Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8041634 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2014 | 5 Pages |
Abstract
The Stopping and Range of Ions in Matter (SRIM) code has been widely used to predict nuclear stopping power and angular distribution of ion-solid collisions. However, experimental validation of the predictions is insufficient for slow heavy ions in nonmetallic compounds. In this work, time-of-flight secondary ion mass spectrometry (ToF-SIMS) is applied to determine the angular distribution of 1Â MeV Au ions after penetrating a Si3N4 foil with a thickness of â¼100Â nm. The exiting Au ions are collected by a Si wafer located â¼14Â mm behind the Si3N4 foil, and the resulting 2-dimensional distribution of Au ions on the Si wafer is measured by ToF-SIMS. The SRIM-predicted angular distribution of Au ions through the Si3N4 thin foil is compared with the measured results, indicating that SRIM slightly overestimates the nuclear stopping power by up to 10%. In addition, thickness reduction of the suspended Si3N4 foils induced by 1Â MeV Au ion irradiation is observed with an average loss rate of â¼107Â atoms/ion.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Ke Jin, Zihua Zhu, Sandeep Manandhar, Jia Liu, Chien-Hung Chen, Vaithiyalingam Shutthanandan, Suntharampillai Thevuthasan, William J. Weber, Yanwen Zhang,