A lithium fluoride crystal slab was irradiated in air with a proton beam of nominal 7 MeV energy at a linear accelerator that is under development at ENEA C.R. Frascati. The irradiation generated a spatial distribution of stable colour centres in the crystal that could be detected as a luminescent image under blue-light excitation in a fluorescence microscope. The reconstruction of the whole Bragg curve from the luminescent image is here demonstrated for the first time by taking into account finite proton-energy bandwidth and saturation of defect concentration due to high absorbed dose. The obtained results confirm lithium fluoride detectors based on visible photoluminescence of radiation-induced aggregate colour centres as reliable candidate devices for advanced proton-beam diagnostics. © CopyrightEPLA, 2018.
Titolo: | Bragg-curve imaging of 7 MeV protons in a lithium fluoride crystal by fluorescence microscopy of colour centres |
Autori: | |
Data di pubblicazione: | 2017 |
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Handle: | http://hdl.handle.net/20.500.12079/2035 |
Appare nelle tipologie: | 1.1 Articolo in rivista |