Subhi Salih

Subhi Salih
An-Najah National University · Department of Physics

Ph.D./ATOMIC PHYSICS

About

24
Publications
1,063
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466
Citations

Publications

Publications (24)
Conference Paper
In earlier studies, we demonstrated new simple techniques to modify characteristics of monolithic semiconductor electrodes (such as n-Si and n-GaAs) in light-to-electricity conversions. A combination of two methods, namely: cooling rate and coverage with electro-active ions (embedded inside polymer matrices) simultaneously enhanced both conversion...
Conference Paper
2nd International Conference on Energy and Environmental Protection in Sustainable Development (ICEEP' 2009) Palestine Polytechnic University Hebron, Palestine, November 10-12, 2009 Preparation, characterization, modification and application of thin-film cadmium chalcogenide semiconductors: enhancement of solar conversion efficiency and stability...
Article
The purpose of this study was to investigate the effect of proposed learning program teaching basic Basketball skills of male physical education majors at (ANU). The sample of the study was consisted of (48) students, and they were divided equally for two groups first one as experimental group and the other as control group. The results reveled a p...
Article
Full-text available
The effect of annealing of n-GaAs semiconductor on its characteristics in photoelectrochemical (PEC) systems has been investigated. The photocurrent densities vs. potential plots were improved by annealing. Cell efficiency and short-circuit current densities were enhanced for the annealed n-GaAs. The effect of rate of cooling of heated n-GaAs wafer...
Article
Full-text available
December 2003, Vol. 26, No. 4, pp. 213–230 The effect of annealing of the n-Si semiconductor on its characteristics in photoelectrochemical systems has been investigated. The annealing improved the dark current density vs. potential plots. The surface was improved by annealing, as manifested by SEM results. The effect of the cooling rate on prehea...
Article
Full-text available
A derivation of the specific electrostatic energy loss for two interacting capacitors is given. The connecting wires are assumed to be superconducting. The method of derivation is based purely on the Poynting vector involved in the process without any reference to the nature of the mechanism that may be involved in achieving a final equilibrium sta...
Article
Atomic transition probabilities for 376 spectral lines of neutral thulium and for 146 spectral lines of singly ionized thulium are reported. Branching fractions, measured with the 1.0-m Fourier-transform spectrometer at the National Solar Observatory on Kitt Peak, Tucson, Arizona, are combined with recently published radiative lifetimes, measured w...
Article
Preferential Solvation of bis-(2,2′-bipyridyl) biscyanoiron(II) was investigated in 2-ethoxy ethanol water binary aqueous mixtures. The treatment showed that preferential solvation by 2-ethoxy ethanol occurs. The preferential solvation constant at 298.15° K was found to be equal to (4.96 ± 0.06) and the free energy of preferential solvations ΔG has...
Article
Radiative lifetimes for more than 160 levels in Ti I are reported. These accurate lifetimes (+ or -5 percent) are measured using time-resolved laser-induced fluorescence on a titanium atomic beam. These lifetimes confirm the recent renormalization of the Oxford Ti I oscillator strengths, confirm the revision of the solar abundance of titanium, and...
Article
The use of time-resolved laser-induced fluorescence to measure the radiative lifetimes for 12 levels in Ni II is examined. The equipment and procedures for measuring the lifetimes are described, and a table of the lifetimes observed is presented. The radiative lifetimes were combined with branching ratios in order to obtain accurate transition prob...
Chapter
Optogalvanic effects are changes in the conductance of a gas discharge caused by illumination with radiation at a wavelength corresponding to an atomic or molecular transition. These phenomena were first discovered by Penning over fifty years ago, and were rediscovered a number of times in the intervening decades (Penning, 1928). Early work on opto...
Article
The radiative lifetime of 14 levels in the z^5F, z^5D, and z^5G terms of Co ii have been measured with use of time-resolved laser fluorescence spectroscopy with a Co+-ion beam. Our lifetime values are shorter by 15–50 % than earlier results from beam-foil time-of-flight measurements. The lifetimes were converted to 41 individual transition probabil...
Article
Radiative lifetimes for 50 odd-parity levels in Ru I are determined using time-resolved laser-induced fluorescence on a Ru atomic beam. The implication of the lifetime measurements for the Ru abundance in red giant stars with an enhanced heavy-element abundance is discussed.
Article
Electric fields in the cathode fall region of a glow discharge are accurately measured in a small volume defined by the intersection of two laser beams. The fields are determined from linear Stark effects in Rydberg levels. The Rydberg atoms are produced via a two-step laser excitation and detected with optogalvanic effects.
Article
A novel pulsed ion source suitable for laser spectroscopy on any metallic element is described. The source is based on a large-bore low-pressure hollow-cathode discharge. The first direct radiative lifetime measurements in Nb II are reported. Radiative lifetimes for z5G and z3D levels of Nb II are determined using time-resolved laser-induced fluore...
Article
Radiative lifetimes of 22 levels in Rh I and of 35 levels in Ta I are reported. The lifetimes are measured with the use of time-resolved laser-induced fluorescence on an atomic beam. The Rh I lifetimes resolve the discrepancy between the spectroscopically determined solar abundance of Rh and the abundance of Rh determined from chondritic meteorites...
Article
Radiative lifetimes of nine levels of neutral rhenium are reported with an accuracy of + or - 5%. Improved oscillator strengths derived from the lifetimes bring the spectroscopically determined upper limit for the solar abundance of Re closer to the abundance of Re in chondritic meteorites.
Article
Radiative lifetimes of 25 levels in neutral hafnium are reported. Measurements are made on a sputtered atomic beam through the use of time-resolved laser-induced fluorescence. The system is shown to be useful for lifetimes from a few nsec to over 2 musec.
Article
Radiative lifetimes of 11 levels from the z3G, y5G, and y3G terms of Zr I are reported. These lifetimes are measured using time-resolved laser-induced fluorescence on a Zr atomic beam.
Article
The first direct radiative lifetime measurements in W I are described. Radiative lifetimes of 15 levels from the $5{d}^{4}6s(a^{6}D)6p(z^{7}D^{0})$, $5{d}^{4}6s(a^{6}D)6p(z^{5}F^{0})$, $5{d}^{5}(a^{6}S)6p(z^{7}P^{0})$,, and $5{d}^{4}6s(a^{6}D)6p(z^{5}P^{0})$ terms are reported with an accuracy of \ifmmode\pm\else\textpm\fi{}5%. The lifetimes are me...
Article
Radiative lifetimes of the 4d5 (a6S)5pz 7Po levels and the 4d5 (a6S)5pz5Po levels in MoI are reported as follows: tau(z 7P4O) = 15.9 ns, tau(z 7P3O) = 17.0 ns, tau(z 7P2O) = 17.1 ns, tau(z 5P3O) = 22.3 ns, tau(z 5P2O) = 22.1 ns, and tau(z 5P1O) = 21.7 ns (+/-5%). The lifetimes are measured using time resolved laser induced fluorescence and a novel...
Article
It is first argued that nuclear energy calculations with a density-dependent force may be carried out in a basis which is not self-consistent. The underlying formalism is outlined and the rearrangement energy is shown to be due, in this approach, to the survival of an unlinked diagram which would be cancelled in the absence of density dependence. T...

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