title: Use of a Si(Li) detector as β spectrometer.
abstract: The aim of this work is to demonstrate the capability of a Si(Li) detector for the measurement of β spectra, despite the energy absorption in air and in the Be window. A simple source holder fixes the source on the symmetry axis at 3mm from the detector window. The β-sources are produced by evaporation on a plastic backing plate. Absorbing materials between the source and the sensitive volume of the detector are 3 mm of air, a Be window, 0.1 μm Si and 20 nm of gold. A model of the detector was created for β spectra simulation using the MCNP 4A code. Experimental spectra of (14)C, (147)Pm, (204)Tl, (90)Sr/(90)Y were compared with simulated spectra.
authors.affiliation: Czech Metrology Institute, Radiova 1, CZ-102 00 Prague 10, Czech Republic. Electronic address: pdryak@cmi.cz.
authors.forename: P
authors.initials: P
authors.lastname: Dryák
authors.affiliation: Czech Metrology Institute, Radiova 1, CZ-102 00 Prague 10, Czech Republic.
authors.forename: P
authors.initials: P
authors.lastname: Kovář
keywords: Endpoint of the β spectrum; Si(Li) detector; β-particle spectrometry