Accurate hydrogen depth profiling by reflection elastic recoil detection analysis

Compositional analysis of polycrystalline hafnium oxide thin films by heavy-ion elastic recoil detection analysis

The composition of polycrystalline hafnium oxide thin films has been measured by heavy-ion elastic recoil detection analysis (HI-ERDA). The films were deposited by high-pressure reactive sputtering (HPRS) with oxygen plasma at pressures between 0.8 and 1.6 mbar and during deposition times between 0.5 and 3.0 hours. Hydrogen was found to be the main impurity and its concentration increased with ...

Accurate Analysis of Shallow Solar Wind Ion Implants by Sims Backside Depth Profiling

Introduction: The NASA mission “Genesis” collected solar wind (SW) for laboratory analysis [1]. SW can serve as a proxy for the Sun’s composition, and thus the average composition of the solar nebula [2], provided that fractionation processes during SW formation [e.g., 3] can be understood and quantitatively modeled. The Geneisis objective is to obtain elemental and isotopic abundances with pre...

Elastic recoil changes in early emphysema.

An attempt was made to determine if emphysema and static lung recoil were related in a group of 65 excised human lungs. We studied 23 normal lungs, 24 lungs with an emphysema score of 5 or less, and 18 lungs with an emphysema score greater than 5. A comparison of the percentage of predicted elastic recoil revealed that both emphysema groups were significantly different from normal lungs. In add...

Recoil corrections in the hydrogen isoelectronic sequence

Accurate Shadows by Depth Complexity Sampling

The accurate generation of soft shadows is a particularly computationally intensive task. In order to reduce rendering time, most real-time and offline applications decorrelate the generation of shadows from the computation of lighting. In addition to such approximations, they generate shadows using some restrictive assumptions only correct in very specific cases, leading to penumbra over-estim...