نتایج جستجو برای: radon progeny

تعداد نتایج: 19985  

Introduction CR-39 detectors are widely used for Radon and progeny measurement in the air. In this paper, using the Monte Carlo simulation, the possibility of using the CR-39 for direct measurement of Radon and progeny in water is investigated. Materials and Methods Assuming the random position and angle of alpha particle emitted by Radon and progeny, alpha energy and angular spectrum that arri...

Journal: :iranian journal of medical physics 0

introduction cr-39 detectors are widely used for radon and progeny measurement in the air. in this paper, using the monte carlo simulation, the possibility of using the cr-39 for direct measurement of radon and progeny in water is investigated. materials and methods assuming the random position and angle of alpha particle emitted by radon and progeny, alpha energy and angular spectrum that arri...

Journal: :iranian journal of medical physics 0
shila banari bahnamiri physics department, faculty of science, ferdowsi university of mashhad, mashhad, iran

introduction the potential hazards posed by exposure to radiation from radon have been of great concern worldwide, since it is especially associated with increased risk of lung cancer. some radioisotopes of radon progeny deposited in the human lungs emit β particles followed by the γ rays. while γ rays are comparatively less damaging to the respiratory system than α and β particles, it is the p...

K. Charan Kumar, K. Nagaraja, M. Venkataratnam, T. Narayana Rao, T. Rajendra Prasad,

Background: The variation of the radon progeny concentration in outdoor environment and meteorological parameters at fine resolution were studied for one year at a continental location, National Atmospheric Research Laboratory, Gadanki, India.  Materials and Methods: The concentrations were measured using Alpha Progeny Meter by collecting air samples at a height of 1 m above the Earth&rsqu...

Reza Izadi Najafabadi Seyed Hashem Miri Hakimabad Shila Banari Bahnamiri,

Introduction The potential hazards posed by exposure to radiation from radon have been of great concern worldwide, since it is especially associated with increased risk of lung cancer. Some radioisotopes of radon progeny deposited in the human lungs emit β particles followed by the γ rays. While γ rays are comparatively less damaging to the respiratory system than α and β particles, it is the p...

Journal: :iranian journal of radiation research 0
k. kant aggarwal college, ballabgarh, faridabad, 121 004; formerly at department of physics, kl mehta dn college for women, faridabad, haryana, 121 001, india rashmi department of physics, gfitm, ballabgarh, faridabad, haryana, india r.g. sonkawade inter university accelerator centre, new delhi, 110 067, india g.s. sharma department of physics, g.l.a. institute of technology and management, mathura (u.p) 281 001, india r.p. chauhan department of applied physics, nit, kurukshetra, 136 119, india s.k. chakarvarti department of applied physics, nit, kurukshetra, 136 119, india

background: radon and thoron are invisible, odorless, heavy and radioactive gases which are ubiquitously present in dwellings and in the environment. in the present work, seasonal variation of indoor radon, thoron and their progeny concentrations has been studied in the dwellings of industrially polluted cities in district faridabad, haryana and district mathura in uttar pradesh. materials and ...

Rashmi, G.S. Sharma, K. Kant, R.G. Sonkawade, R.P. Chauhan, S.K. Chakarvarti,

Background: Radon and thoron are invisible, odorless, heavy and radioactive gases which are ubiquitously present in dwellings and in the environment. In the present work, seasonal variation of indoor radon, thoron and their progeny concentrations has been studied in the dwellings of industrially polluted cities in District Faridabad, Haryana and District Mathura in Uttar Pradesh. Materials and ...

Journal: :iranian journal of radiation research 0
k. charan kumar atmospheric and space science research (assr) lab, department of physics, bangalore university, bangalore 560 056, india t. rajendra prasad national atmospheric research laboratory, gadanki, 517 112, india t. narayana rao national atmospheric research laboratory, gadanki, 517 112, india m. venkataratnam national atmospheric research laboratory, gadanki, 517 112, india k. nagaraja atmospheric and space science research (assr) lab, department of physics, bangalore university, bangalore 560 056, india

background: the variation of the radon progeny concentration in outdoor environment and meteorological parameters at fine resolution were studied for one year at a continental location, national atmospheric research laboratory, gadanki, india.  materials and methods: the concentrations were measured using alpha progeny meter by collecting air samples at a height of 1 m above the earth’s surface...

G. S. Sharma, K. Kant, S. B. Upadhyay, S. K. Chakarvarti,

Background: Radon, an invisible, odorless, heaviest (nine times heavier than air) and radioactive gas is an aberration (the only gas in the long decay chain of heavy metal elements). It is ubiquitously present in dwellings and in the environment. Humans receive the greatest radiation dose in their homes. That's where they spend most time - typically 70%, more for small children. Recent worldwid...

2000
T. Iimoto T. Kosako

INTRODUCTION The Rn(radon) family is the most significant source of exposure to natural radiation, causing about one-half of the public effective dose. A number of international organizations, including UNSCEAR (United Nations Scientific Committee on the Effects of Atomic Radiation) and ICRP (International Commission on Radiological Protection) have officially reported this fact since the 1980’...

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