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Dickmann, Marcel
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Publications (7/7 displayed)
- 2024Positron lifetime study of ion-irradiated tungsten: Ion type and dose effectscitations
- 2021Porosimetry for Thin Films of Metal–Organic Frameworkscitations
- 2021Identification of lead vacancy defects in lead halide perovskitescitations
- 2020Solvent-Free Powder Synthesis and MOF-CVD Thin Films of the Large-Pore Metal-Organic Framework MAF-6citations
- 2020Morphology of Thin Film Composite Membranes Explored by Small-Angle Neutron Scattering and Positron-Annihilation Lifetime Spectroscopycitations
- 2018Annealing behavior of open spaces in AlON films studied by monoenergetic positron beamscitations
- 2017New insights into the nanostructure of innovative thin film solar cells gained by positron annihilation spectroscopycitations
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article
Positron lifetime study of ion-irradiated tungsten: Ion type and dose effects
Abstract
Polycrystalline recrystallized tungsten samples were irradiated with 7.5 MeV Si ions and 9 MeV Cu ions to threedifferent damage levels (0.01, 0.1, 0.5 dpa at 200 nm depth) at 295 K. The resulting vacancy-type defects in thesamples were studied using positron annihilation lifetime spectroscopy. The dependence of the average positronlifetime on the damage level is found to be non-linear: a steep increase at low damage levels with a tendency tosaturation at higher damage levels (>0.1 dpa). The average positron lifetime of Si and Cu-irradiated tungsten isvery similar at each damage level, suggesting similar vacancy-type defect structure. Deconvolution of thepositron lifetime spectra revealed that the dominant irradiation-induced defect type is a single vacancy. Thepresence of small vacancy clusters is also detected. Their fraction is found to increase with increasing damagelevel.