Natural radionuclides in rocks and their association with the mineralogy of rocks in Dakshina Kannada region of southern India

• Autorzy: Lokesh Narsha , Vinutha Pudiyaneravana Ramanand , Malleshi Kavasara , Narayana Yerol

Identyfikatory

DOI

10.1007/s11600-022-00866-9

• Języki publikacji: EN

Abstrakty

EN

The radioactivity levels of natural radionuclides ²²⁶Ra, ²³²Th, and ⁴⁰K in the rocks of Dakshina Kannada region of southern India were measured by NaI (Tl) gamma-ray spectrometer. The specific activities of ²²⁶Ra, ²³²Th, and ⁴⁰K ranged from 4.2±0.4 to 74.5±1.7 Bq kg⁻¹, 14.5±0.7 to 83.5±1.6 Bq kg⁻¹, and 172±3 to 964±7 Bq kg⁻¹ with the mean of 25.1±1.0 Bq kg⁻¹, 36.1±1.0 Bq kg⁻¹, and 502±5.0 Bq kg⁻¹, respectively. The normality of the frequency distribution curves of ²²⁶Ra, 232Th, and ⁴⁰K was tested using the Kolmogorov–Smirnov test. The radiological hazard indices were computed from the measured activity concentration of natural radionuclides in rocks and these were found to be within acceptable levels. To investigate the sources of radioactivity, the minerals involved in the rocks were detected using XRD and FTIR. The mineralogical studies reveal that the principal sources of gamma radiation in the study area are ²³²Th-rich phosphates and 40K-bearing feldspars.

Słowa kluczowe

EN

natural radionuclides; spectroscopy; rock; gamma dose; hazard indices; minerals

PL

naturalne radionuklidy; spektroskopia; skała; moc dawki promieniowania gamma; wskaźnik zagrożenia; minerały

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2022
• Tom: Vol. 70, no 5
• Strony: 2149--2160
• Opis fizyczny: Bibliogr. 48 poz.

Twórcy

autor

Lokesh Narsha

• Department of Physics, Mangalore University, Mangalagangothri 574 199, India

autor

Vinutha Pudiyaneravana Ramanand

• Department of Physics, Beary’s Institute of Technology Mangalore, Mangalore 574 153, India

autor

Malleshi Kavasara

• Department of Physics, Mangalore University, Mangalagangothri 574 199, India

autor

Narayana Yerol

• Department of Physics, Mangalore University, Mangalagangothri 574 199, India

• https://orcid.org/0000-0001-8079-9681

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Uwagi

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Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).