Neutron instrument

This study aimed to investigate the levels of contamination of potentially toxic trace elements in the soil of Dong Nai Province, Vietnam. To achieve this, the Instrument Neutron Activation Analysis (INAA) method was employed to measure the concentrations of five potentially toxic trace elements, including manganese (Mn), arsenic (As), chromium (Cr), antimony (Sb), and zinc (Zn), across 30 soil samples collected from the region.

11p visergeyne 18-06-2024 1 0   Download

Ebook "Quasielastic neutron scattering: Principles and applications in solid state chemistry, biology, and materials science" is to provide a state of the art exposition of quasielastic neutron scattering both for specialists in this subject and for those who work in related fields such as NMR, infrared and Raman spectroscopy. Quasielastic Neutron Scattering starts with a thorough grounding in basic theory and then describes the instruments and methods used in cold neutron scattering such as neutron spin-echo spectrometers.

444p loivantrinh 29-10-2023 3 2   Download

In the present, there is no study about the validation of this feature. The aim of this study is to validate the McStas-MCNPX interface by comparison between the calculated results of the McStasMCNPX interface with the other codes (VITESS, PHITS) and experiments.

7p visnape 30-01-2023 7 4   Download

This review was aimed to find out real life application of noble gas xenon. The noble gas xenon (Xe) occupy the zero group of the periodic table. It is fifth member of noble gas family. It is a colorless, dense, odorless noble gas found in the Earth's atmosphere in trace amounts. Xenon has so many application in real life, viz., in arc lamps in xenon HID (high-intensity discharge) lamp and in high pressure arc lamps to produce ultraviolet light. It is used in instruments for radiation detection, e.g., neutron and X-ray counters and bubble chambers.

6p caygaocaolon8 07-11-2020 16 1   Download

BornAgain is a free and open-source multi-platform software framework for simulating and fitting X-ray and neutron reflectometry, off-specular scattering, and grazing-incidence small-angle scattering (GISAS). This paper concentrates on GISAS. Support for reflectometry and off-specular scattering has been added more recently, is still under intense development and will be described in a later publication. BornAgain supports neutron polarization and magnetic scattering. Users can define sample and instrument models through Python scripting.

15p kequaidan6 10-07-2020 19 4   Download

Evaluating the neutronic state (neutron flux, power . . . ) of the whole nuclear core is a very important topic that has strong implication for nuclear core management and for security monitoring. The core state is evaluated using measurements and calculations.

9p christabelhuynh 31-05-2020 17 1   Download

The paper describes the main challenges justifying research in these different areas, and summarizes the recent progress reported. It offers researchers and engineers a way to quickly and efficiently access knowledge in highly specialized areas.

49p christabelhuynh 30-05-2020 17 2   Download

Neutron scattering applications often require discriminating the elastic contribution from the inelastic contribution. For this purpose, correlation spectroscopy offers an effective tool with both pulsed and continuous neutron sources as well as several advantages: the analysis of the neutron velocity distribution can be carried out with a duty factor of 50%, independently on the resolution value; the best statistical accuracy for spectra where the elastic part encompasses most of the integrated intensity is provided.

8p caygaocaolon1 13-11-2019 21 1   Download

The spectrum weighted responses of various detectors were calculated to provide guidance on the proper selection and use of survey instruments on the basis of their energy response characteristics on the neutron fields. To yield the spectrum weighted response, the detector response functions of 17 neutron-measuring devices were numerically folded with each of the produced calibration neutron spectra through the in-house developed software ‘K-SWR’.

8p minhxaminhyeu5 30-06-2019 29 1   Download

The samples are important in various fields including nuclear technology. Methods: Samples were neutron irradiated using nuclear reactors, and the radioactive assay was carried out using high-resolution gamma-ray spectrometry. Major to trace mass fractions were determined using both relative and internal monostandard (IM) NAA methods as well as OES methods

7p minhxaminhyeu4 26-06-2019 14 0   Download

This paper presents a study on thermal neutron reflection properties of neutron guide for cylinder, spindle, elliptic and parabolic geometries using 241Am-Be neutron source (5.2 Ci) and BF3 detector, whereas neutron guide is important instrument for transportation of neutrons. To this goal, the required inner and outer radii of neutron guide have been calculated to achieve the highest guided thermal neutron flux based on MCNPX Monte Carlo code.

6p minhxaminhyeu3 12-06-2019 9 0   Download

This work provides a comprehensive overview of the calibration of DWRNPM channels by describing the configuration of the DWRNPM system and by summarizing the theories of operation and the reference power estimation methods with their associated calibration procedure. The calibration procedure was actually performed during the commissioning of an open-pool type research reactor, and the results and experience are documented herein.

8p minhxaminhyeu3 25-06-2019 7 0   Download

This report presented the method for thermal neutron dosimetry on base of determination of specific radioactive activity of measured 24 Na in the irradiated Human blood. Stable sodium contents of 23 Na in blood samples (for 150 people in Lamdong province, in which there are 85 staffs working at the Nuclear Research Institute) determinated by the method of instrumental neutron activation analysis at the Reactor and have the average value of 1.90±0.27 mg/ml blood.

3p uocvong04 24-09-2015 41 2   Download

Khoảng 1700 đồng vị khác nhau được biết đến, trong đó khoảng 275 là ổn định. Phần còn lại có tính phóng xạ, đó là, cấu hình hạt nhân của họ không ổn định và có thể thay đổi các hình thức ổn định hơn bằng cách biến đổi hạt nhân chung được gọi là phân rã phóng xạ. Những quá trình phân rã phóng xạ đi kèm với sự phát xạ của các hạt và / hoặc các photon từ hạt nhân. Đồng vị (hoặc nuclides) được phân biệt bởi số lượng proton và neutron (gọi chung là nucleon)...

36p bengoan369 15-12-2011 68 8   Download