Open AccessPositron lifetime spectroscopy applied to pure sulphur and selenium
Author(s) -
R. DomínguezReyes,
A. Rodriguez-Lopez
Publication year - 2022
Publication title -
materials research express
Language(s) - English
Resource type - Journals
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ac5485
Subject(s) - positron , positron lifetime spectroscopy , selenium , orthorhombic crystal system , spectroscopy , positron annihilation , materials science , sulfur , positron annihilation spectroscopy , hexagonal crystal system , analytical chemistry (journal) , chemistry , crystallography , physics , electron , nuclear physics , metallurgy , crystal structure , chromatography , quantum mechanics
High purity crystalline orthorhombic Sulphur and hexagonal Selenium have been investigated using Positron Lifetime Spectroscopy technique. Annealed for 3 h at 120 °C Selenium lifetime (308(1) ps) has been compared with previous Positron Lifetime Spectroscopy knowledge in order to validate the measurements and the analysis procedure, and also compared with theoretical calculations available in literature, including different methods and parametrizations, resulting on the best match of LMTO-ASA method with GGA parametrization. Annealed for 3 h at 80 °C Sulphur samples were studied by the same means providing a single lifetime component with value 300(1) ps that has been assigned to the positron annihilation in the bulk that is not present in the current literature.