نتایج جستجو برای: srim code

تعداد نتایج: 167967  

Background & Aim: PET is a very useful and suitable imaging method in nuclear medicine. This method uses positrons with a special energy for imaging. The elements of the lanthanide are suitable for the decay of positrons with a specific energy for use in PET. Praseodymium-139 with a half-life of 4.5 hours is one of the useful elements in the group of lanthanides that can be used in PET. In this...

Journal: :iranian journal of science and technology (sciences) 2009
k. hadad

in this study, a general theoretical model to foresee and calculate the current-voltagecharacteristics in a plateau zone and the associated efficiency of the neutron detector (sensitivity) is presented. this study is to complete the previous studies in this field. the model also considers electric field distortion resulting from the charge collection effect. the characteristics curve is obtaine...

Journal: :Scanning 2012
Donald Winston J Ferrera L Battistella A E Vladár K K Berggren

We present here a hybrid approach to modeling helium-ion lithography that combines the power and ease-of-use of the Stopping and Range of Ions in Matter (SRIM) software with the results of recent work simulating secondary electron (SE) yield in helium-ion microscopy. This approach traces along SRIM-produced helium-ion trajectories, generating and simulating trajectories for SEs using a Monte Ca...

Journal: :Seikei-Kakou 1990

2016
Chenliang Ding Jingsong Wei

The resolution of far-field optical imaging is required to improve beyond the Abbe limit to the subdiffraction or even the nanoscale. In this work, inspired by scanning electronic microscopy (SEM) imaging, in which carbon (or Au) thin films are usually required to be coated on the sample surface before imaging to remove the charging effect while imaging by electrons. We propose a saturation-abs...

2014
A. M. Abdelraheem M. M. Abdelrahman

The manuscript reports a study of Kr ion implantation in a Zn target in the 10-50 keV energy range at different source parameters, which combines experimental data and simulation with the SRIM package. The implanted thickness for the 45 keV was found to be 10 μm. The ion penetration depths for different films at different energies (10-50 keV) were calculated using SRIM computer program and foun...

Journal: :Frontiers in Physics 2022

Structural properties of materials irradiated with gamma-rays, such as mechanical and physical properties, may be modified or reduced depending on the displacement damages. Apart from increasing decreasing that property, damage desirable not. This study investigates effects sterilization by gamma radiation polycaprolactone (PCL) scaffolds. Using a code-based simulation method, MCNPX provides in...

2003
M. D. Gray M. G. Edmunds

We have applied the SRIM computer code to study the sputtering of some likely astrophysical grain materials, and we have shown that selective embedding of metallic projectiles offers a partial explanation of gas-phase depletions. We show that supernova shockwaves sweep a significantly larger mass of interstellar gas per unit time than the shockwaves generated by outflows in star-forming regions...

Journal: :iranian journal of radiation research 0
m. mirzaii agricultural, medical & industrial research school, p.o. box: 31485/498, karaj, iran m. sadeghi agricultural, medical & industrial research school, p.o. box: 31485/498, karaj, iran z. gholamzadeh faculty of engineering, research and science campus, islamic azad university, tehran, iran

background: solid targets that consist of powder and electrodeposited targets are used commonly to produce radionuclides by accelerators. since silver is easily electrodeposited in cyanide baths and has a very excellent thermal conductivity, the electrodeposited target is preferable to produce 109cd. to avoid cracking or peeling of the target during bombardment, it should have a level surface a...

2016
D. Nikezic Mehrdad Shahmohammadi Beni D. Krstic K. N. Yu

Monte Carlo method has been used to determine the efficiency for proton production and to study the energy and angular distributions of the generated protons. The ENDF library of cross sections is used to simulate the interactions between the neutrons and the atoms in a polyethylene (PE) layer, while the ranges of protons with different energies in PE are determined using the Stopping and Range...

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