An improved in situ method for determining depth distributions of gamma-ray emitting radionuclides

2001 ◽  
Vol 463 (1-2) ◽  
pp. 393-412 ◽  
Author(s):  
Roland R. Benke ◽  
Kimberlee J. Kearfott
Keyword(s):  
Gamma Ray ◽  
In Situ Method ◽  
Depth Distributions

In situ study of the 41Ar plume released from the Ignalina NPP

Open Physics ◽  
2008 ◽  
Vol 6 (4) ◽  
Author(s):  
Rimvydas Jasiulionis ◽  
Linas Vyčinas ◽  
Andrej Rožkov
Keyword(s):  
Gamma Rays ◽  
Nuclear Power ◽  
Gamma Ray ◽  
Emission Rate ◽  
Technological Regime ◽  
In Situ Study ◽  
In Situ Method ◽  
Operating Reactor

AbstractThe 41Ar gamma ray radiation was registered using the in situ method in the vicinity of the Ignalina nuclear power plant (NPP). The sum of gamma rays, that are reaching the HPGe detector, situated along the wind direction, from a number of plume segments and which are registered in the energy range of about 1.29 MeV, is calculated. An independent technological regime of the operating reactor method of the determination of the 41Ar emission rate from NPP stack is introduced.

A 4-point in-situ method to locate a discrete gamma-ray source in 3-D space

2010 ◽  
Vol 68 (2) ◽  
pp. 370-377 ◽  
Author(s):  
Jong-In Byun ◽  
Hee-Yeoul Choi ◽  
Ju-Yong Yun
Keyword(s):  
Gamma Ray ◽  
In Situ Method

scholarly journals Study the influences of the radionuclide depth distributions on the FEPE for the measurements of the soil activity using in situ HPGe gamma spectrometry

2021 ◽  
Vol 7 (2) ◽  
pp. 25-31
Author(s):  
Hong Loan Truong Thi ◽  
Ngoc Ba Vu ◽  
Quoc Dan Le Hung ◽  
Ngan Thy Truong Huu ◽  
Yen Hong Huynh Thi
Keyword(s):  
Gamma Ray ◽  
Peak Efficiency ◽  
Exponential Form ◽  
Energy Peak ◽  
Full Energy Peak Efficiency ◽  
Uniform Model ◽  
Soil Activity ◽  
Hpge Gamma Spectrometry ◽  
Depth Distributions

In this work, the influences of the soil densities and the radionuclide depth distributions(RDD) on the Full Energy Peak Efficiency (FEPE) calculation of the in-situ gamma rayspectrometer using the In Situ Object Counting Systems (ISOCS) software were studied. The data of the RDDs at the sites were investigated by using laboratory HPGe gamma spectrometer. Six different RDDs of 40K, 226Ra and 232Th were found at four studied sites with radionuclide deposition moving from surface to deeper positions. The results show that FEPE values vary strongly for the different RDDs, especially for the low gamma ray energies. Use of the uniform model for calculating FEPEs can result in noticeable errors from 29% to 101% for the realistic RDD of the exponential form (surfaceradionuclide deposition), negative variations from 14% to 30% for the realistic RDD of having a radionuclide deposition at the 30 cm depth, and negligible variations of less than 5 % for the realistic RDD of quasi uniform form in the range of gamma ray energies of interest.

scholarly journals In-situ gamma-ray background measurements for next generation CDEX experiment in the China Jinping Underground Laboratory

2021 ◽  
Vol 128 ◽  
pp. 102560
Author(s):  
H. Ma ◽  
Z. She ◽  
W.H. Zeng ◽  
Z. Zeng ◽  
M.K. Jing ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Underground Laboratory ◽  
Next Generation

scholarly journals Application of Furcellaran Nanocomposite Film as Packaging of Cheese

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1428
Author(s):  
Agnieszka Pluta-Kubica ◽  
Ewelina Jamróz ◽  
Gohar Khachatryan ◽  
Adam Florkiewicz ◽  
Pavel Kopel
Keyword(s):  
Silver Nanoparticles ◽  
Nanocomposite Film ◽  
Microbiological Quality ◽  
Inhibitory Effect ◽  
Quality Properties ◽  
In Situ Method ◽  
And Migration ◽  
Total Bacteria

There is a serious need to develop and test new biodegradable packaging which could at least partially replace petroleum-based materials. Therefore, the objective of this work was to examine the influence of the recently developed furcellaran nanocomposite film with silver nanoparticles (obtained by an in situ method) on the quality properties of two cheese varieties: a rennet-curd (gouda) and an acid-curd (quark) cheese. The water content, physicochemical properties, microbiological and organoleptic quality of cheese, and migration of silver nanoparticles were examined. Both the number of Lactococcus and total bacteria count did not differ during storage of gouda regardless of the packaging applied. The number of Lactococcus decreased in analogous quark samples. The use of the film slowed down and inhibited the growth of yeast in gouda and quark, respectively. An inhibitory effect of this film on mold count was also observed; however, only regarding gouda. The level of silver migration was found to be lower in quark than in gouda. The film improved the microbiological quality of cheeses during storage. Consequently, it is worth continuing research for the improvement of this film in order to enable its use in everyday life.

Photocatalytic degradation of tetracycline under visible light using TiO2@sulfur doped carbon nitride nanocomposite synthesized via in-situ method

2021 ◽  
Vol 9 (4) ◽  
pp. 105560
Author(s):  
Krishnan Divakaran ◽  
Amanulla Baishnisha ◽  
Vellaichamy Balakumar ◽  
Krishnan Nattamai Perumal ◽  
Chandran Meenakshi ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Carbon Nitride ◽  
In Situ Method
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