559 results
Showing 1–20 · 0.08 seconds · RSS
Journal of Isotopes
ISSN 1000-7512 · Editorial Board of Journal of Isotopes · 559 articles in the index
-
Journal Article
Domestic Developments in Isotope Technology (2016−2025)
The past decade (2016–2025) marks a strategic transition period for China’s isotope technology to transform from reliance on imports to independent innovation. To systematically analyze the breakthroughs and existing challenges in this field，this paper examines seven key areas over the past decade…
-
Journal Article
The Application of Block Coordinate Descent Method in Pu Isotopic Composition Analysis by Gamma Spectrum
To expand the coverage of data points used for fitting the relative efficiency curve in plutonium Isotopic Composition analysis via gamma spectrometry，and to enhance the accuracy of the relative efficiency curve fitting，the block coordinate descent method is employed to normalize the relative…
-
Journal Article
Study on an In Situ Detection Method for CO2 Concentration and Carbon Stable Isotope Values from Soil Microbial Respiration
Stable isotope technique has been used to attribute carbon dioxide (CO2) emissions to different processes，and over the past two decades their use has come to the forefront as a promising tool for CO2 source partitioning. Accurate quantification of carbon dioxide (CO2) (and other greenhouse gases)…
-
Journal Article
Nuclide Identification and Uranium Enrichment Prediction of γ-Spectrum from Lanthanum Bromide Detectors Based on Fuzzy Neural Networks
γ-ray spectral analysis serves as a core technology in nuclear radiation detection，environmental radioactivity monitoring，and nuclear security applications. However，in practical measurements，factors such as overlapping characteristic peaks，statistical fluctuations，and detector nonlinear response…
-
Journal Article
Characteristics and Controlling Factors of δ2H and δ18O in Typhoon Precipitation in the Xishuangbanna Region
Extreme rainfall events occur frequently under the background of global climate changes. As an important contributor to extreme rainfall，typhoons exert significant impacts on regional environment and social economy. Xishuangbanna，located in the southernmost tropical region of Yunnan province，serves…
-
Journal Article
Investigation on Separation of 147Pm from Nd by Cation Exchange Chromatography
Reactor irradiation of enriched 146Nd targets represents an important route for the production of 147Pm，where the major challenge lies in the efficient separation of trace 147Pm from a bulk Nd matrix. To establish a feasible separation process of 147Pm/Nd，the adsorption and separation behaviors of…
-
Journal Article
Fabrication Process of Niobium-Gallium Capsule Targets for Cyclotron Production of 68Ge
68Ge serves as the pivotal parent nuclide for the medical positron emitter 68Ga，rendering target design and fabrication critical for cyclotron-based production. This study systematically investigates the preparation of sealed Niobium-gallium capsule targets. Firstly，yield simulations using the…
-
Journal Article
Advances in the Research of Radioactive Molecular Probes Targeting GRPR
Gastrin-releasing peptide receptor (GRPR) is highly expressed in prostate cancer，breast cancer，and gastrointestinal tumors，but lowly expressed in normal tissues and organs，providing an ideal target for molecular imaging. Existing research has fully validated its biological basis and clinical…
-
Journal Article
Analytic Calculation of Magnetic Field and Fluctuation Rate in the Transition Region of Klystron
Klystron is a core vacuum electronic device for high-power microwave systems and is widely applied in fields such as particle accelerators，controlled nuclear fusion，and radar communication. Its key performance indicators including output power，gain and efficiency are mainly determined by the…
-
Journal Article
Development of a 10 MeV Ultra-Compact Cyclotron for Short-Lived Isotope Production
To address the heavy reliance on imported medical cyclotrons in China，the China Institute of Atomic Energy has independently developed a 10 MeV ultra-compact cyclotron，aiming at achieving localized and low-cost production of medical radioisotopes. The device incorporates key technologies including…
-
Journal Article
High-Efficiency and High-Sensitivity Measurement Method of 239Pu Isotopes with Miniaturized AMS
As an ultra-trace heavy nuclides，Pu have important applications in fields such as nuclear environmental protection，nuclear astrophysics，and geological research. Accelerator mass spectrometry (AMS)，with its low detection limits，high measurement sensitivity，and effective capability to overcome…
-
Journal Article
Analysis of Container Parameters in Kr-85 Activity Inversion Based on Monte Carlo Method
During the detection of releasers from nuclear fuel plants，the isotope 85Kr presents a challenge due to its exceptionally low γ branching ratio of approximately 0.434% and the complex bremsstrahlung mechanism that follows β radiation，where the branching ratio exceeds 99.5%. This complexity…
-
Journal Article
Design of a Low-Power Gamma Radiation Detection Module Based on LoRa Communication
In the event of a nuclear emergency，it is crucial to quickly assess the radiation levels within the nuclear power plant site. To address the issue of the rapid changes in the radiation field after a nuclear accident and the potential failure of the fixed monitoring network，this study has developed…
-
Journal Article
Development of an Automated Activity Measuring Device for Carbon-14 Radioactive Sources
To address the problems of low efficiency，poor consistency，and high radiation exposure risk associated with manual，sequential calibration measurements in the quality control of carbon-14 radioactive sources used in ambient particulate matter monitors，an automated activity measurement system was…
-
Journal Article
Research on DIS Dosimeter Based on TCAD Simulation Method
Personal dose monitoring and environmental radiation monitoring are commonly conducted in places such as nuclear power plant reactor operations and nuclear medical facilities，often using thermoluminescent dosimeters (TLD). However，conventional devices like TLDs suffer from limitations in terms of…
-
Journal Article
The Feasibility on the Application of THFR in Synthesis of Superheavy Nuclei
The synthesis of superheavy elements has long been one of the forefront topics in the field of nuclear physics. Utilizing actinide rare nuclides as target materials and inducing nuclear reactions with heavy-ion beams represent a key approach for synthesizing superheavy elements. However，the stable…
-
Journal Article
Current Status of High-Energy X-Ray Irradiation Processing Equipment and Its Technical Applications
Due to the tight supply of industrial cobalt sources and concerns about the safety risks of high-activity radioactive sources，the application of gamma irradiation technology is restricted，making it difficult to meet the growing demand for irradiation processing. Although the application of electron…
-
Journal Article
Optimized Design and Experimental Validation of a GEM-Based Thermal Neutron Detector
The increasing demand for high-flux neutron detection，driven by next-generation neutron sources，necessitates alternatives to conventional 3He proportional counters，which are limited by space charge effects. This paper presents the development and experimental validation of a thermal neutron…
-
Journal Article
Research on the Absolute Activity Measurement Method for 239Pu
To achieve the absolute measurement of 239Pu activity，a method combining inductively coupled plasma mass spectrometry (ICP-MS) with liquid scintillation counting (LSC) was proposed. The total α activity of the sample was measured using the triple-to-double coincidence ratio (TDCR) mode of a liquid…
-
Journal Article
Determination of 223Ra Activity by TDCR Cherenkov Counting Technique
To address the requirement for accurate activity measurement of the medical α-emitting radionuclide 223Ra in radiopharmaceutical development and clinical application，this study established a triple-to-double coincidence ratio (TDCR) Cherenkov counting method for measuring 223Ra activity. In this…