Papers by Tariq Al-Abdullah
Developing a PGNAA setup for heavy metal detection in solid samples
Journal of radioanalytical and nuclear chemistry, Feb 15, 2024
Single and Double Protons from the ^14O+α Interaction
APS Division of Nuclear Physics Meeting Abstracts, Oct 1, 2006
Comparison between NIS and TNC channels for the detection of nickel in soil samples
Applied Radiation and Isotopes
Bulletin of the American Physical Society, 2007
Submitted for the DNP07 Meeting of The American Physical Society Technique and study of β-delayed... more Submitted for the DNP07 Meeting of The American Physical Society Technique and study of β-delayed p-decay of proton-rich nuclei 1
Optical and radiation shielding features for a new series of borate glass samples
Optik, 2021
Abstract A series of borate glass (80-y)B2O3-10ZnO-10CdO-yBaO, where 10 ≤ y ≤ 30, was synthesized... more Abstract A series of borate glass (80-y)B2O3-10ZnO-10CdO-yBaO, where 10 ≤ y ≤ 30, was synthesized by the melt quench method. The durability and optical features were explored to study the structural features. The sample S2 appears the highest durability than other samples. Several optical parameters were determined, such as bandgap, refractive index, reflection loss, metallization, and cutoff wavelength; these parameters show a good relationship with durability. Moreover, comprehensive radiation shielding properties, including gamma, neutron, and proton, were computed theoretically. The mass attenuation coefficient (MAC)theoretical was defined by using the XCOM program, the (MAC)theoretical was compared with MCNP values, and the acquired results show excellent compatibility. The sample S5 gives the best sheilding properties for gamma and proton radiations. While, S1 sample provides the highest neutron shielding features. Finally, it can be concluded that the fabricated glass samples can be used as a shielding substance for proton, neutron, and gamma-ray.
\textbf{Extracting the ANCs for }$^{23}$\textbf{Al$\to $}$^{22}$\textbf{Mg + p from the mirror system} $^{23}$\textbf{Ne$\to $}$^{22}$\textbf{Ne + n }
Bulletin of the American Physical Society, 2005
Astroparticle Physics, 2019
The muon intensity and angular distribution in the shallow-underground laboratory Felsenkeller in... more The muon intensity and angular distribution in the shallow-underground laboratory Felsenkeller in Dresden, Germany have been studied using a portable muon detector based on the close cathode chamber design. Data has been taken at four positions in Felsenkeller tunnels VIII and IX, where a new 5 MV underground ion accelerator is being installed, and in addition at four positions in Felsenkeller tunnel IV, which hosts a low-radioactivity counting facility. At each of the eight positions studied, seven different orientations of the detector were used to compile a map of the upper hemisphere with 0.85 • angular resolution. The muon intensity is found to be suppressed by a factor of 40 due to the 45 m thick rock overburden, corresponding to 140 meters water equivalent. The angular data are matched by two different simulations taking into account the known geodetic features of the terrain: First, simply by determining the cutoff energy using the projected slant depth in rock and the known muon energy spectrum, and second, in a Geant4 simulation propagating the muons through a column of rock equal to the known slant depth. The present data are instrumental for studying muon-induced effects at these depths and also in the planning of an active veto for accelerator-based underground nuclear astrophysics experiments.
Sulfur analysis in bulk samples using a DD portable neutron generator based PGNAA setup
Journal of Radioanalytical and Nuclear Chemistry, 2020
Prompt gamma ray analysis of sulfur-contaminated soil samples was carried out using a Genie 16 DD... more Prompt gamma ray analysis of sulfur-contaminated soil samples was carried out using a Genie 16 DD portable neutron generator and a 12.7 cm × 12.7 cm (diameter × height) BGO detector. The minimum detectable concentration MDC ± $$\sigma_{\text{MDC}}$$ σ MDC was measured from soil samples containing 4.4, 7.1, 9.6, and 13.47 wt% sulfur using the 5.42 MeV sulfur capture gamma rays. The measured value of MDC ± $$\sigma_{\text{MDC}}$$ σ MDC for sulfur, which was 1.30 ± 0.40 wt%, is in good agreement with the corresponding values reported earlier with intense 252 Cf source-based PGNAA setups.
