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Showing 1 to 12 of 12 for “"stopping powers"”.
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An Experimental Study of Stopping Powers for Ions of Intermediate Atomic Numbers
Made available in DSpace on 2015-05-13T15:21:56Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7606702.PDF: 4276564 bytes, checksum: 348106430711334e40a79514912d6e19 (MD5) Previous issue date: 1975
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An experimental study of stopping powers for ions of intermediate atomic studies
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-04-22T18:10:13Z No. of bitstreams: 1 1975_bucher.pdf: 4464437 bytes, checksum: 4f6e1a9b761c805241512af16b382666 (MD5)
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Extending the dielectric formalism in warm dense matter: collisions, dynamic structure factors, and stopping powers
… material properties like transport coefficients, stopping powers, scattering and absorption spectra, and many other quantities in the WDM regime. However, competing physical effects, like partial ionization, correlated ion behavior, and quantum degeneracy makes model- ing WDM challenging and often …
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The Stopping of Energetic Si, P and S Ions in Ni, Cu, Ge and GaAs Targets
Accurate knowledge of stopping powers is essential for these for quantitative analysis and surface characterization of thin films using ion beam analysis (IBA). These values are also of interest in radiobiology and radiotherapy, and in ion- implantation technology where shrinking feature sizes puts …
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Development of a Time of Flight - Energy spectrometer for applications in Heavy Ion - Elastic Recoil Detection thin film analysis
… materials analysis, and secondly, to measure stopping powers of heavy ions in thin foil compound materials using the newly built spectrometer. Key to the performance of the assembled spectrometer was its timing resolution. Characterisation measurements using a 27.5 MeV Kr15+ incident beam …
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Implementation of An Anthropomorphic Phantom For The Evaluation of Proton Therapy Treatment Procedures
… for use in proton therapy. The relative stopping power (SP) of each phantom material was measured. Hounsfield Units (HU) for each phantom material were measured with a CT scanner and compared to the relative stopping power calibration curve. The tissue equivalency for each material was …
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NANOPATTERNING OF FREE-STANDING VAN DER WAALS HETEROSTRUCTURES USING CHARGED PARTICLES
… leveraging differences in electronic and nuclear stopping powers, we achieve layer-specific modification where the active layer (graphene or TMD) is altered while the surrounding hBN remains intact. Combining experimental nanopatterning, (S)TEM characterization, and SRIM-based ion–solid …
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Simulation of muon-catalysed fusion experiments
… coincidences and relying on the differing stopping powers of the α and αμ ions. The Monte Carlo simulations provide estimates of geometrical and detection efficiency factors required for the calculation of the sticking coefficient from the experimental measurements. Simulations have been …
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Sub-10-nm lithography with light-ion beams
… as directly proportional to the so-called stopping power of incident beam particles - i.e. the average energy loss per unit path length, particularly for thin (less than 20 nm thick) resist. Values of stopping power are readily obtained via the popular Stopping and Range of Ions in Matter …
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Effects of vacancies and electron temperature on the electron phonon coupling in cubic silicon carbide and their connection to the inelastic thermal spike
… coupling is justifiable at lower electronic stopping powers far from the track core (beyond several nm). At the center of the track, however, the coupling is strong (on the order of 10<sup>16</sup> W cm<sup>-3</sup> K) and decreases rapidly with radius. These results reveal some weaknesses of …
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Penumbral Distributions For High-energy Radiotherapy Photon Beams: Experimental And Theoretical Determinations
… Klein-Nishina differential collision formula and stopping powers. The primary dose spread functions (or kernels) were convolved with the appropriate primary penumbral photon-fluence distributions to obtain the corresponding penumbral primary dose distributions in homogeneous phantoms. There was …
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Reproducing the line-shape of a Doppler-broadened Gamma-line in 10Be following the beta-decay of 11Li using Geant4
… error due to the range of energy losses and stopping powers predicted by various models. For the $0^+_2$ state of \atom{10}{}{Be}{}{}, the predicted half-life ranged from 981 fs to over 1500 fs depending on the employed energy loss model. This range of values is greater than the suggested …