|
|
|
 |
Search published articles |
 |
|
Showing 3 results for Gonad
M.t. Bahreyni Toossi, Sh. Bayani, M. Yarahmadi, A. Aghamir, A. Jomehzadeh, M. Hagh Parast, A. Tamjidi,
Volume 7, Issue 1 (6-2009)
Abstract
Background: Since 1996 the assessment of
environmental gamma radiation dose in residential
areas of Iranian towns and cities has been
accomplished for 10 counties. As a practical method
and based on the results of a pilot study, in order to
attribute the final results to the whole residential area
of a town five stations were selected for every town.
The location of individual station was studied closely
to comply with recommended conditions in the
literature. Materials and Methods: RDS-110 was
employed to measure gamma dose rate for one hour.
Average annual dose rates plus conversion
coefficients were employed to estimate gonad, bone
marrow, equivalent and effective dose. Result:
Minimum and maximum annual bone marrow and
gonad dose equivalent attributed to environmental
gamma are 0.24 mSvy-1 (for both tissues) and 1.44
and 1.46 mSvy-1, respectively. Conclusion: Average
gonad and bone marrow doses for North Khorasan,
Boshehr and Hormozgan provinces were less than
the corresponding values for normal area. Iran. J.
Radiat. Res., 2009 7 (1): 41-47
Dr. R.l. Njinga, V.m. Tshivhase, U.u. Elele,
Volume 17, Issue 1 (1-2019)
Abstract
Background: All human beings and living organisms are exposed to natural radiations on daily basis, which is mainly due to the activity concentration of primordial radionuclides 232Th, 238U and their products of decay together with the natural radionuclide 40K present in the earth’s crust. Materials and Methods: A total of 59 soil samples were collected around the banks and surroundings of the Lancaster dam using an auger at a depth of about 0.75 meters from the top surface. The samples were analysed using low background co-axial n-type High Purity Germanium (HPGe) detector of high-resolution and the resulting spectrum were analysed using Canberra Genie software. Results: This study revealed that the activity concentration values are in the order of 232Th <40K<238U in all sampling sites. A statistical analysis based on Pearson correlation showed a positive correlation between the radiological parameters and the two primordial radionuclides 232Th, 238U and the natural radionuclide 40K. Conclusion: This implied that the two primordial radionuclides 232Th, 238U and their products of decay including the natural radionuclide 40K contribute to the emission of gamma radiation in all the locations of the study area. The calculated 238U/232Th concentration ratio in soils of present study was almost six times higher compared with different countries of the world.
Dr. M.a. Al-Kaabi, A.n. Hmood,
Volume 17, Issue 1 (1-2019)
Abstract
Background: Man-made radionuclides, which are present in environment, have been created by human activities and added to the inventory of natural radionuclides for example 3H, 131I, 129I, 137Cs, 90Sr and 239Pu, in spite of the amount added is little compared to natural quantities. The aim of this study is to estimate the levels of radiological doses in the soil samples collected from different locations in Kerbala city, Iraq. Materials and Methods: Thirty soil samples were collected from different sites of Karbala city and gamma-ray spectroscopy system with NaI (Tl) "1.5×2" detector in low-background and 24 hours used to achieve the results. Results: The average values of absorbed gamma-ray dose rate, annual effective dose equivalent and annual gonadal dose equivalent were found to be 14.09±0.32, 19.59±0.39 and 112.81±2.25 respectively. The average values of gamma representative level index and external hazard index resulting from natural radionuclides for all samples in the study area were 0.25±0.005 and 0.09±0.002 respectively. Conclusion: The obtained results in current work were compared with some results of soil samples in literature over the world. They do not exceed the upper limit calculated by UNSCEAR reports.
|
|