Applied sciences, Apr 7, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Particle decay from the states of ^18Ne^* in the ^14O+α interaction
APS, Apr 1, 2007
The ^22Ne(p,γ)^23Na reaction is included in the neon-sodium cycle of hydrogen burning. A number o... more The ^22Ne(p,γ)^23Na reaction is included in the neon-sodium cycle of hydrogen burning. A number of narrow resonances in the Gamow window dominates the thermonuclear reaction rate. Several resonance strengths are only poorly known. As a result, the ^22Ne(p,γ)^23Na thermonuclear reaction rate is the most uncertain rate of the cycle. Here, a new experimental study of the strengths of the resonances at 436, 479, 639, 661, and 1279 keV proton beam energy is reported. The data have been obtained using a tantalum target implanted with ^22Ne. The strengths ωγ of the resonances at 436, 639, and 661 keV have been determined with a relative approach, using the 479 and 1279 keV resonances for normalization. Subsequently, the ratio of resonance strengths of the 479 and 1279 keV resonances was determined, improving the precision of these two standards. The new data are consistent with, but more precise than, the literature with the exception of the resonance at 661 keV, which is found to be less ...
Comparison between NIS and TNC for the Detection of Nickel in Soil Samples Using a Portable Neutron Generator
SSRN Electronic Journal, 2021
Federico Ferraro∗,a,b, Francesca Cavannaa,b, Rosanna Depaloc,d , Alessandra Slemerc,d , Tariq Al-... more Federico Ferraro∗,a,b, Francesca Cavannaa,b, Rosanna Depaloc,d , Alessandra Slemerc,d , Tariq Al-Abdullahe,g, Michael Anderse, f , Daniel Bemmerere, Zoltán Elekese, Stefan Reinickee, f , Louis Wagnere, f . aDipartimento di Fisica, Università degli Studi di Genova, Genova, Italy bINFN, Sezione di Genova, Genova, Italy cDipartimento di Fisica, Università degli Studi di Padova, Padova, Italy dINFN, Sezione di Padova, Padova, Italy eHelmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany f Technische Universität Dresden, Dresden, Germany gHashemite University, Zarqa, Jordan
Journal of Physics: Conference Series, 2018
The gamma-ray lines from the decay of 44 Ti have been observed by space-based gamma-ray telescope... more The gamma-ray lines from the decay of 44 Ti have been observed by space-based gamma-ray telescopes from two supernova remnants. It is believed that the 44 Ti(α,p) 47 V reaction dominates the destruction of 44 Ti. This work presents a possible technique to determine its reaction rate in forward kinematics at astrophysically relevant energies. Several online and offline measurements in parallel with Monte Carlo simulations were performed to illustrate the feasibility of performing this reaction. The results will be discussed.
Analytical Expressions for the Mixed-Order Kinetics Parameters of TL Glow Peaks Based on the two Heating Rates Method
Journal of Fluorescence, 2018
The two heating rates method (originally developed for first-order glow peaks) was used for the f... more The two heating rates method (originally developed for first-order glow peaks) was used for the first time to evaluate the activation energy (E) from glow peaks obeying mixed-order (MO) kinetics. The derived expression for E has an insignificant additional term (on the scale of a few meV) when compared with the first-order case. Hence, the original expression for E using the two heating rates method can be used with excellent accuracy in the case of MO glow peaks. In addition, we derived a simple analytical expression for the MO parameter. The present procedure has the advantage that the MO parameter can now be evaluated using analytical expression instead of using the graphical representation between the geometrical factor and the MO parameter as given by the existing peak shape methods. The applicability of the derived expressions for real samples was demonstrated for the glow curve of Li2B4O7:Mn single crystal. The obtained parameters compare very well with those obtained by glow curve fitting and with the available published data.
