scholarly journals Degeneracy Effects of Energy loss Straggling of Homo and Hetero Di-Cluster Ions

2021 ◽  
Vol 32 (3) ◽  
pp. 42
Author(s):  
Nadher A. Salman ◽  
Khalid A. Ahmed ◽  
Baida M. Ahmed

The energy loss straggling is obtained from an exact quantum mechanical evaluation, which takes into account the degeneracy of the target plasma, and later it is compared with common classical and degeneracy approximation as a function of incident Homo (H-H, He-He) and Hetero (He-H) di-cluster energy in Kev with different kinds of plasma target. For homonuclear di-clusters (H-H) and (He-He) decreasing temperature, the exact calculation approaches the high degeneracy limit, but the differences are still significant. However, as the temperature rises, the exact result approaches the classical limit. Finally, the energy loss straggling increases with the increasing atomic number of the projectiles (He-He). Our research focuses on targets in the weakly coupled electron gas limit, where we can use the random phase approximation (RPA). This kind of plasma has not been widely researched, considering the fact that it is essential for inertial confinement fusion (ICF).

Author(s):  
C. W. Price ◽  
E. F. Lindsey

Thickness measurements of thin films are performed by both energy-dispersive x-ray spectroscopy (EDS) and x-ray fluorescence (XRF). XRF can measure thicker films than EDS, and XRF measurements also have somewhat greater precision than EDS measurements. However, small components with curved or irregular shapes that are used for various applications in the the Inertial Confinement Fusion program at LLNL present geometrical problems that are not conducive to XRF analyses but may have only a minimal effect on EDS analyses. This work describes the development of an EDS technique to measure the thickness of electroless nickel deposits on gold substrates. Although elaborate correction techniques have been developed for thin-film measurements by x-ray analysis, the thickness of electroless nickel films can be dependent on the plating bath used. Therefore, standard calibration curves were established by correlating EDS data with thickness measurements that were obtained by contact profilometry.


2020 ◽  
Vol 36 ◽  
pp. 100749 ◽  
Author(s):  
R.E. Olson ◽  
R.J. Leeper ◽  
S.H. Batha ◽  
R.R. Peterson ◽  
P.A. Bradley ◽  
...  

2021 ◽  
Vol 28 (3) ◽  
pp. 032713
Author(s):  
Dongguo Kang ◽  
Huasen Zhang ◽  
Shiyang Zou ◽  
Wudi Zheng ◽  
Shaoping Zhu ◽  
...  

2021 ◽  
Vol 92 (7) ◽  
pp. 073505
Author(s):  
T. J. Awe ◽  
L. Perea ◽  
J. C. Hanson ◽  
A. J. York ◽  
D. W. Johnson ◽  
...  

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