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Wyszukujesz frazę "Karim, Mahmood S." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Experimental and Theoretical Investigation to Study the Molecular Structure, Electronic Properties, UV–Vis Spectra of Coumarin 102
Autorzy:
Mohi, Ali T.
Abood, Tareq H.
Hadi, Hasan A.
Karim, Mahmood S.
Mutlik, Falah A-H.
Alwan, Tariq J.
Powiązania:
https://bibliotekanauki.pl/articles/1178533.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
DFT
Ionization potential
TDDFT
electron affinity
energy gap and UV spectra
Opis:
In this work, we study the structure, electronic properties and electronic spectra of Coumarin 102 (C102) dissolved in ethanol as an experimental-theoretical investigation. The various properties of the ground and excited electronic states of coumarins 102 using density functional theory (DFT) and time-dependent density functional theory (TDDFT) was calculated by the B3LYP density functional model with 6-31G(d,p) basis set by Gaussian 09 W program. Spectral characteristics of coumarin 102 have been probed into by methods of experimental UV-visible, and quantum chemistry. The UV spectrum was measured in Ethanol. The optimized structures, total energies, electronic states (HOMO- LUMO), energy gap, ionization potentials, electron affinities, chemical potential, global hardness, softness, global electrophilictity, dipole moment and electrostatic potential was calculated. were calculated. We find good agreement between experimental data of UV spectrum and TDDFT excitation energies.
Źródło:
World Scientific News; 2017, 70, 2; 216-229
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of the etching time and current density on Capacitance-Voltage characteristics of P-type of porous silicon
Autorzy:
Hadi, Hasan A.
Abood, Tareq H.
Mohi, Ali T.
Karim, Mahmood S.
Powiązania:
https://bibliotekanauki.pl/articles/1178661.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
electrochemical etching
heterojunction
porous silicon
thin films
Opis:
In This paper, electrochemical etching teqniques was using to formation of nano crystalline porous silicon layer on p-type Si substrates. Measurement of capacitance – voltage characteristics at various etching time and current densities were used for calculated built in voltage and type of heterojunction. The built in voltage values were decreased with increasing etching time and current densities for both anisotype Al/PS/p-Si/Al heterojunction. These characteristics are interpreted by assuming the abrupt heterojunction model. The effect of different etching time and current densities on electrical properties of PS have been investigated.
Źródło:
World Scientific News; 2017, 67, 2; 149-160
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurement of Natural radioactivity in tap water samples for selected regions in Thi-Qar Governorate - Iraq
Autorzy:
Hadi, Hasan A.
Karim, Mahmood S.
Mahi, Ali T.
Abood, Tareq H.
Powiązania:
https://bibliotekanauki.pl/articles/1192660.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
(HPGe) detector
Thi-Qar governorate
tap water
specific activity
radionuclides
Opis:
In the present work, we have measured specific activity concentrations in ten tap water samples for selected regions in Thi-Qar governorate by using high purity germanium (HPGe) detector. The results have shown that, the specific activity, for 238U was ranged from (0.65±0.8 Bq/kg) in AL- Nasir region to (1.32±0.7.8 Bq/kg) in AL-Refai region, for 232Th the specific activity was ranged from (0.120±0.34 Bq/kg) in AL-Garraf region to (0.980±0.99 Bq/kg) in AL- Dwaya region, for 40K the specific activity was ranged from (13.33±3.6 Bq/kg) in AL-Nasir region to (38.54±6.2 Bq/kg) in (AL-Garraf) region, with an average values of (0.933±0.16 Bq/kg), (0.737±0.17 Bq/kg), (24.451±7.5Bq/kg), for 238U, 232Th and 40K, respectively. In order to asses the radiological hazards of the radioactivity in tap water, we have been calculated the parameters (Raeq , DƔ, AEDin , AEDout , EAD , Iɣ , Hin and Hex).
Źródło:
World Scientific News; 2016, 47, 2; 112-122
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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