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Wyszukujesz frazę "Fathollahi, H." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Bone powder as EPR dosimetry system for electron and gamma radiation
Autorzy:
Ziaie, F.
Hajiloo, N.
Fathollahi, H.
Mehtieva, S. I.
Powiązania:
https://bibliotekanauki.pl/articles/148156.pdf
Data publikacji:
2009
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
bone powder dosimeter
EPR response
dose rate
electron beam
gamma ray
Opis:
In this work bovine bone powder samples were irradiated at three different dose rates of 100, 260 and 630 kGy/min for the absorbed dose range of 3 to 110 kGy, using 10 MeV electron beam radiation. The samples were subjected to EPR measurement at room temperature in air. The variation of EPR signal intensities were constructed and evaluated base on quantitative data related to the absorbed doses. Moreover, they were compared with the obtained results from the samples irradiated by a 60Co gamma-ray source with a dose rate of 2.65 kGy/h. The time and temperature effects on the EPR response of this dosimeter were also studied. The results indicated that the bone sample was a suitable dosimeter especially for electron beam at high doses.
Źródło:
Nukleonika; 2009, 54, 4; 267-270
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ion Beam Analysis of Hydrogen-Treated Ti/TiN Protective Nanomultilayers
Autorzy:
Kakuee, O.
Fathollahi, V.
Lamehi-Rachti, M.
Oliaiy, P.
Seyedi, H.
Safa, S.
Mojtahedzadeh Larijani, M.
Moazzami, H.
Powiązania:
https://bibliotekanauki.pl/articles/1419781.pdf
Data publikacji:
2012-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.43.-h
68.49.-h
81.15.Jj
25.45.-z
Opis:
Ti/TiN multilayer films with a few multilayer periods and a total sub-μm thickness were deposited on AISI 304 stainless steel substrates by ion coating deposition technique. To investigate the effect of hydrogen treatment on the corrosion behavior of the multilayers, some of the samples were hydrogen treated after deposition of the first and/or the second Ti interlayer. $\text{}^{14}N(d,\alpha_1) \text{}^{12}C$ nuclear reaction and the Rutherford backscattering spectrometry were used to obtain the atomic composition profiles and thickness of Ti/TiN layers. Nuclear reaction analysis confirmed the presence of two separable TiN layers of comparable thickness on the surface and in depth of the two-period multilayers. These techniques were used to determine the thickness of individual Ti and TiN layers and revealed that the stoichiometry of TiN layers was approximately Ti:N=1:1. Hydrogen depth profile in the prepared samples was obtained by elastic recoil detection analysis. It was found that a remarkable volume of hydrogen was uptaken by the Ti layer in the hydrogen treated samples. The TiN (200) diffraction peak in the X-ray diffraction pattern was observed with different intensities depending on the sample preparation parameters. The corrosion behavior of the multilayers was studied by means of potentiodynamic polarization in 0.5 M NaCl solutions. It was found that the hydrogen treatment of Ti interlayer could potentially improve the corrosion properties of the Ti/TiN layers.
Źródło:
Acta Physica Polonica A; 2012, 122, 1; 132-137
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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