Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userMeasuring the radioactivity of the isotope bismuth Bi-212 in soil samples from the Country of Lattakia by gamma spectpometry and alpha-spectpometry
قياس النشاط الإشعاعي لنظير البزموت Bi-212 في عينات تربة من ريف اللاذقية بواسطة مطيافية غاما و مطيافية ألفا
1049
0 60
0
(
0
)
Added by
Tishreen University ورقة بحثية
Publication date
2017
fields
Physics
and research's language is
العربية
Created by
Shamra Editor
Ask ChatGPT about the research
تم في هذا البحث, قياس النشاط الإشعاعي للبزموت- 212 في تربة قرية عين ليلون- منطقة الحفة- مدينة اللاذقية باستخدام مطيافية غاما وذلك للتأكد من المحتوى الإشعاعي للتربة, ثم جرى قياس النشاط الإشعاعي للبزموت -212 باستخدام مطيافية ألفا, وذلك بعد تهضيم 10g من التربة باستخدام حمض الآزوت و حمض الكبريت المركز, ثم ترسيبها تلقائياً على أقراص فضة عالية النقاوة. تشير النتائج إلى أن: النشاط الإشعاعي للبزموت-212 (1,48 Bq) باستخدام مطيافية غاما و (2,05 Bq) باستخدام مطيافية ألفا و هي ضمن الحدود المسموح بها دولياً. آخذين بالحسبان الأخطاء المرتكبة في القياسات.
In this research, measurement of radioactivity of bismuth-212 in the soil of the village of the Ien Lailonin- Alhafah area- Latakia city using gamma spectrometry to make sure the radioactive content to soil, and was measuring the radioactivity of bismuth-212 using the alpha spectroscopy, after digestion 10g of soil using nitric acid and sulfuric acid concentrated, and then spontaneaous deposition into high purity a silver disc. the results show that: the radioactivity of bismuth-212 (1,48Bq) using gamma spectrometry and (2,05Bq)using the alpha spectroscopy It is within the range allowed international border ,taking into account the errors in measurements.
References used
WARD, F. N; CROWE ,H.E. Colormatric determinations of tracers of Bismuth in rocks.1nd.ed.,U.S .Government Printing Office, Washington,1956,14
WARD,F.N;NAKAGAWA,H.M; HARMS,T.F; VANSICKL, G.H. Atomic- Absorption-Methods of Analysis Usefulin Geochemical Exploration.1nd.ed.,U.S .Government Printing Office, Washington,1969,45
ELSHERIF,K.M; BENKHAYAL,A.A; KUSS,H.M. Simaultaneous Determination Of Cu, Mn, Bi and Sb Using Multilement Graphite Furnace Atomic Absorption Spectrometer. ACPI Indica. Vol.3,2013,241-249
rate research
Read More
In this research, we have measured the radioactivity resulting from the Cesium-137 and Potassium-40 isotopes, in milk samples (from different sources) in Lattakia’s regions. It has been found that all samples were not contaminated by Cesium-137, but
it was recorded that all samples containing radioactivity resulting from the Potasium-40 isotope with a magnitude range between , and average value . As compared with other world results, there was a good agreement between them, taking into account the errors in measurements.
In this work, we have used the basic techniques for measuring gamma rays. It is
based on the use of a sodium iodide (NaI) detector withthallium activated (Tl). We have
obtained:
The detector calibration NaI(Tl) and the resolution of the spectrom
eter.
Measuring and determining the activity of a source can be doneby using the
relative, and the absolute method.
The results obtained show bythe Comparison between the experimental and the
theoretical(of the sources activities)a good agreement, and the best values obtained by the
absolute method.
The Mediterranean region is world’s leading olive growing area. A large amount of
liquid waste results from olive oil extraction these wastewaters have a different effects an
environmental . In this study, four fungal isolates from Samples of soil
Polluted by olive
mill wastewater ,this isolates follow to several types from deuteromycetes, they are follow
to this types : Humicola sp., paecilomyces javanicus, Aspergillus terreus, Aspergillus
flavus. They isolated them on tow media (PDA, CzA) and identify them on colony
character ,Biometric and compare them with reference studies.
In this experimental work, the instruments used (detector, calibrating sources) has been calibrating, the calibration line of the detector deduced and it has been finding that the equation of calibration line takes the form:
The resolution power R
has been studying as function of the distance between the activity source and detector; the results obtained show that R decrease by increase the energy of the lines spectrum, this mean that the detector resolution power become bigger.
It has been measured the LC، LD and MDA using two different methods of background radiation value, trapezium method and classical method, for two different distances between radioactivity source and detector: (9,3cm) and (10cm). The results show:
1- There is similar comportment of the LC، LD and MDA in function energy and the distance between radioactivity source and detector.
2- The trapezium method gives better results from the classical method to the radiation background, and this leads to lesser MDA value, this means that the sensibility is bigger to measure this quantity.
3- The relative error using MDA is (5%) for large values, and (10%) for small values
Gamma rays
sodium iodide activated by Thallium
calibration line
resolution detector
source activity
detector efficiency
minimum detectable activity
background radiation level
أشعة غاما
كاشف يوديد الصوديوم المشوب بالتاليوم
مستقيم المعايرة
قدرة الفصل الطيفية
منبع مُشع
كفاءة كاشف
الحد الأدنى لمكشف
ضجيج خلفي
المزيد..
Quality Control procedure Of Gamma Spectrometry measurements using
semi conductor HPGe Detectors and determination the uncertainty budget of
the measurements and calibrations have been prepared.
Depending on this procedure we can evaluate the qual
ity of the results to be
accepted or not, and where the correction actions should be used.
suggested questions
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
