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Jaleh B.,Bu - Ali Sina University | Nasri A.,Bu - Ali Sina University | Kakuee O.,Physics and Accelerators Research School
Superlattices and Microstructures | Year: 2015

Abstract Bi/Tl multilayer nanowires have been successfully fabricated using template-based electordeposition by polycarbonate nanoporous template with 100 nm diameter. The growth Bi/Tl multilayer nanowires was performed using dual-bath system containing Bi and Tl salt, respectively. The electrochemical reduction of ions was explored by cyclic voltammetry (CV). The deposition process was controlled with current-time profiles. X-ray diffraction pattern (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were employed for characterization of crystalline structure and morphology of nanowires. The XRD spectra showed that the lattice structure of Bi segment is rhombohedral and thallium segment has hexagonal lattice structure. The average nanowires diameter was determined from TEM images. Elemental analysis of nanowires was carried out using energy dispersive X-ray (EDX), Rutherford backscattering spectrometry (RBS), and proton induced X-ray emission (PIXE). The length of nanowires was determined by RBS technique. Elemental concentration and weight percent of sample were measured by PIXE analysis. © 2015 Elsevier Ltd. Source


Jokar A.,Physics and Accelerators Research School | Kakuee O.,Physics and Accelerators Research School | Lamehi-Rachti M.,Physics and Accelerators Research School | Sharifzadeh N.,Payame Noor University | Fathollahi V.,Physics and Accelerators Research School
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | Year: 2015

In this work measurement of differential cross sections of 27Al(p,p/γ)27Al (Eγ = 844, 1014 keV) and 27Al(p,αγ)24Mg (Eγ = 1369 keV) nuclear reactions in the proton energy range of 1.6-3.0 MeV are described and the measured values are presented. Thin Al target was prepared by evaporating a 26 μg/cm2 Al onto a 129 μg/cm2 self-supporting Ag film. The gamma-rays and backscattered protons were detected simultaneously. The gamma-rays and protons were collected by an HPGe detector placed at an angle of 90° with respect to beam direction and an ion implanted Si detector placed at a scattering angle of 165°, respectively. In this experimental setup the great advantage is that differential cross sections could be independent on absolute values of the collected beam charge. The overall systematic uncertainty of cross sections was estimated to be ±9% while statistical errors were less than ±5%. © 2015 Published by Elsevier B.V. Source


Jokar A.,Physics and Accelerators Research School | Kakuee O.,Physics and Accelerators Research School | Lamehi-Rachti M.,Physics and Accelerators Research School
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | Year: 2016

In this research work, measured differential cross sections for gamma-ray emission from the nuclear reactions 35Cl(d,pγ1-0)36Cl (Eγ = 788 keV), 35Cl(d,pγ2-0)36Cl (Eγ = 1165 keV), 37Cl(d,pγ1-0)38Cl (Eγ = 671 keV) and 37Cl(d,pγ2-0)38Cl (Eγ = 755 keV) are presented. For these measurements a thin natural BaCl2 target evaporated onto a 50 μm-thick Mo foil was used. The gamma-rays and backscattered deuterons were detected simultaneously. An HPGe detector placed at an angle of 90° with respect to the beam direction was employed to collect gamma-rays while an ion implanted Si detector placed at a scattering angle of 165° was used to detect backscattered deuterons. The validity of the obtained differential cross sections was verified through a thick target benchmarking experiment. The overall systematic uncertainty of cross section values was estimated to be ±10%. © 2016 Elsevier B.V. All rights reserved. Source


Jokar A.,Physics and Accelerators Research School | Kakuee O.,Physics and Accelerators Research School | Lamehi-Rachti M.,Physics and Accelerators Research School
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | Year: 2016

Differential cross sections for gamma-ray emission from the 28Si(p,p/γ)28Si (Eγ = 1779 keV) and the 29Si(p,p/γ)29Si (Eγ = 1273 keV) nuclear reactions were measured in the energy range of 2.0-3.2 MeV and 2.0-3.0 MeV, respectively. The thin Si targets were prepared by evaporating natural SiO onto self-supporting Ag films. The gamma-rays and backscattered protons were detected simultaneously. An HPGe detector placed at an angle of 90° with respect to beam direction was employed to collect gamma-rays while an ion implanted Si detector placed at a scattering angle of 165° was used to detect backscattered protons. The great advantage of this work is that differential cross sections were obtained with a procedure irrespective of absolute value of the collected beam charge. © 2015 Elsevier B.V. All rights reserved. Source


Rafi-Kheiri H.,Physics and Accelerators Research School | Kakuee O.,Physics and Accelerators Research School | Lamehi-Rachti M.,Physics and Accelerators Research School
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | Year: 2016

Nuclear Reaction Analysis (NRA) and more specifically d-NRA is a suitable technique for 16O detection on or near surface of a compound containing heavy elements. The main problem of d-NRA is the limited number of NRA differential cross section data sets and their differences. The differential cross sections of 16O(d,p0,1) reactions were measured in the present work for Ed,lab = 700-1800 keV, at four scattering angles, namely at 90°, 135°, 150° and 165° which are suitable for NRA. Differential cross sections were collected with an energy step of ∼10 keV. However, detailed measurements were carried out with an energy step of ∼2 keV around resonances. The results are compared with previous studies and the similarities and differences are discussed. © 2015 Elsevier B.V. All rights reserved. Source

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