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Time-of-flight recoil detection in transmission using pulsed keV ion beams enables sensitive multi-element profiling with high depth resolution
- Publication Year :
- 2022
-
Abstract
- The potential of time-of-flight recoil detection in transmission geometry using pulsed keV ion beams for sensitive multi-element profiling of thin membranes and quasi-2D systems is assessed. While the time-of-flight approach allows for simultaneous detection of multiple elements, to the largest extent irrespective of recoil charge states, the keV projectile energies guarantee high recoil-cross sections yielding high sensitivity at low dose. We demonstrate the capabilities of the approach using 22Ne and 40Ar as projectiles transmitted through thin carbon foil featuring optional LiF-coatings and single crystalline silicon membranes for different sample preparation routines and crystal orientations. For a large position sensitive detector (0.13 sr), a high-depth resolution below 6 nm and sensitivity below 1014 atoms/cm2 was achieved. For crystalline targets, we show how the probability of creation and detection of recoils and their observed angular distribution depend on sample orientation.
- Subjects :
- Physics - Applied Physics
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2203.09419
- Document Type :
- Working Paper