particle. The development by FSUE VNIIA of the high-intensity generator of tagged neutrons promoted the extension of the applications of tagged neutrons. Currently,...
The Back-streaming neutron beamline (Back-n) at the China Spallation Neutron Source (CSNS) is a newly built time-of-flight facility that provides white neutrons. The neutron flux of Back-n is of crucial importance for the feasibility studies and data analysis of experiments conducted utilizing this resource. In particular, the accurate flux is a prerequisite for conducting high-precision...
$^{\text{175, 176}}\text{Lu}$ (n,γ) $^{\text{176, 177}}\text{Lu}$ reactions were studied via radiative capture of resonance neutrons at the CSNS Back-n White Neutron Source. Using the time-of-flight (ToF) technique, gamma-ray spectra for isolated resonances were measured. The experiment was conducted with a coaxial HPGe gamma detector equipped with an anti-Compton system, positioned 20 cm from...
The study of inelastic scattering of fast neutrons by atomic nuclei is of great importance for both fundamental and applied neutron-nuclear physics. Reactions induced by neutrons provide a unique source of information for describing the processes of strong interaction between nucleons.
Inelastic scattering processes are utilized to study the characteristics of excited states of target nuclei...
China Spallation Neutron Source (CSNS) is a newly built large scale facility in 2018. It is generating neutrons by bombarding 1.6 GeV protons into a tungsten target for multidisciplinary research. A back-streaming neutron beamline (Back-n) at CSNS is built at the reverse direction regarding to the proton beam mainly for the nuclear data measurement. Back-n is characterized by its wide energy...
A previous experiment performed at JRC-Geel on prompt fission neutrons (PFN) in correlation with fragments from spontaneous fission of 252Cf was repeated using an improved setup and much better statistics. The experiment lasted 3 months and 68×106 coincident events were collected. In this new experiment PFN spectra and angular distributions (in the laboratory system) are selected in a narrow...
The study of the dynamics of heavy nuclei fission remains a relevant problem in modern nuclear physics. One of the key questions in this field is the identification of the mechanism of spin formation of the fission fragments, which is still insufficiently studied. In this work, based on studies [1,2], a modelling of the potential energy of the compound fissile system has been performed to...
The present work provides a detailed examination of a series of studies [1,2] dedicated to investigating the effect of rotation of the fissile nucleus of the isotope $^{\text 236}$U in the $^{\text 235}$U(n,f) process induced by monochromatic polarized neutrons with energies of 62 meV and 270 meV. The main focus is on the analysis of the anisotropic angular distribution of γ-rays emitted by...
The report briefly outlines the significance and background of this experimental study, the experimental setup, and the preliminary results. The 14N(n,p)14C reaction is the most significant poisoning reaction in the s-process nucleosynthesis. The measurement of its differential cross-section is crucial for producing 19F, determining neutron dose in boron neutron capture therapy (BNCT),...
Understanding (n-γ) and (n-n'γ) correlations is crucial for analyzing inelastic neutron scattering processes and assessing the impact of direct and compound nucleus mechanisms on nuclear reactions. However, there are few experiments measuring (n-n'γ) correlations with 14 MeV neutrons, and most of these studies, conducted over 40 years ago, suffer from poor accuracy and limited angular range...
The neutron total cross sections ( σtot ) are of great value in nuclear reactor design, nuclear theory models, nuclear applications and other fields. Thulium ( 169Tm ) is a crucial neutron absorbing material, and the σtot of 169Tm are highly useful for nuclear reactor design. However, there are only a few experimental σtot of 169Tm in EXFOR and no data in the energy between 10 keV and hundreds...
Cross sections for the 148Sm(n,α)145Nd reaction were measured at neutron energies of 4.8, 5.1, and 6.3 MeV, performed at the EG-5 Van de Graaff accelerator at the Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research. A double-section gridded ionization chamber was employed to detect the emitted alpha particles. Samples of 148Sm2O3 were positioned back-to-back on the...
The thermal capture cross section and resonance intergal for the 94Zr(n,γ) reaction were measured relatively to that of 197Au(n,γ)198Au by activation method using IREN facility of the Joint Institute for Nuclear Research (JINR) [1]. Neutrons are produced via the interaction of electron beam with a tungsten target. The induced activities in activated samples were measured by a high-resolution...
In the burgeoning age of artificial intelligence (AI) and advanced technologies, neural networks have emerged as powerful tools, revolutionizing various scientific domains. This lecture, "Recent Progress of Neural Networks in Nuclear Structures," explores the intricate workings of these algorithms and their transformative impact on nuclear physics.
We begin by examining the fundamental...
