THE DETERIORATION DEPTH IN ZnS:Ag UNDER PROLONGED BOMBARDMENT BY HEAVY IONS

1967 ◽  
Vol 45 (7) ◽  
pp. 2239-2248
Author(s):  
A. van Wijngaarden ◽  
L. Hastings
Keyword(s):  
Energy Loss ◽  
Heavy Ions ◽  
Incident Energy ◽  
Square Root ◽  
Phosphor Sample ◽  
Order Of Magnitude

Local regions on a ZnS:Ag phosphor sample were bombarded by a large number (~1014 per cm2) of heavy ions. This irradiation damaged the phosphor to various depths which depended on the energy of the deteriorating ions. These depths were determined by measuring the energy loss of energetic hydrogen projectiles as they passed through the damaged phosphor regions. It was found that the deterioration depths increase approximately as the square root of the incident energy and for the heavier projectiles (40Ar and 84Kr) these depths are about an order of magnitude larger than the corresponding ranges predicted by the Lindhard theory. No direct correlation, however, between the deterioration depth and the range of the heavier ions is implied.

Energy loss of heavy ions in a dense hydrogen plasma

1990 ◽  
Vol 16 (4) ◽  
pp. 229-230 ◽  
Author(s):  
K-G Dietrich ◽  
D. H. H. Hoffmann ◽  
H. Wahl ◽  
C. R. Haas ◽  
H. Kunze ◽  
...  
Keyword(s):  
Energy Loss ◽  
Heavy Ions ◽  
Hydrogen Plasma

A New Method to Determine the Energy Loss of Heavy Ions in Solids

1975 ◽  
pp. 77-83
Author(s):  
Horst Schmidt-Böcking ◽  
Gerd Rühle ◽  
Klaus Bethge
Keyword(s):  
Energy Loss ◽  
Heavy Ions ◽  
New Method

Color-center creation inLiFunder irradiation with swift heavy ions: Dependence on energy loss and fluence

2004 ◽  
Vol 70 (18) ◽  
Author(s):  
K. Schwartz ◽  
C. Trautmann ◽  
A. S. El-Said ◽  
R. Neumann ◽  
M. Toulemonde ◽  
...  
Keyword(s):  
Energy Loss ◽  
Color Center ◽  
Heavy Ions ◽  
Swift Heavy Ions

scholarly journals Ranges and Energy-Loss Processes of Heavy Ions in Emulsion

1960 ◽  
Vol 117 (2) ◽  
pp. 544-556 ◽  
Author(s):  
Harry H. Heckman ◽  
Betty L. Perkins ◽  
William G. Simon ◽  
Frances M. Smith ◽  
Walter H. Barkas
Keyword(s):  
Energy Loss ◽  
Heavy Ions

Large energy-loss straggling of swift heavy ions in ultra-thin active silicon layers

2013 ◽  
Vol 22 (9) ◽  
pp. 096103 ◽  
Author(s):  
Zhan-Gang Zhang ◽  
Jie Liu ◽  
Ming-Dong Hou ◽  
You-Mei Sun ◽  
Fa-Zhan Zhao ◽  
...  
Keyword(s):  
Energy Loss ◽  
Heavy Ions ◽  
Large Energy ◽  
Swift Heavy Ions

Collision site effect on the radiation dynamics of cytosine induced by proton

2022 ◽  
Author(s):  
Xu Wang ◽  
Zhi-Ping Wang ◽  
Feng-Shou Zhang ◽  
Chao-Yi Qian
Keyword(s):  
Energy Loss ◽  
Incident Energy ◽  
Density Functional ◽  
Degrees Of Freedom ◽  
Site Effect ◽  
Low Energy ◽  
Microscopic Mechanism ◽  
Scattering Angle ◽  
Fragment Mass ◽  
Dynamics Simulations

Abstract By combing the time-dependent density functional calculations for electrons with molecular dynamics simulations for ions (TDDFT-MD) nonadiabatically in real time, we investigate the microscopic mechanism of collisions between cytosine and low-energy protons with incident energy ranging from 150 eV to 1000 eV. To explore the effects of the collision site and the proton incident energy on irradiation processes of cytosine, two collision sites are specially considered, which are N and O both acting as the proton receptors when forming hydrogen bonds with guanine. Not only the energy loss and the scattering angle of the projectile, but also the electronic and ionic degrees of freedom of the target are identified. It is found that the energy loss of proton increases linearly with the increase of the incident energy in both situations, which are 14.2% and 21.1% of the incident energy respectively. However, the scattering angles show different behaviors in these two situations when the incident kinetic energy increases. When proton collides with O, the scattering angle of proton is larger and the energy lost is more, while proton captures less electrons from O. The calculated fragment mass distribution shows the high counts of the fragment mass of 1, implying the production of H+ fragment ion from cytosine even for proton with the incident energy lower than keV. Furthermore, the calculated results show that N on cytosine is easier to be combined with low-energy protons to form NH bonds than O.

Energy Loss for Swift Heavy Ions in Different Elemental Absorbers: A Different Approach for Effective Charge Parameterization

2015 ◽  
Vol 238 ◽  
pp. 196-205
Author(s):  
B. Rani ◽  
Kalpana Sharma ◽  
Neetu ◽  
Anupam ◽  
Shyam Kumar ◽  
...  
Keyword(s):  
Experimental Data ◽  
Energy Loss ◽  
Effective Charge ◽  
Heavy Ions ◽  
Close Agreement ◽  
Input Parameter ◽  
Quantum Mechanical ◽  
Swift Heavy Ions ◽  
Calculated Energy ◽  
Semi Empirical

The energy loss for swift heavy ions, covering Z=3-29(~0.2 - 5.0MeV/n), has been calculated in the elemental absorbers like C, Al and Ti. The present calculations are based on Bohr’s approach applicable in both classical and quantum mechanical regimes. The major input parameter, the effective charge, has been calculated in a different way without any empirical/semi-empirical parameterization. The calculated energy loss values have been compared with the available experimental data which results in a close agreement.

THE ENERGY LOSS, THE DETERIORATION DEPTH, AND THE LIGHT OUTPUT FOR HEAVY IONS IN ZnO:Zn

1967 ◽  
Vol 45 (12) ◽  
pp. 4039-4051 ◽  
Author(s):  
L. Hastings ◽  
A. van Wijngaarden
Keyword(s):  
Energy Loss ◽  
Heavy Ions ◽  
Light Output ◽  
Average Energy ◽  
Ion Beams ◽  
Low Energy ◽  
Energy Losses ◽  
Sufficient Energy ◽  
Low Energy Ions ◽  
Total Average

Local regions on the surface of ZnO:Zn phosphor samples were deteriorated by a large number of low-energy ions. In this manner thin films which did not luminesce under ion bombardment were prepared. The phosphor samples were then scanned across energetic ion beams with sufficient energy to traverse the thin phosphor films. By comparing the luminescent response to this ion excitation in the damaged and undamaged portions of the phosphor surface, the total average energy losses of 1H, 4He, 14N, 40Ar, and 84Kr in passing through the films were determined. It was found that the energy losses for the heavier projectiles, when compared with the energy loss of hydrogen, are appreciably smaller than the energy losses predicted by the Lindhard and Scharff theory.The deterioration depth of the phosphor under prolonged bombardment is proportional to the speed of the damaging projectiles.

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