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Volume 11, No. 3,
2018, 1439 H
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English
Articles |
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M1 and
E2
Transitions
in the
Ground-State
Levels
of
Neutral
Tin
We have
reported
the
magnetic
dipole
(M1) and
electric
quadrupole
(E2)
transition
parameters
such as
transition
energies,
logarithmic
weighted
oscillator
strengths
and
transition
probabilities
between
the fine
structure
levels
in the
ground-state
configuration
of 5s25p2
for
neutral
tin (Sn
I, Z=50)
using
the
multiconfiguration
Hartree-Fock
approximation
within
the
framework
of the
Breit-Pauli
Hamiltonian
(MCHF+BP).
The
results
obtained
for Sn I
have
been
compared
with
other
available
results.
Also,
new
results
on
oscillator
strengths
for Sn I
have
been
presented. |
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Leyla
Özdemir
and
Muhammed
S.
Şadoğlu
JJP,
2018, 11(3)
,
141-145
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Study of
Optical
and
Structural
Properties
of NiO
Thin
Films
Prepared
by
Chemical
Spray
Pyrolysis
(CSP)
Method
In this
study,
NiO thin
films
with
molarity
of 0.1 M
have
been
successfully
deposited
on glass
substrates
by
chemical
spray
pyrolysis
(CSP)
technique
at a
substrate
temperature
of 400
oC
and a
deposited
thickness
of about
350 nm.
The
structural
and
optical
properties
of these
films
have
been
studied
using
Ultraviolet-visible
(UV-Visible)
spectroscopy
and X
ray
diffraction
(XRD).
The
absorbance
and
transmittance
spectra
have
been
recorded
in the
wavelength
range of
300-900
nm in
order to
study
the
optical
properties.
The
optical
energy
gap for
allowed
direct
electronic
transition
was
calculated
using
Tauc’s
equation.
... |
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Mutaz S.
H.
Aljuboori
JJP,
2018, 11(3)
,
147-152
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Comparison
of
Different
Models
of
Size-Dependent
Thermodynamic
Properties
of
Nanoparticles
Surface
and
thermodynamic
properties,
such as
enthalpy,
cohesive
energy,
surface
energy
and
melting
point,
of
different
materials
(Ag, Au,
Sn and
In) were
calculated
theoretically
in this
study by
using
the
following
two
models:
firstly,
the
lattice
vibration-based
model (LVB)
of
surface
atoms
and
secondly,
the
surface-to-volume
atom
ratio (SVA)
model of
the free
surface
nanoparticle
material.
In this
work,
the
melting
temperature
and
other
thermodynamic
properties
of the
modified
model of
the
nanoparticles
improved
the
calculated
curve
compared
with
that of
the
experimental
data due
to the
effect
of
lattice
volume.
... |
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Abdulrhman
Kh.
Suliman
JJP,
2018, 11(3)
,
153-160
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Compton
Scattering
of
Twisted
Light
The
variation
of
photonic
orbital
angular
momentum
in
Compton
scattering
is
analytically
analyzed.
We
determine
the
scattering
matrix
of
twisted
light
based on
the
fundamental
conservation
of
orbital
angular
momenta.
Numerical
values
for two
different
twisted
light
modes:
Laguerre-Gaussian
and
Bessel-Gaussian,
are
generated
and
illustrated.
Our
analysis
indicates
that
states
of
photonic
orbital
angular
momentum
are
highly
changeable
at wide
angle
scattering
but more
consistent
at small
angle
scattering.
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Mazen
Nairat
and
David
Voelz
JJP,
2018, 11(3)
,
161-166
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Neon
Soft
X-Ray
Yield
Optimization
from NX2
Dense
Plasma
Focus
Device
The aim
of this
research
is to
study
soft
x-ray
emission
from NX2
plasma
focus
device
with
neon
filling
gas
using
the Lee
model
code and
find the
maximum
value of
soft
x-ray
yield by
using
the
standard
parameters
of the
device
and then
find the
optimum
combination
of
pressure
and
anode
dimensions
that
gives
the
maximum
value of
soft
x-ray
yield.
Many
numerical
experiments
were
carried
out and
we
obtained
the
maximum
value of
soft
x-ray
yield (Ysxr)
of (22.6
J) at a
pressure
of (2.9
Torr) by
using
the
standard
parameters
of NX2
device.
We found
the
optimum
combination
of
pressure,
anode
length
and
anode
radius
(3 Torr,
2.1 cm
and 2
cm),
respectively,
by
reducing
the
anode
length
and
increasing
the
anode
radius.