Recent Applications of the THM to the AGB Star Nucleosynthesis
AIP Conference Proceedings, 2008
ABSTRACT The THM has been applied to the study of reactions involved in the fluorine production i... more ABSTRACT The THM has been applied to the study of reactions involved in the fluorine production in AGB stars with the aim of extending these measurements down to the Gamow peak. Fluorine abundance is important since it allows to constrain mixing models from the comparison of the observed fluorine abundances with the ones predicted by models. In particular the study focuses on the N-15(p, a) C-12 and the O-18(p, a) N-15 reactions which can influence fluorine yield as they are part of F-19 production (and destruction) network.
AIP Conference Proceedings, 2008
The direct and resonant capture rate contributions to the 22 Mg(p,γ) 23 Al reaction.
Proceedings of XIII Nuclei in the Cosmos — PoS(NIC XIII), 2015
The 22 Ne(p, γ) 23 Na reaction is part of the NeNa cycle of hydrogen burning. This cycle plays a ... more The 22 Ne(p, γ) 23 Na reaction is part of the NeNa cycle of hydrogen burning. This cycle plays a key role in the nucleosynthesis of the elements between 20 Ne and 27 Al in red giant stars, asymptotic giant stars and classical nova explosions. The strengths of the resonances at proton energies above 400 keV are still affected by high uncertainty.In order to reduce this uncertainty, a precision study of the most intense resonances between 400 keV and 700 keV has been performed at the HZDR 3 MV Tandetron. The target, made of 22 Ne implanted in a 0.22 mm thick Ta backing, has been characterized using the 1222 keV and 458 keV resonances, well known in literature.Subsequently, the strengths of the resonances at 417, 611, and 632 keV were determined. Two HPGe detectors equipped with active anti-Compton shielding have been used. The uncertainty on the measured resonance strengths has been significantly lowered compared with previous values.
Chemical Physics, 2017
Binary mixture monolayers of Myristic acid (MA) with the same length of saturated acyl chain lipi... more Binary mixture monolayers of Myristic acid (MA) with the same length of saturated acyl chain lipid viz 1,2-myristoyl-sn-glycero-3-phosphocholine (DMPC) and Cholesterol (Chol), were investigated under different experimental conditions using Langmuir monolayers (LMs). The interfacial pressure-area (p-A) isotherms, excess molecular area, excess free energy and fluorescence microscopy (FM) images were recorded at the air/water interface. Monolayers of both systems (e.g. MA/DMPC, MA/Chol) reach the closest acyl hydrophobic chain packing in the range 0.20 < x MA < 0.70. Thermodynamic analysis indicates miscibility of the binary mixtures when spread at the air/water interface with negative deviation from the ideal behavior. Morphological features of MA/DMPC systems were found to depend strongly on MA mole fraction and pressures by showing two extreme minima in Gibbs free energy of mixing, while MA/Chol systems showed only an effective condensing effect at x MA = 0.90. In the whole range of compositions studied here, the liquid-expanded (LE) to liquid-condensed (LC) phase transition occurs at increasing x AM as it accomplished by a huge increase in the inverse compressibility modulus. FM observations confirmed the phase-transition and condensing effects of both mixture monolayers as evidenced by Gibbs free energy of mixing in a limited range of compositions.
Physical Review C, 2016
The dipole strength distribution of 80 Se was studied in a photon-scattering experiment by using ... more The dipole strength distribution of 80 Se was studied in a photon-scattering experiment by using bremsstrahlung produced with an electron beam of energy 11.5 MeV at the linear accelerator ELBE. We identified 180 γ transitions up to an energy of 9.6 MeV, and analyzed the strength in the quasicontinuum of the spectrum. Simulations of statistical γ -ray cascades were performed to estimate intensities of inelastic transitions and to correct the intensities of the ground-state transitions for their branching ratios. The photoabsorption cross section below the neutron-separation energy derived in this way was combined with the photoabsorption cross section obtained from an earlier (γ,n) experiment and used as an input for the calculation of 79 Se(n,γ ) reaction rates on the basis of the statistical reaction model.
Uploads
Papers by Tariq Al-Abdullah