scholarly journals Stopping power and range calculations of protons in human tissues

2020 ◽  
Vol 17 (4) ◽  
pp. 1223
Author(s):  
Iftekhar Ahmed ◽  
Hridita Nowrin ◽  
Hriday Dhar
Keyword(s):  
Cortical Bone ◽  
Approximation Method ◽  
Stopping Power ◽  
Human Tissues ◽  
Slowing Down ◽  
Blood Brain ◽  
Hard Tissues ◽  
Simple Integration

In this research, the stopping power and range of protons in biological human soft and hard tissues (blood, brain, skeleton-cortical bone, and skin) of both child and adult are calculated at the energies ranging from 1MeV to 350 MeV. The data is collected from ICRU Report 46 and calculated the stopping power employing the Bethe formula. Moreover, the simple integration (continuous slowing down approximation) method is employed for calculating protons range at the target. Then, the stopping power and range of protons value in human tissues have been compared with the program called SRIM. Moreover, the results of the stopping power vs energy and the range vs energy have been presented graphically. Proper agreement is found between the gained and the SRIM results and varies almost linearly with energy up to 250 MeV.

scholarly journals Stopping power of a helium plasma under LTE or NLTE conditions

2018 ◽  
Vol 36 (4) ◽  
pp. 442-447
Author(s):  
Luis González-Gallego ◽  
Manuel D. Barriga-Carrasco ◽  
Juan Miguel Gil ◽  
Rafael Rodríguez ◽  
Guadalupe Espinosa
Keyword(s):  
Theoretical Model ◽  
Electron Temperature ◽  
Thermal Equilibrium ◽  
Stopping Power ◽  
Local Thermal Equilibrium ◽  
Helium Plasma ◽  
Slowing Down ◽  
Non Local ◽  
Argon Ions ◽  
Bound Electrons

AbstractIn this work, the stopping power of a partially ionized helium plasma due to its free and bound electrons is analyzed for an electron temperature and density in which local thermal equilibrium (LTE) or non-local thermal equilibrium (NLTE) regimes can be possible. In particular by means of collisional-radiative models, the average ionization of the plasma as well as the abundances of different helium species (HeI, HeII, and HeIII) are analyzed in both LTE and NLTE thermodynamic states. The influence of this ionization and of the different ion abundances on the stopping power of the helium plasma is shown to be quite significant. Finally, our theoretical model is compared with experimental results on slowing down of swift argon ions in helium plasma.

Slowing down of heavy ions in solids near the stopping power maximum

1991 ◽  
Vol 56-57 ◽  
pp. 355-357 ◽  
Author(s):  
A. Abdesselam ◽  
J.P. Stoquert ◽  
G. Guillaume ◽  
M. Hage-Ali ◽  
J.J. Grob ◽  
...  
Keyword(s):  
Heavy Ions ◽  
Stopping Power ◽  
Slowing Down

RANGE AND STOPPING POWER ENERGY RELATIONSHIPS FOR 0.5–30 keV ELECTRON BEAMS SLOWING DOWN IN SOLIDS: ANALYTICAL MODEL

2013 ◽  
Vol 28 (01) ◽  
pp. 1450006 ◽  
Author(s):  
A. BENTABET
Keyword(s):  
Analytical Model ◽  
Electron Beams ◽  
Geometric Model ◽  
Mathematical Expression ◽  
Low Energy ◽  
Stopping Power ◽  
Slowing Down ◽  
Energy Relationships ◽  
Slight Discrepancy ◽  
Good Agreement

The development of an analytical model for calculating the electron stopping power (SP) converging with the experimental data at lower energies is still not completed. The purpose of this work is to suggest a mathematical expression of the range and the stopping power of electrons impinging in solid targets in the energy range up to 30 keV based on the spherical geometric model [A. Bentabet, Vacuum86 (2012) 1855]. The results are in good agreement with those of the literature. The slight discrepancy between the obtained and both the theoretical and experimental results regarding the stopping power at very low energy (E<0.5 keV) is discussed.

Computersimulation des Durchgangs schneller schwerer Ionen durch einkristalline dünne Goldschichten

1974 ◽  
Vol 29 (10) ◽  
pp. 1442-1448 ◽  
Author(s):  
H. Schmidt ◽  
H. Ewald
Keyword(s):  
Energy Loss ◽  
Interaction Potential ◽  
High Energy ◽  
Stopping Power ◽  
Fermi Theory ◽  
Slowing Down ◽  
Important Interaction ◽  
Fcc Lattice ◽  
High Energy Ions ◽  
Screened Coulomb Potential

Abstract A Computer program for following the trajectories of high energy ions in a fcc-lattice has been written to study the energy loss of 60 MeV 127I ions channeled between (100)- and (111)- planes of a Au-single crystal. The motion of the ions is treated classically. It is assumed that the ion has only one important interaction at a time as it moves through the lattice. The interaction potential used in the calculation is a screened Coulomb potential with a screening function derived from Thomas-Fermi-theory. The slowing down of the incident ions through inelastic encounters with the atoms of the medium is described by a stopping power function which increases exponentially with the distance from the midplane of the channel walls.

Slowing down for Ion Penetration through Plasmas

2014 ◽  
Vol 703 ◽  
pp. 94-97
Author(s):  
Gui Qiu Wang ◽  
Si Yuan Liu ◽  
Yao Chuan Wang
Keyword(s):  
Dielectric Response ◽  
Stopping Power ◽  
Projectile Velocity ◽  
Carbon Ion ◽  
Slowing Down ◽  
Maximum Value ◽  
Charge States ◽  
Ion Penetration

Slowing down processes for a proton and a carbon ion penetration through plasmas are studied within the dielectric response theory.The results show that the stopping power of ion will increase in lower projectile velocity, while the value of stopping power will decrease for higer velocity, and there is a maximum value for stopping power for some projectile velocity due to the resonace of excitation of plasmas. In addition, the stopping power will have higher value for carbon ion than proton due to the effects of charge states. Introduction

Antiproton Slowing Down inH2and He and Evidence of Nuclear Stopping Power

1995 ◽  
Vol 74 (3) ◽  
pp. 371-374 ◽  
Author(s):  
M. Agnello ◽  
G. Belli ◽  
G. Bendiscioli ◽  
A. Bertin ◽  
E. Botta ◽  
...  
Keyword(s):  
Stopping Power ◽  
Nuclear Stopping ◽  
Slowing Down

Electronic Stopping of Channeled Ions in Silicon

1992 ◽  
Vol 279 ◽  
Author(s):  
Gerhard Hobler ◽  
Hans W. Pötzl
Keyword(s):  
Electron Density ◽  
Stopping Power ◽  
Ion Energy ◽  
Slowing Down ◽  
Dependent Part ◽  
Power Models ◽  
Local Impact ◽  
Parameter Dependent ◽  
Nonlocal Part ◽  
Structure Calculations

ABSTRACTConcentration profiles of channeling and random implants of boron, phosphorus, and arsenic in silicon are compiled from the literature and are analyzed using Monte Carlo simulations. An empirical 3-parameter model of the electronic stopping power is found which yields excellent results for all channeling directions in the energy range of about 20 keV to 1 MeV. The model contains a local impact parameter dependent part and a nonlocal part, the latter increasing with ion energy. In addition, local electron density dependent stopping power models are investigated, using a realistic electron density distribution obtained by first principles band structure calculations. These models fail to describe the slowing down of ions channeled along the <110> axis.

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