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Full spectrum analysis with the non-negative least square constraint for laboratory HPGe gamma spectrometry

  • Mai Thanh Man
  • Vu Ngoc Ba
  • Dang Thi Thao My
  • Dang Nguyen Phuong
  • Truong Thi Hong LoanEmail author
  • Ngo Quang Huy
Article
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Abstract

In this work, the full spectrum analysis (FSA) method with the non-negative least square (NNLS) constraint and the Kalman filter were developed for the laboratory HPGe gamma spectrometry. The sensitive spectra of 238U, 232Th and 40K for the HPGe gamma spectrometry were derived from measured gamma spectra of calibration soil samples by using this algorithm. The calculated sensitive spectra have all characteristic gamma lines and a good fit in relative comparison with the respective reference spectra of 238U, 232Th and 40K acquired from measuring the RGU1, RGTh1, RGK1 standard samples. These sensitive spectra were then applied in analyzing the activity concentrations of the 238U, 232Th, 40K radionuclides in soil samples collected at the surveyed area. The results of the activity concentrations were in accordance with the ones determined by the window analysis (WA) method with the most deviations of less than 14%. It proved that our analyzing program using the FSA method with the NNLS constraint gives the reasonable solution of the sensitive spectra matrix, even for HPGe detector which has a high energy resolution and 16 K multi-channel analyzer.

Keywords

Full spectrum analysis Non negative least square Window analysis Sensitive spectrum HPGe detector Gamma spectrometry 

Notes

Acknowledgements

This research is funded by National Foundation for Science and Technology Development (Nafosted), Vietnam under Grant Number 103.04-2018.61. This research is done at the Nuclear Technique Laboratory (NTLab), VNUHCM - University of Science which was invested by Vietnam National University Ho Chi Minh City, Vietnam.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.Nuclear Technique LaboratoryVNUHCM - University of ScienceHo Chi Minh CityVietnam
  2. 2.Nulear Physics Department, Faculty of Physics and Engineering PhysicsVNUHCM - University of ScienceHo Chi Minh CityVietnam
  3. 3.Institute of PhysicsUniversity of FreiburgFreiburg im BreisgauFederal Republic of Germany
  4. 4.Center for Nuclear TechniquesHo Chi Minh CityVietnam
  5. 5.Faculty of MedicineNguyen Tat Thanh UniversityHo Chi Minh CityVietnam

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