Autor: Gümüş, H. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: An algorithm for the calculation of heavy ion ranges in SiO2
Autorzy:: Kabadayi, Ö.
Gümüs, H.
Powiązania:: https://bibliotekanauki.pl/articles/148433.pdf
Data publikacji:: 2003
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: ion implantation
ion range
SiO2
Opis:: The heavy ion ranges in amorphous SiO2 have been calculated by using a technique based on solution of first order ODE’s. Br, Au, Hg, Bi, projectiles have been chosen as incident ion. Since the target is assumed to be amorphous, Bragg’s rule can be used to calculate electronic and nuclear stopping powers in the compound. Numerical solutions have been performed by using Fehlberg fourth-fifth order Runge-Kutta method. The results are compared with experimental data, as well as with the result of the Monte Carlo program SRIM and other standard procedures such as PRAL and WS [19]. It is found that the agreement between our method and the experiment is good and within 10%.
Źródło:: Nukleonika; 2003, 48, 3; 145-149
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Stopping Power Calculations of Compounds by Using Thomas-Fermi-Dirac-Weizsäcker Density Functional
Autorzy:: Tufan, M.
Gűműş, H.
Powiązania:: https://bibliotekanauki.pl/articles/1812034.pdf
Data publikacji:: 2008-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 34.50.Bw
34.10.+x
Opis:: Electronic stopping power of compounds was calculated by using the Thomas-Fermi-Dirac-Weizsäcker density functional. Bragg's rule was employed to determine stopping power of compounds from the elemental stopping power results. Calculations were done for Be, B, O, and Si ions in Al₂O₃, SiO₂, and CO₂ targets by using the Thomas-Fermi-Dirac-Weizsäcker density functional. The obtained results were compared with other Thomas-Fermi based theoretical calculations and show that using Thomas-Fermi-Dirac-Weizsäcker density functional in stopping power calculations yields reasonably accurate results in especially light systems (with respect to the number of electrons in the system).
Źródło:: Acta Physica Polonica A; 2008, 114, 4; 703-711
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Electronic Energy Loss of the Partially Stripped Boron-Like and Carbon-Like Fast Ions
Autorzy:: Gümüş, H.
Özalp, C.
Köroğlu, A.
Powiązania:: https://bibliotekanauki.pl/articles/2035735.pdf
Data publikacji:: 2003-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 34.50.Bw
61.85.+p
Opis:: An analytical formula of the electronic stopping power expression in this study was derived for swift boron-like and carbon-like ions by using first-order perturbation theory and frozen-charge-state model. The Hartree- Fock-Slater determinant was used for the description of the bound electrons attached to ions in the ground state and orbital-screening parameter was determined by variational method. The calculated ground state energies in this study were compared with the results of Clementi-Roetti and they are in good agreement with 5%. It has been observed that the difference of energy loss for boron-like and carbon-like projectiles in a frozen-charge state increases as an atomic number increases. Furthermore, the analytical expression of the effective charge of boron-like and carbon-like projectiles was derived.zapisz i p
Źródło:: Acta Physica Polonica A; 2003, 103, 4; 349-363
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Stopping Power Calculations for Partially Stripped Projectiles in High Energy Region
Autorzy:: Tufan, M. Ç.
Köroğlu, A.
Gümüş, H.
Powiązania:: https://bibliotekanauki.pl/articles/2041828.pdf
Data publikacji:: 2005-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 34.50.Bw
34.10.+x
Opis:: The electronic stopping cross-section is calculated in the spirit of the Bethe theory. Interaction potential between projectile and target is regarded to have a Coulombic character and we have modified it to take into account velocity dependences on a number of bound electrons of projectile and an effective charge of projectile and target. These velocity dependences are obtained from the Bohr adiabatic criterion using the Thomas-Fermi atomic model. We have get the electronic stopping cross-section expression using the Bethe approximation; we obtained the stopping cross-section of C and Al for C, O, and Si ions from this expression and compared our results with experiment and other theoretical calculations.
Źródło:: Acta Physica Polonica A; 2005, 107, 3; 459-472
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Shielding behaviors and analysis of mechanical treatment of cements containing nanosized powders
Autorzy:: Mutuk, H.
Mutuk, T.
Gümüş, H.
Mesci Oktay, B.
Powiązania:: https://bibliotekanauki.pl/articles/1068612.pdf
Data publikacji:: 2016-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 28.41.Qb
34.50.Bw
81.05.Rm
81.70.Bt
Opis:: In this study, we investigated linear attenuation coefficient (μ ), half value layer, tenth value layer at 243, 344, 866, 1088, 1112, 1528 keV. Mechanical properties of cements containing nanosized powders (nano-SiO₂, nano-Fe₂O₃, nano-Al₂O₃) are obtained. According to compressive strength results nano-SiO₂ added cementitious material gave the highest strength. Moreover, all the nanopowders added samples showed higher compressive strength with respect to reference sample. The experimental linear mass attenuation coefficients μ , half value layer, tenth value layer for cementitious material were compared with theoretical values obtained using XCOM. The experimental results were found to be in good agreement with the theoretical values.
Źródło:: Acta Physica Polonica A; 2016, 130, 1; 172-174
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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