Beta spectrum measurements using a quasi-4π detection system based on Si detectors

Area of Science:

• Nuclear Physics and Spectroscopy
• Radiation Detection and Measurement
• Applied Physics

Background:

• Accurate beta spectrum measurement is crucial for nuclear energy, medicine, metrology, and physics.
• Existing methods may face challenges with precision and self-absorption effects.
• Development of advanced spectroscopic tools is essential for these fields.

Purpose of the Study:

• To develop and validate a novel beta spectrometer with a near 4π configuration.
• To investigate and mitigate the impact of self-absorption on spectral measurements.
• To optimize source preparation techniques for enhanced measurement accuracy.

Main Methods:

• Development of a near 4π beta spectrometer utilizing silicon detectors.
• Application of Monte Carlo simulations to study self-absorption effects.
• Optimization of radioactive source preparation methods.
• Experimental measurement and comparison of beta spectra from ¹³³Ba and ³⁶Cl.

Main Results:

• A functional near 4π beta spectrometer was successfully developed.
• Monte Carlo simulations provided insights into self-absorption, guiding source preparation.
• Optimized techniques led to improved accuracy in measured beta spectra.
• Experimental results for ¹³³Ba and ³⁶Cl spectra align with PENELOPE simulations.

Conclusions:

• The developed silicon detector spectrometer offers a reliable tool for precise beta spectrum analysis.
• The combined approach of simulation and optimized source preparation effectively addresses self-absorption.
• This work contributes to advancing measurement capabilities in nuclear science and related fields.