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.

THE ENERGY LOSS OF HEAVY IONS IN ZnS:Ag IN THE keV ENERGY RANGE

1967 ◽  
Vol 45 (7) ◽  
pp. 2333-2342 ◽  
Author(s):  
L. Hastings ◽  
P. R. Ryall ◽  
A. van Wijngaarden
Keyword(s):  
Thin Films ◽  
Energy Loss ◽  
Heavy Ions ◽  
Average Energy ◽  
Ion Beams ◽  
Low Energy ◽  
Energy Losses ◽  
Sufficient Energy ◽  
Low Energy Ions ◽  
Total Average

Local spots on the surface of ZnS:Ag phosphor samples were deteriorated by a large number (~5 × 1013 ions per cm2) of low-energy ions. In this manner thin films which did not luminesce under ion bombardment were prepared. These phosphor samples were 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 for hydrogen, are appreciably smaller than those predicted by the Lindhard and Scharff theory.

Time-resolved measurement of energy loss of low-energy heavy ions in a plasma using a surface-barrier charged-particle detector

2008 ◽  
Vol 50 (2-6) ◽  
pp. 606-610 ◽  
Author(s):  
S. Nishinomiya ◽  
K. Katagiri ◽  
T. Niinou ◽  
J. Kaneko ◽  
H. Fukuda ◽  
...  
Keyword(s):  
Charged Particle ◽  
Energy Loss ◽  
Heavy Ions ◽  
Low Energy ◽  
Surface Barrier ◽  
Particle Detector ◽  
Time Resolved

scholarly journals Outflow of low-energy O<sup>+</sup> ion beams observed during periods without substorms

2015 ◽  
Vol 33 (3) ◽  
pp. 333-344 ◽  
Author(s):  
G. K. Parks ◽  
E. Lee ◽  
S. Y. Fu ◽  
M. Fillingim ◽  
I. Dandouras ◽  
...  
Keyword(s):  
Flow Rate ◽  
Heavy Ion ◽  
Auroral Oval ◽  
Ion Beams ◽  
Low Energy ◽  
Ion Composition ◽  
Spacecraft Potential ◽  
Imaging Camera ◽  
Cluster Ion ◽  
Low Energy Ions

Abstract. Numerous observations have shown that ions flow out of the ionosphere during substorms with more fluxes leaving as the substorm intensity increases (Wilson et al., 2004). In this article we show observations of low-energy (few tens of electron volts) ionospheric ions flowing out periods without substorms, determined using the Wideband Imaging Camera (WIC) and Auroral Electrojet (AE) indices. We use Cluster ion composition data and show the outflowing ions are field-aligned H+, He+ and O+ beams accelerated to energies of ~40–80 eV, after correcting for spacecraft potential. The estimated fluxes of the low-energy O+ ions measured at ~20 000 km altitude are >103–105 cm−2 s. Assuming the auroral oval is the source of the escaping ions, the measured fluxes correspond to a flow rate of ~1019–1021 ions s−1 leaving the ionosphere. However, periods without substorms can persist for hours suggesting the low-energy ions flowing out during these times could be a major source of the heavy ion population in the plasma sheet and lobe.

scholarly journals Enhanced energy loss of heavy ions passing a fully ionized hydrogen plasma

1996 ◽  
Vol 14 (4) ◽  
pp. 599-604 ◽  
Author(s):  
R. Kowalewicz ◽  
E. Boggasch ◽  
D.H.H. Hoffmann ◽  
J. Jacoby ◽  
W. Laux ◽  
...  
Keyword(s):  
Energy Loss ◽  
Heavy Ions ◽  
Electrical Discharge ◽  
Hydrogen Plasma ◽  
Hydrogen Gas ◽  
Low Energy ◽  
Stopping Power ◽  
Electron Densities ◽  
Singly Charged

Experiments are presented that demonstrate the high stopping power of fully ionized hydrogen plasma for low-energy heavy ions. A plasma with electron densities up to 7.1016 cm–3 at temperatures above 1 eV was created by an electrical discharge. In the described experiment, a stopping power of 1.08 GeV/(mg/cm2) was measured using singly charged krypton ions at 45–keV/u energy. The measured stopping power exceeds the corresponding value in cold hydrogen gas by a factor of 35. These measurements confirm the theoretical stopping power predictions close to the expected maximum in a fully ionized plasma.

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