Application of the spectral determination method to liquid scintillation spectra

ABSTRACT

Previously we reported a simple algorithmic method of spectral determination method (SDM), which is based on the first principle that a γ-ray spectrum obtained for a sample is a linear superposition of individual spectra of the radioactive nuclides included in the sample and demonstrated that the method is valid for γ-ray determination. Here, we apply it to the spectra obtained by liquid scintillation counter (LSC). In LSC measurements quenching is generally observed, and we at first developed its correction method to standard spectra. The SDM code reported in the previous investigation is used to analyze the LSC spectra. Based on the analyses done by using the measured spectra, we concluded that the SDM method is valid in the LSC spectra similarly to the γ-ray spectra studied in the previous investigation.

KEYWORDS:

• Decomposition of a liquid-scintillation-counter spectrum
• full-spectrum analysis
• least-squares fit
• quenching correction
• determination accuracy

Acknowledgments

This work was supported by JAEA Nuclear Energy S&T and Human Resource Development Project through concentrating wisdom Grant Number JPJA20P20333366.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Japan Atomic Energy Agency [JPJA20P20333366].