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Wyszukujesz frazę "radioisotopes" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
The IBA self-extracting cyclotron project
Autorzy:
Kleeven, W.
Lucas, S.
Delvaux, J.
Swoboda, F.
Zaremba, S.
Beeckman, W.
Vandeplassche, D.
Abs, M.
Powiązania:
https://bibliotekanauki.pl/articles/148721.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cyclotron
extraction
radioisotopes
Opis:
The self-extracting cyclotron is a high-intensity 14 MeV H+ machine for isotope production. There is no electrostatic deflector. Extraction is achieved with a special shaping of the magnetic field. There are two long poles and two short poles, both with an elliptical gap profile; this provides a steep fall off of the magnetic field at the pole radii. An extraction groove is machined in the iron of one of the longer poles. First harmonic coils create a large orbit separation at the entrance of the extraction path and extract the beam. The machine is presently installed in the industrial isotope production site where the final commissioning and tests took place. Beams of more than 1.5 mA have been extracted and transported. Further development is ongoing in order to increase the current on target to at least 2 mA in the coming months. Commercial isotope production will start in the course of this year. The concept of the machine is explained and the layout of the machine and beam lines is presented. Results of orbit calculations and central region optimizations are given. Results of the measurement of extracted beam shapes and emittances are given. The progress and present status of the project are discussed.
Źródło:
Nukleonika; 2003, 48,suppl.2; 59-67
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proficiency testing schemes on determination of radioactivity in food and environmental samples organized by the NAEA, Poland
Autorzy:
Polkowska-Motrenko, H.
Fuks, L.
Powiązania:
https://bibliotekanauki.pl/articles/148487.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
proficiency tests
radioactivity
man-made radioisotopes
Opis:
This paper presents the approach of conducting proficiency tests (PT) on the determination of radionuclides in food and environmental samples adopted by the Institute of Nuclear Chemistry and Technology (INCT), Warsaw, Poland and the results of the provided PTs. The PTs have been organized by the National Atomic Energy Agency (NAEA), Poland, since 2004. The activity of the following radionuclides: 241Am, 137Cs, 3H, 239Pu, 226Ra and 90Sr were determined. The test materials: water, milk powder, wheat flour and soil, were prepared by spiking blank materials with standard solution of the radionuclide of interest. The activity concentrations were calculated and associated uncertainties were evaluated before sending the test materials to the laboratories. The results provided by the participants were statistically evaluated by means of z and zeta scores as well as using the International Atomic Energy Agency (IAEA) criteria for trueness and precision. Observed trends and some benefits for the participants have been presented.
Źródło:
Nukleonika; 2010, 55, 2; 149-154
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Status report of the VINCY Cyclotron
Autorzy:
Nešković, N.
Ristić-Ðurović, J.
Vorojtsov, S. B.
Belicev, P.
Ivanenko, I. A.
Ćirković, S.
Vorozhtsov, A. S.
Bojović, B.
Dobrosavljević, A.
Vujović, V.
Comor, J. j.
Pajović, S. B.
Powiązania:
https://bibliotekanauki.pl/articles/146191.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
accelerators
cyclotrons
ion sources
radioisotopes
radiation research
Opis:
The VINCY Cyclotron is the main part of the TESLA Accelerator Installation. The diameter of the pole of this machine is 2000 mm. Its bending constant is 145 MeV while its focusing constant is 75 MeV. The radiofrequency system of the machine consists of two l/4-resonators with the eigenfrequency in the range from 17 to 31 MHz. Ions coming from a heavy ion source or a light ion source will be injected into the machine axially. They will be introduced into its median plane by a spiral inflector. Heavy ions accelerated in the machine will be extracted from it by a foil stripping system or by an electrostatic deflection system. Light ions will be extracted from it by the foil stripping system. The first programs of use of the VINCY Cyclotron are related to routine and experimental production of radioisotopes and radiopharmaceuticals, and to biomedical research with ion beams. The first beam extracted from the machine will be the proton beam of the energy of 22 MeV obtained from the H2+ beam extracted from the light ion source. This beam will be used first for production of radioisotope 18F and radio-pharmaceutical 18FDG, to be employed for positron emission tomography
Źródło:
Nukleonika; 2003, 48,suppl.2; 135-139
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of nuclear and radiation technologies in oil, gas and coal mining, distribution and power sector applications
Autorzy:
Chmielewski, A. G.
