Measurement of natural radioactivity of Iranian granite samples using beta–gamma coincidence spectrometer and maximum likelihood method

Ashrafi, Saleh; Jahanbakhsh, Okhtay

doi:10.1007/s12665-019-8434-6

Cited by 6 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…None of those indexes exceeded the reference limits. The results were found in agreement with previous studies [14,16,24]. Fig.…”

Section: Measurements Results and Risk Indexessupporting

confidence: 93%

“…: the activity) of the radioisotope in the sample under analysis. The specific activity of samples was estimated according to the maximum likelihood algorithm [24]. The variance reduction technique was applied to calculate both the weights and the standard deviations.…”

Section: Measurement Of Radionuclide Activity Concentrationsmentioning

confidence: 99%

“…Sardinian dimension stones tested for radon emission [10]. K) in the material under investigation, three indexes are commonly used: the activity concentration index (I γ ) [26], the external radiation hazard (H ex ) [27] and the Radium equivalent activity (Ra eq ) [24]. Equations 1 to 3 describe the three indexes:…”

Section: Exposure Indexesmentioning

confidence: 99%

See 2 more Smart Citations

Natural radioactivity and radon exhalation rate of Sardinian dimension stones

Dentoni

Pelo

Aghdam

et al. 2020

Construction and Building Materials

View full text Add to dashboard Cite

Due to the ever-growing public concern about radon risk arising from building materials, the radon exhalation rates and the natural radioactivity of eighteen dimension stones mostly used in Sardinia and widely exported worldwide have been estimated by means of laboratory tests. Some of the quarrying companies that operate within the Sardinian territory provided the samples to be tested, which include twelve granitoids, four pyroclastic rocks and two basalts. The Activity Concentration Index (I ɤ ), the External Radiation Hazard Index (H ex ) and the Radium equivalent activity (Ra eq ) were calculated for each rock sample under investigation, based on the estimated values of 222 Rn exhalation rate and 226 Ra, 232 Th and 40 K radioactivity concentration. A poor correlation between radon release rates and 226 Ra radioactivity concentrations was found. The contribution to indoor radon accumulation was also simulated for the stone with the highest 222 Rn exhalation rate and the resulting concentration compared with the limit value establish by the 2013/59/Euratom Directive. These findings can be extended to rocks formed in similar geodynamic settings that are likely to produce igneous rocks with similar petrographic and geochemical features.

show abstract

“…None of those indexes exceeded the reference limits. The results were found in agreement with previous studies [14,16,24]. Fig.…”

Section: Measurements Results and Risk Indexessupporting

confidence: 93%

Section: Measurement Of Radionuclide Activity Concentrationsmentioning

confidence: 99%

See 1 more Smart Citation

Natural radioactivity and radon exhalation rate of Sardinian dimension stones

Dentoni

Pelo

Aghdam

et al. 2020

Construction and Building Materials

View full text Add to dashboard Cite

show abstract

“…The ranges of activity concentrations of 226 Ra, 232 Th, and 40 K for samples of brick and sand recorded in this study are comparable to the values obtained in Egypt and India (Medhat 2009;Ravisankar et al 2014), while results obtained for cement are comparable to those measured in Nigeria (Agbalagba et al 2014). The activity concentrations of these radionuclides measured in the samples of gypsum and granite are also comparable with results from other Iranian studies (Mehdizadeh et al 2011;Ashrafi and Jahanbakhsh 2019), while the results obtained for ceramic are comparable to Serbian (Kuzmanović et al 2020) but dramatically lower than those from China and Saudi Arabia (Tuo et al 2020;Al-Sewaidan 2019). The activity concentrations of these radionuclides for the samples of tile and marble were higher compared to results from Italy (Righi and Bruzzi 2006).…”

Section: Specific Radioactivitysupporting

confidence: 91%

Natural radioactivity and radiological risks of common building materials used in Semnan Province dwellings, Iran

Imani

Adelikhah

Shahrokhi

et al. 2021

Environ Sci Pollut Res

View full text Add to dashboard Cite

Impact assessment of building materials is a focused topic in the field of radioecology. A radiological survey has conducted to monitor radioactivity of most common building materials in Semnan Province, Iran, and assess the radiation risk. Activity concentrations of 226Ra, 232Th, and 40K were measured in 29 samples including nine commonly used building materials that were collected from local suppliers and manufacturers, using a high purity germanium gamma-ray detector. The activity concentrations of 226Ra, 232Th, and 40K varied from 6.7±1 to 43.6±9, 5.9±1 to 60±11, and 28.5±3 to 1085±113 Bq kg−1 with averages of 26.8±5, 22.7±4, and 322.4±4 Bq kg−1, respectively. By applying multivariate statistical approach (Pearson correlation, cluster, and principal component analyses (PCA)), the radiological health hazard parameters were analyzed to obtain similarities and correlations between the various samples. The Pearson correlation showed that the 226Ra distribution in the samples is controlled by changing the 232Th concentration. The variance of 95.58% obtained from PCA resulted that the main radiological health hazard parameters exist due to the concentration of 226Ra and 232Th. The resulting dendrogram of cluster analysis also shows a well coincidence with the correlation analysis.

show abstract

Arud granitic intrusion, the most probable source of radiation in high background natural radiation areas of Ramsar, North Iran

Birami

Moore

2021

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Measurement of natural radioactivity of Iranian granite samples using beta–gamma coincidence spectrometer and maximum likelihood method

Cited by 6 publications

References 14 publications

Natural radioactivity and radon exhalation rate of Sardinian dimension stones

Natural radioactivity and radon exhalation rate of Sardinian dimension stones

Natural radioactivity and radiological risks of common building materials used in Semnan Province dwellings, Iran

Arud granitic intrusion, the most probable source of radiation in high background natural radiation areas of Ramsar, North Iran

Contact Info

Product

Resources

About