Elemental Analysis by Neutron Induced Nuclear Reaction - Prompt Gamma Neutron Activation Analysis for Chemical Measurement -

중성자 핵반응을 이용한 원소 검출기술 - 즉발감마선 중성자 방사화분석법을 이용한 검출기술 -

  • Song, Byung Chul (Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute) ;
  • Park, Yong Joon (Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute) ;
  • Jee, Kwang Yong (Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute)
  • 송병철 (한국원자력연구소, 원자력화학연구부) ;
  • 박용준 (한국원자력연구소, 원자력화학연구부) ;
  • 지광용 (한국원자력연구소, 원자력화학연구부)
  • Received : 2003.06.18
  • Accepted : 2003.08.14
  • Published : 2003.10.25

Abstract

Neutron induced prompt gamma activation analysis (PGAA) offers a nondestructive, sensitive and relatively rapid method for the determination of trace and major elements and is proven to be convenient for online analysis of minerals, metals, coal, cement, petrochemical, coating, paper as well as many other materials and products. The technique has found many uses in medicine, industry, research, security and the detection of contraband items. This report reviews the present status and future trends of the PGAA techniques. Requirements for the system are neutron source, high resolution HPGe detectors with a high-voltage power supply, an amplifier, analog-to-digital converter, and a multichannel analyzer for the detection and measurement of prompt ${\gamma}$-ray emit form the neutron capture elements. Introducing a ${\gamma}$-${\gamma}$ coincidence system also improves the quality of the ${\gamma}$-ray spectrum by suppressing the background created from the Compton scattering of high energy prompt ${\gamma}$-rays. A PGAA system using a $^{252}Cf$ neutron source is currently under construction for the on-line measurement of several elements in aqueous samples at KAERI. The system can be applied for the detection of chemical weapons and explosives as well as various narcotics.

Keywords

prompt gamma;thermal neutron;${\gamma}$-${\gamma}$ coincidence;elemental analysis