Evaluation of fission product yield distributions in the U(n, f) reaction.

In this work, the phenomenological potential-driving model based on the random neck rupture model is used to calculate and evaluate the independent yields and cumulative yields of fission products for the mass/charge distribution in the U(n, f) reaction with an incident neutron energy of 0.5 MeV and 14 MeV. In particular, the energy dependence of independent yields, including Kr, Sr, Zr, Mo, Ru, Xe, Cs, Ba and Ce, is evaluated for an incident neutron energy below 20 MeV and compared with GEFY6.

Molecular mechanisms of neutron radiation dose effects on M generation peas.

The dose effect of radiation has long been a topic of concern, but the molecular mechanism behind it is still unclear. In this study, dried pea seeds were irradiated with Cf fission neutron source. Through analyzing the transcriptome and proteome of M generation pea (Pisum sativum L.

Production of medical isotope Ge based on a novel chromatography separation technique and assembling of Ge/Ga generator.

A double-column chromatography separation technique was involved for isolation of Ge from a bombarded Ga-Ni alloy target. About 185 MBq Ge obtained was used for assembling SnO-based Ge/Ga generator. Approximately 70% of Ga in high radioactivity concentration was eluted from generator with excellent radionuclidic, radiochemical and chemical purity.

In situ experimental measurement of mercury by combining PGNAA and characteristic X-ray fluorescence.

In our previous research, a new detection method was proposed to measure Hg and Pb simultaneously by combining Prompt Gamma-ray Neutron Activation Analysis (PGNAA) and X-ray Fluorescence (XRF) and proved by the Monte Carlo N-Particle (MCNP) simulation code. For further experimental verification, a combined measurement experimental facility, comprising an Am-Be neutron source, SAINT-GOBAIN Bismuth Germanate (BGO) as the γ-ray detector, and an NaI detector with 25 μm Be window as the X-ray detector, was presented. Specifically, the characteristic X-ray fluorescence of the Hg directly induced in this experimental facility was utilized to improve the limits of detection (LOD) of Hg instead of traditional excitation sources.

Study on the Relationship between Seed Absorbed Dose and Seed Composition of Cf Neutron Source Irradiated Bean Seed.

This study aims to further identify the biological effects of neutron-irradiated plants and provides insights into the mutation breeding of such plants. In this study, the neutron irradiation device designed by our institute was used to analyze the relationship between the seed components in different legume crops and their neutron absorption dose rate, fission gamma absorption dose rate, and induced gamma absorption dose rate. The results show that the effect sizes of the components on the neutron absorbed dose rate are as follows: ash > fat > moisture > carbohydrate > protein.

250 kV 6 mA compact Cockcroft-Walton high-voltage power supply.

A compact power supply system for a compact neutron generator has been developed. A 4-stage symmetrical Cockcroft-Walton circuit is adopted to produce 250 kV direct current high-voltage. A 2-stage 280 kV isolation transformer system is used to drive the ion source power supply.

A high-current microwave ion source with permanent magnet and its beam emittance measurement.

The progress of a 2.45 GHz high-current microwave ion source with permanent magnet for T(d,n)4He reaction neutron generator is reported in this paper. At 600 W microwave power and 22 kV extraction voltage, 90 mA peak hydrogen ion beam is extracted from a single aperture of 6 mm diameter.