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| | ARTICLE | Am. J. innov. res. appl. sci. Volume 13, Issue 5, Pages 518-529 (November, 2021) |
| Research Article 10 |
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| HOME || ABOUT US || ARCHIVES || AIMS AND SCOP || AUTHORS || REVIEW|| SUBMIT MANUSCRIPT || EDITORIAL BOARD |
| NOVEMBER | VOLUME 13 | N°5 | 2021 |
| Info-AJIRAS-® Journal ISSN 2429-5396 (Online) / Reference CIF/15/0289M |
American Journal of Innovative Research & Applied Sciences
|
American Journal of innovative
Research & Applied Sciences
Research & Applied Sciences
ISSN 2429-5396 (Online)
OCLC Number: 920041286
OCLC Number: 920041286
*Corresponding author Author & Copyright Author © 2021: | Jacques Léonce K. Yao *|. All Rights Reserved. All articles published in American Journal of Innovative Research and Applied Sciences are the property of Atlantic
Center Research Sciences, and is protected by copyright laws CC-BY. See: http://creativecommons.org/licenses/by-nc/4.0/.
ABSTRACT
Context: Telluric origin radioactivity is omnipresent in environment and contributes to the internal and external radiological exposures of the public. Objective: The objectives of present work are to measure qualitatively and quantitatively the natural radioactivity in soils of Ambilobe district. Method: In all, seventy soil samples were collected at different sites, distributed in five zones (Centre, North, South, East and West), to better understand the radioactivity levels in the study area. Three main natural radionuclides have been determined, i.e. potassium-40, uranium-238 and thorium-232 series. At the INSTN-Madagascar laboratory, the soil samples were measured by gamma spectrometry system with ORTEC NaI(Tl) detector, model 905-4 series. Results: Considering the site as a whole, the results obtained show that the potassium-40 activities vary from (403 ± 162) Bq.kg-1 to (837 ± 186) Bq.kg-1 with an average of (578 ± 162) Bq.kg-1. For the uranium-238 series, the activities vary from (14 ± 6) Bq.kg-1 to (23 ± 13) Bq.kg-1 with an average of (18 ± 4) Bq.kg-1. For the thorium-232 series, the activities vary from (28 ± 13) Bq.kg-1 to (48 ± 23) Bq.kg-1 with an average of (40 ± 8) Bq.kg-1. Conclusion: For each area studied, the levels of radioactivity of these three naturally occurring radionuclides in soils in Ambilobe district vary from point to point and are not uniformly distributed. These variations can be explained by the interaction with the geological and pedological formations of these study areas. For all of these results obtained, the specific activities of natural radionuclides present in these soils are dominated by potassium-40, followed by the thorium-232 series as well as the uranium-238 series. Thus, the soils of the Ambilobe district show a low level of radioactivity, especially for the uranium-238 and thorium-232 series.
Keywords: Natural radioactivity, soil, Ambilobe district, gamma spectrometry system, Specific activity.
Context: Telluric origin radioactivity is omnipresent in environment and contributes to the internal and external radiological exposures of the public. Objective: The objectives of present work are to measure qualitatively and quantitatively the natural radioactivity in soils of Ambilobe district. Method: In all, seventy soil samples were collected at different sites, distributed in five zones (Centre, North, South, East and West), to better understand the radioactivity levels in the study area. Three main natural radionuclides have been determined, i.e. potassium-40, uranium-238 and thorium-232 series. At the INSTN-Madagascar laboratory, the soil samples were measured by gamma spectrometry system with ORTEC NaI(Tl) detector, model 905-4 series. Results: Considering the site as a whole, the results obtained show that the potassium-40 activities vary from (403 ± 162) Bq.kg-1 to (837 ± 186) Bq.kg-1 with an average of (578 ± 162) Bq.kg-1. For the uranium-238 series, the activities vary from (14 ± 6) Bq.kg-1 to (23 ± 13) Bq.kg-1 with an average of (18 ± 4) Bq.kg-1. For the thorium-232 series, the activities vary from (28 ± 13) Bq.kg-1 to (48 ± 23) Bq.kg-1 with an average of (40 ± 8) Bq.kg-1. Conclusion: For each area studied, the levels of radioactivity of these three naturally occurring radionuclides in soils in Ambilobe district vary from point to point and are not uniformly distributed. These variations can be explained by the interaction with the geological and pedological formations of these study areas. For all of these results obtained, the specific activities of natural radionuclides present in these soils are dominated by potassium-40, followed by the thorium-232 series as well as the uranium-238 series. Thus, the soils of the Ambilobe district show a low level of radioactivity, especially for the uranium-238 and thorium-232 series.
Keywords: Natural radioactivity, soil, Ambilobe district, gamma spectrometry system, Specific activity.
Authors Contact
*Correspondant author and authors Copyright © 2021:
| Jacques Léonce K. Yao 1, 2*| Jean Pierre Boga 1| Kouakou Koffi Roger 1 | Jean Baptiste Gnélié Gnahoua 3 | and | Félicia Johnson 1, 2 |
Affiliation.
1.Université d’Antsiranana| Faculté des Sciences| Département de Physique| Laboratoire de Métrologie Nucléaire et Environnement |
BP 0 Antsiranana | Madagascar |
2.Institut National des Sciences et Techniques Nucléaires (INSTN-Madagascar) |Département Analyses et Techniques Nucléaires|
BP 3907 Antananarivo| Madagascar|
This article is made freely available as part of this journal's Open Access: ID | Stolerie–Ref3-ajira221021 |
*Correspondant author and authors Copyright © 2021:
| Jacques Léonce K. Yao 1, 2*| Jean Pierre Boga 1| Kouakou Koffi Roger 1 | Jean Baptiste Gnélié Gnahoua 3 | and | Félicia Johnson 1, 2 |
Affiliation.
1.Université d’Antsiranana| Faculté des Sciences| Département de Physique| Laboratoire de Métrologie Nucléaire et Environnement |
BP 0 Antsiranana | Madagascar |
2.Institut National des Sciences et Techniques Nucléaires (INSTN-Madagascar) |Département Analyses et Techniques Nucléaires|
BP 3907 Antananarivo| Madagascar|
This article is made freely available as part of this journal's Open Access: ID | Stolerie–Ref3-ajira221021 |
ETUDE DE LA RADIOACTIVITE NATURELLE D’ORIGINE TELLURIQUE DU DISTRICT D’AMBILOBE, MADAGASCAR
STUDY OF THE NATURAL RADIOACTIVITY OF TELLURIC ORIGIN OF THE AMBILOBE DISTRICT, MADAGASCAR
| Jean Paul Stolerie 1* | Martin Rasolonirina 2 | Zafizara Donné 1 | Briant Kall 1 | et | Naivo Rabesiranana 2|. Am. J. innov. res. appl. sci. 2021; 13(5):518-529.
| PDF FULL TEXT | | XML FILE | | Received | September 01, 2021 | | Accepted | September 11, 2021 | | Published | October 26, 2021 |
STUDY OF THE NATURAL RADIOACTIVITY OF TELLURIC ORIGIN OF THE AMBILOBE DISTRICT, MADAGASCAR
| Jean Paul Stolerie 1* | Martin Rasolonirina 2 | Zafizara Donné 1 | Briant Kall 1 | et | Naivo Rabesiranana 2|. Am. J. innov. res. appl. sci. 2021; 13(5):518-529.
| PDF FULL TEXT | | XML FILE | | Received | September 01, 2021 | | Accepted | September 11, 2021 | | Published | October 26, 2021 |