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- BALOCH Muzahir Ali
- COMSATS Institute of Information Technology (CIIT), Department of Physics
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- QURESHI Aziz Ahmed
- COMSATS Institute of Information Technology (CIIT), Department of Physics
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- WAHEED Abdul
- COMSATS Institute of Information Technology (CIIT), Department of Physics
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- ALI Muhammad
- COMSATS Institute of Information Technology (CIIT), Department of Physics
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- ALI Nawab
- Physics Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH)
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- TUFAIL Muhammad
- Riphah International University
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- BATOOL Saima
- COMSATS Institute of Information Technology (CIIT), Department of Physics
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- AKRAM Muhammad
- Physics Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH)
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- IFTIKHAR Poonam
- COMSATS Institute of Information Technology (CIIT), Department of Physics
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- QAYYUM Hamza
- COMSATS Institute of Information Technology (CIIT), Department of Physics
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- MANZOOR Shahid
- COMSATS Institute of Information Technology (CIIT), Department of Physics
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- KHAN Hameed Ahmed
- COMSATS Institute of Information Technology (CIIT), Department of Physics
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抄録
The Khewra Salt Mines, the second largest salt mines in the world, are located 160 km south of Islamabad, the capital of Pakistan. Around 1000 workers are involved in the removal of salt from these mines. More than 40,000 visitors come annually to see the mines. The visitors and workers are directly exposed to the internal and external radiological hazards of radon and gamma rays in these mines. The general public is affected by the intake of the salt containing the naturally occurring radionuclides. Therefore the concentration of radon (222Rn) in the Khewra Salt Mines and activity concentrations of the naturally occurring radionuclides in the salt samples from these mines were measured. Both active and passive techniques were employed for the measurement of radon with Radon Alpha Detector (RAD-7) and SSNTD respectively. The concentration of 222Rn was 26 ± 4 Bq m–3 measured by the active method while 43 ± 8 Bq m–3 was measured by the passive method. The activity concentration of the radionuclides was measured using gamma ray spectrometry with HPGe detector. The mean activity of 40K in salt samples was found to be 36 ± 20 Bq kg–1 and the concentration of 226Ra and 232Th in the salt samples was below the detection limits. Gamma radiation hazard was assessed in terms of the external gamma dose from salt slabs and the rooms made of salt and the annual effective dose due to gamma radiation. The exposure to radon daughters, annual effective dose and excessive lifetime cancer risk due to radon in the mines were estimated. The mean annual effective dose due to an intake of 40K from the salt was calculated as 20.0 ± 11.1 μSv, which is lower than the average annual effective dose rate of 0.29 mSv, received by the ingestion of natural radionuclides. Due to the low concentration values of primordial radionuclides in the salt and radon (222Rn) in the mines, a ‘low level activity measurement laboratory' is suggested to be established in these mines.
収録刊行物
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- Journal of Radiation Research
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Journal of Radiation Research 53 (3), 411-421, 2012
Journal of Radiation Research 編集委員会
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詳細情報 詳細情報について
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- CRID
- 1390001205215819136
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- NII論文ID
- 130001876853
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- NII書誌ID
- AA00705792
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- COI
- 1:STN:280:DC%2BC38jltlOrtA%3D%3D
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- ISSN
- 13499157
- 04493060
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- NDL書誌ID
- 023682712
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- PubMed
- 22739011
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可