The soft
x-ray
yield
increases
to
(26.01
J) with
a
corresponding
efficiency
of about
1.53%.
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Walid
Sahyouni
and
Alaa
Nassif
JJP,
2018, 11(3)
,
167-172
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Natural
Radioactivity
and
Associated
Radiation
Hazards
in Local
Portland
and
Pozzolanic
Cements
Used in
Jordan
Activity
concentration
of the
natural
gamma-emitting
radionuclides
(40K,
226Ra
and
232Th)
in at
least
forty
samples
of local
Portland
and
Pozzolanic
cement
types is
measured.
The
measurements
were
performed
using
gamma
spectrometric
techniques.
The
range of
the mean
specific
activity
(minimum
and
maximum
values)
due to
all the
three
radionuclides
is
found.
Radiological
hazards
of the
different
samples
are
estimated
using
five
approaches;
the
representative
level
index,
the
external
hazard
index,
the
internal
hazard
index,
the
radium
equivalent
index
and the
absorbed
dose
rate.
Some of
the
measured
radiological
hazard
parameters
are
compared
to
similar
parameters
in
different
countries.
... |
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Mefleh
S.
Hamideen
JJP,
2018, 11(3)
,
173-179
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Optical
Constants
Determination
of
Thermally-Evaporated
Undoped
Lead
Iodide
Films
from
Transmission
Spectra
Using
the PUMA
Method
0.7-μm
thick
lead
iodide
(PbI2)
films
thermally-evaporated
on glass
substrates
held at
different
temperatures
T_s
(35-195
℃) are
studied.
Typical
observed
X-ray
diffraction
(XRD)
patterns
and
scanning
electron
microscope
(SEM)
micrographs
of such
PbI2
films
prepared
at high
substrate
temperatures
T_s
(>100 ℃)
were
found to
be
crystalline
with
hexagonal
2H-polytypic
structure
with the
c-axis
perpendicular
to the
surface.
The
room-temperature
normal-incidence
transmittance
T_exp
(λ) of
the PbI2
films
has been
measured
as a
function
of
spectral
wavelength
λ in the
range
300-1100
nm and
was used
to
retrieve
the
spectral
dependence
of their
optical
constants
n(λ) and
κ(λ)
using
the
Pointwise
Unconstrained
Minimization
Approach
(PUMA)
method.
... |
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Mahmoud
H. Saleh
JJP,
2018, 11(3)
,
181-191
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Radiological
Risk
Measurements
Due to
Natural
Radioactivity
of
Building
Stones
Used in
Jordanian
Houses
The
radiological
risk
from
building
stone
interfaces
in
Jordanian
houses
was
determined
depending
on gamma
ray
spectrometric
techniques.
Building
stone
samples
collected
from
seven
types
mostly
used in
Jordanian
houses
have
been
analyzed
for the
naturally
occurring
radioactive
radionuclides.
The mean
specific
activities
of
238U,
232Th
and
40K
were
lower
than
7.63±0.08,
2.77±0.12,
32.7±2.96
Bq/kg,
respectively.
The
estimated
radium
equivalent
activity
(Raeq)
in the
stones
was
lower
than
24.84±0.470
Bq/kg
and the
external
and
indoor
hazard
indices
were
also
lower
than
unity.
... |
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H.
Saleh,
M.
Hamideen,
M. Al-Hwaiti
and
S. Al-Kharoof
JJP,
2018, 11(3)
,
193-200
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Technical
Note |
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Optical
Properties
of
Chemically
Synthesized
Cadmium
Sulphide
for
Solar
Cell
Applications
This
paper
presents
the
optical
properties
of
chemically
synthesized
cadmium
sulphide
for
solar
cell
applications.
CdS nano-particles
were
synthesized
with
chemical
route
method
using
cadmium
sulphate
as
cadmium
ion
source
and
thiourea
as
sulphide
ion
source.
The
prepared
CdS nano-particles
were
characterized
with XRD
and SEM.
Then,
the
prepared
CdS was
deposited
on well
cleaned
glass
substrate
by
thermal
evaporation
technique
to
obtain a
film of
100 nm
thickness.
The film
was
optically
characterized
with
UV-Visible
spectrophotometer
and FTIR
Spectrometer.
... |
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M. A.
SALAWU,
A. B.
ALABI,
S. B.
SHARAFA
and
T.
AKOMOLAFE
JJP,
2018, 11(3)
,
201-207
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