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Development of instrumentation in nuclear geophysics and their use in Morro do Ferro; Desenvolvimento de instrumentacao em geofisica nuclear e sua aplicacao no Morro do Ferro

Abstract

The development of nuclear detection and stabilization circuits was described. Furthermore, gamma and alpha spectrometry methodologies were developed for field and laboratory measurements. By the use of techniques from other geophysical instruments as fluxgate and optical pumping magnetometers, it was possible to develop stabilization and linearization circuits for gamma ray spectrometers composed by scintillation crystals and multichannel analyzers. The developed system presents excellent thermal and temporal stability, leading to a high reproducibility of the measurements. Teflon PTFE electrets based ionization chambers were constructed for monitoring the alpha particles from soil emanated radon, from the uranium and thorium radioactive series. (author).
Authors:
Publication Date:
Dec 31, 1989
Product Type:
Thesis/Dissertation
Report Number:
INIS-BR-3061
Reference Number:
SCA: 440101; PA: AIX-24:002639; SN: 93000913347
Resource Relation:
Other Information: TH: Tese (Ph.D.).; PBD: 1989
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; RADIATION DETECTORS; ALPHA PARTICLES; GAMMA SPECTROSCOPY; SPECIFICATIONS; GEOPHYSICAL SURVEYS; MAPS; MONITORING; RADON; SOILS; STABILITY; 440101; GENERAL DETECTORS OR MONITORS AND RADIOMETRIC INSTRUMENTS
OSTI ID:
10108566
Research Organizations:
Sao Paulo Univ., SP (Brazil). Inst. Astronomico e Geofisico
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
Other: ON: DE93609516; TRN: BR9230442002639
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
[192] p.
Announcement Date:
Jun 30, 2005

Citation Formats

Hiodo, F Y. Development of instrumentation in nuclear geophysics and their use in Morro do Ferro; Desenvolvimento de instrumentacao em geofisica nuclear e sua aplicacao no Morro do Ferro. Brazil: N. p., 1989. Web.
Hiodo, F Y. Development of instrumentation in nuclear geophysics and their use in Morro do Ferro; Desenvolvimento de instrumentacao em geofisica nuclear e sua aplicacao no Morro do Ferro. Brazil.
Hiodo, F Y. 1989. "Development of instrumentation in nuclear geophysics and their use in Morro do Ferro; Desenvolvimento de instrumentacao em geofisica nuclear e sua aplicacao no Morro do Ferro." Brazil.
@misc{etde_10108566,
title = {Development of instrumentation in nuclear geophysics and their use in Morro do Ferro; Desenvolvimento de instrumentacao em geofisica nuclear e sua aplicacao no Morro do Ferro}
author = {Hiodo, F Y}
abstractNote = {The development of nuclear detection and stabilization circuits was described. Furthermore, gamma and alpha spectrometry methodologies were developed for field and laboratory measurements. By the use of techniques from other geophysical instruments as fluxgate and optical pumping magnetometers, it was possible to develop stabilization and linearization circuits for gamma ray spectrometers composed by scintillation crystals and multichannel analyzers. The developed system presents excellent thermal and temporal stability, leading to a high reproducibility of the measurements. Teflon PTFE electrets based ionization chambers were constructed for monitoring the alpha particles from soil emanated radon, from the uranium and thorium radioactive series. (author).}
place = {Brazil}
year = {1989}
month = {Dec}
}