International Journal of Radiation Research
نشریه پرتو پژوه
Int J Radiat Res
Basic Sciences
http://ijrr.com
79
journal79
2322-3243
2345-4229
10.61186/ijrr
en
jalali
1383
12
1
gregorian
2005
3
1
2
4
online
1
fulltext
en
Gross beta activities and Beryllium-7 concentrations in surface air
Radiation Biology
Radiation Biology
تحقيق بديع
Original Research
<b><font face="TimesNewRoman,Bold" size="3"><p align="left">ABSTRACT </p></font><font face="TimesNewRoman,Bold" size="1"><p align="left" ></font><font face="TimesNewRoman,Bold" size="3"><p align="left">Background: </p><p align="left">were made each week during year 2002 from samples of atmospheric aerosols filtered from the</p><p align="left">air at Tehran Nuclear Research Center.</p></font><font face="TimesNewRoman" size="3">Measurement of gross beta activities and cosmogenic Beryllium-7 concentrations</font><b><font face="TimesNewRoman,Bold" size="3"><p align="left">Materials and Methods</p><p align="left">sampler at the Nuclear Research Center meteorological station in Tehran (40</p><p align="left">contents of samples were determined with semiconductor gamma spectrometry. The long-lived</p><p align="left">beta activity, i.e. total beta activity measured four days after the end of sampling (after decay of</p></font><font face="TimesNewRoman" size="3">: The aerosol samples were collected weekly with high-volume air</font><font face="TimesNewRoman" size="1">o </font><font face="TimesNewRoman" size="3">35. N). The </font><font face="TimesNewRoman" size="1">7</font><font face="TimesNewRoman" size="3">Be</font><font face="TimesNewRoman" size="1"><p align="left">220</p><p align="left">The long-lived beta activity consists mainly of </p><p align="left">amount of artificial radionuclides in the air is negligible.</p></font><font face="TimesNewRoman" size="3">Rn progeny and short-lived </font><font face="TimesNewRoman" size="1">220</font><font face="TimesNewRoman" size="3">Rn progeny), was assessed with an automatic beta analyzer.</font><font face="TimesNewRoman" size="1">210</font><font face="TimesNewRoman" size="3">Bi, the daughter nuclide of </font><font face="TimesNewRoman" size="1">210</font><font face="TimesNewRoman" size="3">Pb, as the</font><b><font face="TimesNewRoman,Bold" size="3"><p align="left">Results: </p><p align="left">lognormal distribution during the study period 2002. The arithmetic mean of annual concentrations</p><p align="left">of </p></font><font face="TimesNewRoman" size="3">The air concentrations of both the </font><font face="TimesNewRoman" size="1">7</font><font face="TimesNewRoman" size="3">Be and the long-lived beta activity displayed a</font><font face="TimesNewRoman" size="1">7</font><font face="TimesNewRoman" size="3">Be and </font><font face="TimesNewRoman" size="1">210 </font><font face="TimesNewRoman" size="3">Pb was 6.30 and 0.50 mBqm</font><font face="TimesNewRoman" size="1">-3</font><font face="TimesNewRoman" size="3">, respectively .</font><b><font face="TimesNewRoman,Bold" size="3"><p align="left">Conclusion: </p><p align="left">beta activities are partially correlated. Both have maximum concentrations during warm</p><p align="left">mid-year months. </p></font><font face="TimesNewRoman" size="3">Despite the different origins, the concentrations of both the </font><font face="TimesNewRoman" size="1">7</font><font face="TimesNewRoman" size="3">Be and the long.lived</font><i><font face="TimesNewRoman,Italic" size="3">Iran. J. Radiat. Res., 2005 2 (4): 211-213</font></i></b></b></b></b>
,lead-210,gamma spectrometry,gross beta activity,Beryllium-7 concentrations
211
213
http://ijrr.com/browse.php?a_code=A-10-1-88&slc_lang=en&sid=1
F. Arkian
arkian 1@yahoo.com
79003194753284600224
79003194753284600224
Yes
J. Amidi
79003194753284600225
79003194753284600225
No