Powiązania:
https://bibliotekanauki.pl/articles/147271.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
nuclear techniques
radioisotopes
gamma scanning
nuclear gauges
Opis:
Nuclear and radiation technologies play an important role in power sector, starting from fossil fuels exploitation, their transport and distribution and finally power generation. Application of environmental isotopes, stable and radioactive, in ground water monitoring in the vicinity of open cast lignite mine, radon monitor applied for miner’s safety in deep coal mines and nucleonic control systems for ash in coal control are discussed in the paper. Other applications of nuclear techniques reviewed, concern the oil industry, oil field recovery, transportation pipelines and refineries. Finally, the application of beta radiation-based gauges for air borne fly ash monitoring and radiation technology for flue gas treatment are the examples of using this technique in power sector equipped with coal and oil fired boilers.
Źródło:
Nukleonika; 2008, 53, suppl. 2; 55-59
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sources of environmental radionuclides and recent results in analyses of bioaccumulation. A review
Autorzy:
Tykva, R.
Powiązania:
https://bibliotekanauki.pl/articles/147281.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
environmental radionuclides
sources
bioaccumulation
radioisotopes of heavy metals
Opis:
In principle, there are two sources of environmental radionuclides, namely natural and man-made. In comparison with other environmental pollutants as, e.g., heavy metals, some scientific and technical disciplines profit by the natural radionuclides, using them for age determination of the samples, e.g., hydrology, geology and archaeology. Nevertheless, the environmental radionuclides represent mostly risk for a human health. Therefore, in this review, their sources are shortly described and original recent analyses of some bioaccumulation methods are presented, using either selected plant species or microorganisms, respectively. The different uptakes in all systems were measured to evaluate the possibility of application of the tested biological materials as markers of environmental contamination. It was also demonstrated that the detection methods developed for analyses of bioaccumulation of environmental radionuclides could be applied in radiotracer methodology for a study of bioaccumulation of heavy metals. While gamma spectrometry for soil samples and liquid scintillation spectrometry for water samples were used, autoradiography was applied to analyze the distribution of radionuclides during and/or after bioaccumulation.
Źródło:
Nukleonika; 2004, 49,suppl.1; 3-7
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radionuclides 137Cs and 40K in the soils of the Tatra National Park (TPN, Poland)
Autorzy:
Kubica, B.
Skiba, S.
Drewnik, M.
Stobiński, M.
Kubica, M.
Gołaś, J.
Misiak, R.
Powiązania:
https://bibliotekanauki.pl/articles/148560.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
137Cs
40K
Tatra Mts.
gamma spectrometry
maps of the radioisotopes
Opis:
The paper presents the results of radioactivity determination of artificial 137Cs and natural 40K in soil samples taken from the Tatra Mountains in Poland (Tatra National Park – TPN). Soil samples were collected as the cores of 10 cm in diameter and 10 cm in depth. These cores were divided into 3 slices. It has been found that the content of 137Cs was the highest at the sites of the altitude over 1300 m a.s.l. The values of 137Cs concentration in the soils examined varied – from 55.8 Bqźkg–1 (dry mass) (417.8 Bqźm–2) for the Tomanowa Pass (1685 m a.s.l.) to 5111 Bqźkg–1 (dry mass) (8400 Bqźm–2) for the Krzyzne Pass (2112 m a.s.l.). In most cases, the values were lower than the average radiocaesium concentration established for Poland.
Źródło:
Nukleonika; 2010, 55, 3; 377-386
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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