Changes of natural ionizing radiation in anthropogenic objects
Dosimetric investigations that were performed in various geographic places, mostly connected to anthropogenic activities, are observed in this work. Equivalent dose rate was measured with a radiometer SRP‐68, 0,3 m above the point of investigation. It is determined that equivalent dose rate chang...
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| Format: | Article |
| Language: | English |
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Vilnius Gediminas Technical University
2005-09-01
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| Series: | Journal of Environmental Engineering and Landscape Management |
| Subjects: | |
| Online Access: | https://www.bme.vgtu.lt/index.php/JEELM/article/view/8044 |
| _version_ | 1819291106767011840 |
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| author | Viktorija Bogdevičiene Milda Pečiuliene Aloyzas Girgždys |
| author_facet | Viktorija Bogdevičiene Milda Pečiuliene Aloyzas Girgždys |
| author_sort | Viktorija Bogdevičiene |
| collection | DOAJ |
| description | Dosimetric investigations that were performed in various geographic places, mostly connected to anthropogenic activities, are observed in this work. Equivalent dose rate was measured with a radiometer SRP‐68, 0,3 m above the point of investigation.
It is determined that equivalent dose rate changes from 97 nSv/h measured above a non‐arable field soil to 219 nSv/h measured in a tunnel. The hignest values of equivalent dose rate are in closed buildings with a bad ventilation system. It is noticed that the specific activity of 40K and 226Ra changes depending on the depth of a trench. The specific activity of 40K is the highest at the deepest point (441 Bq/kg) of a trench; the highest specific activity of 226Ra is at the ground level (37 Bq/kg).
Gamtinės jonizuojančiosios spinduliuotės pokyčiai žmogaus veiklos objektuose
Santrauka
Atlikti dozimetriniai bei spektrometriniai tyrimai įvairiose geofizinėse vietose, labiausiai susijusiose su antropogenine veikla. Lygiavertes dozės galia išmatuota radiometru SRP‐68 0,3 m aukštyje virš tiriamo taško. Nustatyta, kad lygiavertės dozės galia kinta nuo 97 nSv/h dirvoje iki 219 nSv/h tunelyje. Didžiausios gamtinės kilmės radionuklidų sukeltos lygiavertės dozės galios reikšmės yra uždarose, blogai vėdinamose patalpose. Pastebėta, kad 40K ir 226Ra savitasis aktyvumas priklauso nuo gylio. 40K savitasis aktyvumas didžiausias giliausiame taške (441 Bq/kg), o 226Ra ‐ atvirkščiai ‐ aukščiausiame taške (37 Bq/kg).
Reikšminiai žodžiai: jonizuojančioji spinduliuotė, gamtines kilmės radionuklidai, dozimetrija, lygiavertės dozės galia, savitasis aktyvumas
First Published Online: 14 Oct 2010 |
| first_indexed | 2024-12-24T03:33:22Z |
| format | Article |
| id | doaj.art-70175faea855469cbd7e6aec3949f3bc |
| institution | Directory Open Access Journal |
| issn | 1648-6897 1822-4199 |
| language | English |
| last_indexed | 2024-12-24T03:33:22Z |
| publishDate | 2005-09-01 |
| publisher | Vilnius Gediminas Technical University |
| record_format | Article |
| series | Journal of Environmental Engineering and Landscape Management |
| spelling | doaj.art-70175faea855469cbd7e6aec3949f3bc2022-12-21T17:17:08ZengVilnius Gediminas Technical UniversityJournal of Environmental Engineering and Landscape Management1648-68971822-41992005-09-0113310.3846/16486897.2005.9636856Changes of natural ionizing radiation in anthropogenic objectsViktorija Bogdevičiene0Milda Pečiuliene1Aloyzas Girgždys2Laboratory of Nuclear Hydrophysics , Vilnius Gediminas Technical University , Sauletekio al. 11, Vilnius‐40 , LT‐10223 , LithuaniaLaboratory of Nuclear Hydrophysics , Vilnius Gediminas Technical University , Sauletekio al. 11, Vilnius‐40 , LT‐10223 , LithuaniaLaboratory of Nuclear Hydrophysics , Vilnius Gediminas Technical University , Sauletekio al. 11, Vilnius‐40 , LT‐10223 , LithuaniaDosimetric investigations that were performed in various geographic places, mostly connected to anthropogenic activities, are observed in this work. Equivalent dose rate was measured with a radiometer SRP‐68, 0,3 m above the point of investigation. It is determined that equivalent dose rate changes from 97 nSv/h measured above a non‐arable field soil to 219 nSv/h measured in a tunnel. The hignest values of equivalent dose rate are in closed buildings with a bad ventilation system. It is noticed that the specific activity of 40K and 226Ra changes depending on the depth of a trench. The specific activity of 40K is the highest at the deepest point (441 Bq/kg) of a trench; the highest specific activity of 226Ra is at the ground level (37 Bq/kg). Gamtinės jonizuojančiosios spinduliuotės pokyčiai žmogaus veiklos objektuose Santrauka Atlikti dozimetriniai bei spektrometriniai tyrimai įvairiose geofizinėse vietose, labiausiai susijusiose su antropogenine veikla. Lygiavertes dozės galia išmatuota radiometru SRP‐68 0,3 m aukštyje virš tiriamo taško. Nustatyta, kad lygiavertės dozės galia kinta nuo 97 nSv/h dirvoje iki 219 nSv/h tunelyje. Didžiausios gamtinės kilmės radionuklidų sukeltos lygiavertės dozės galios reikšmės yra uždarose, blogai vėdinamose patalpose. Pastebėta, kad 40K ir 226Ra savitasis aktyvumas priklauso nuo gylio. 40K savitasis aktyvumas didžiausias giliausiame taške (441 Bq/kg), o 226Ra ‐ atvirkščiai ‐ aukščiausiame taške (37 Bq/kg). Reikšminiai žodžiai: jonizuojančioji spinduliuotė, gamtines kilmės radionuklidai, dozimetrija, lygiavertės dozės galia, savitasis aktyvumas First Published Online: 14 Oct 2010https://www.bme.vgtu.lt/index.php/JEELM/article/view/8044ionizing radiationnatural radionuclidesdosimetryequivalent dose ratespecific activity |
| spellingShingle | Viktorija Bogdevičiene Milda Pečiuliene Aloyzas Girgždys Changes of natural ionizing radiation in anthropogenic objects Journal of Environmental Engineering and Landscape Management ionizing radiation natural radionuclides dosimetry equivalent dose rate specific activity |
| title | Changes of natural ionizing radiation in anthropogenic objects |
| title_full | Changes of natural ionizing radiation in anthropogenic objects |
| title_fullStr | Changes of natural ionizing radiation in anthropogenic objects |
| title_full_unstemmed | Changes of natural ionizing radiation in anthropogenic objects |
| title_short | Changes of natural ionizing radiation in anthropogenic objects |
| title_sort | changes of natural ionizing radiation in anthropogenic objects |
| topic | ionizing radiation natural radionuclides dosimetry equivalent dose rate specific activity |
| url | https://www.bme.vgtu.lt/index.php/JEELM/article/view/8044 |
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