Journal of Basrah Researches (Sciences)

The structure of 70Ni nucleus is studied by using Particle-Vibration Coupling Model (PVCM), which
separates the nucleus into three systems, vibrating core and two interacting neutrons. The vibration of the
core is represented by single quadrupole phonon, and the two neutrons are assumed to occupy the state
1g9/2 and interacted by MSDI. A very well reproduction for the positive parity states of 70Ni is obtained by
applying the PVCM. The core polarization effect that includes particle-hole excitation from the proton
states of the core, to the states outside the model space with 2ℏω, is very necessary to reproduce the
reduced E2 transition probability

The mechanical properties and average time of burning of composite were
made from low density polyethylene with different wt% of Rockwool fibers
(1, 2.5, 5, 7.5, 10)% w/w and found that the best ration of composites 7.5%.
The elastic deformation properties of samples were evaluated by Loaded-
elongation measurement. The stress - strain results found that the elastic
properties decrease with increasing of Rockwool fibers, while 10% is the best
ratio that achieved best average time of Burning (ATB).

Regioregularpoly(3-hexylthiophene)(P3HT):[6,6]-phenylC61-
butyricacidmethylester (PCBM) active layer were found to significantly increase
organic solar cell performance. photovoltaic devices with three solvents, Toluene (T),
Xylene (X), and co-solvent Toluene:Xylene (T:X) were fabricated. The physical
properties of these devices with different solvents are investigated. In this paper, we
find that, absorption spectrum of the blend becomes more broad with different
solvents, which is highly desirable for photovoltaic devices. Films morphology is
evaluated by Atomic Force Microscopy (AFM). X-Ray diffraction (XRD) samples
and External Quantum Efficiency (EQE) measurements are also performed for the
active layers. The Power Conversion Efficiency (PCE) enhancement for the device
with (T:X) is more significant than for other solvents. With different solvents, the
solar cells upon (T:X) give (PCE) of 0.176%, in contrast to 0.144% for (T), and
0.079% for (X), devices.

Quantitative structure-activity relationships (QSAR) of 16 thiazole derivatives
against five types of bacteria, namely: Klebsiella pneumoniae, Staphylococcus aereus,
Escherichia coli, Bacillus substilis and Pseudomonas areginosa, was carried out. Physio-
chemical parameters were obtained computationally by optimization of chemical structures
at minimum energy using molecular mechanics (MM+) theory and the semi-empirical
molecular orbital (AM1) method. Then, multiple linear regression (MLR) analysis used to
correlate changes in chemical structure and experimental antibacterial activity. Moreover, it
is found that some descriptors are in strong dependences to provide good information and
play important roles to evaluate antibacterial activity of thiazole derivatives. Results, 20
equations were found statistically with correlation coefficient rang (0.806-0.955). In
addition, within the current QSAR study, the quality of the discriminant models was
determined on the basis of correlation coefficient (R2), Fisher ratio (F), and standard error
(S). Consequently, five good models with high correlation coefficient (R2>0.9) were
nominated as valuable theoretical base to improve 15 other subset predicted structures of
amino acids conjugated 2-amnio-arylthiazole demonstrating anti-bacterial activity, and most
of them showed good antibacterial activities against positive gram of bacteria.

Radium concentration CRa varies from (0.141 - 0.721 Bq/kg) with an average value (0.344 Bq/kg). The radon exhalation
rate in terms of area EA varies from (10.17 - 52.07 mBq/m2.h) with an average value (24.82 mBq/m2.h). The radon exhalation rate
in terms of mass EM varies from (1.07 - 5.45 mBq/kg.h) with an average value (2.60 mBq/kg.h). The results are compared with
other studies.

In this paper, we study the simultaneous approximation by Szὰsz-Kantorovich type
operators. We prove that these operators are converged to the function being approximated.
Also, we discuss a Voronovaskaja-type asymptotic formula in simultaneous approximation
for these operators.

In this paper we find the modular
characters of the covering group ̅
modulo p=7 which can give the irreducible
modular spin characters for modulo
p=7, also we give the decomposition
matrix of ̅

In the present paper, we are interested in the study of the concept T, f  generalized
condition B and combined with the concept of partial metric space and prove some
common fixed point results in such a space. Our results generalize, extend and unify many
results. Example is given showing the validly of our results.

The structure of positive parity states in 141-147La isotopes has been investigated using the
interacting boson fermion model (IBFM-2). The 140-146Ba nuclei have been used as the
cores. The seven protons beyond Z = 50 closed shell are allowed to occupy the
1g7/2, 2d5/2, 2d3/2, 3s1/2 and 1h11/2 single particle orbitals. The study of the influence of the
boson-fermion interaction parameters on the energy states has been undertaken. The
reduced transition probabilities and branch ratios of these nuclei have been calculated
and compared with the available experimental data

The optical properties of solid state nuclear track detectors (LR115) films are
studied. The detectors (LR115) films have been irradiated with Alpha particles of
different energy ( Eα= 1, 2, 3, 4, 5 MeV). The optical properties are studied (for
pristine and irradiated films) by using measurements from ultraviolet-visible
(UV/VIS) spectrophotometer at wavelengths within the range (600-1000 nm). The
optical results show that the absorption of (LR115) films are increased with increase
irradiation (energy of alpha particles). The optical constants are calculated before and
after irradiation. Also the values of the optical energy band gaps for (LR115) films,
whichwas non-irradiated with direct and indirect influence, has been found (2.145,
1.89 eV) respectively. Whereas the values of direct and indirect optical energy gaps
after irradiated with α-particles (2.02, 1.75eV) respectively.
From these results, we can reveal that the values of energy band gaps in a direct-
coincidence before and after irradiation are greater than that for indirect one.