Dresden 2006 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 50: Poster II

HL 50.56: Poster

Donnerstag, 30. März 2006, 16:30–19:00, P3

PAC studies with LSO scintillation crystals — •Riccardo Valentini and Reiner Vianden — Helmholtz - Institut für Strahlen- und Kernphysik der Universität Bonn, Nußallee 14-16, 53115 Bonn, Germany

The LSO (lutetium oxyorthosilicate, Lu₂SiO₅) scintillation crystal has been shown to improve the efficiency of PET apparatus considerably [1] [2]. This makes LSO interesting for Perturbed Angular Correlation (PAC) since today’s solid state studies require appropriate PAC probes for specific purposes, like ⁷⁷Br, ¹⁸⁷W or ¹⁷²Lu, with more complicated energy spectra. We investigated the applicability of this new scintillator for PAC studies especially in experiments where the improvement of energy resolution as compared to BaF₂ is important without loosing time resolution. From these improvements we expect a larger effective anisotropy. Further due to the high average atomic number of LSO its photopeak efficiency is considerably high. We present here test measurements with ¹⁷²Lu in ZnO and a comparison with measurements on a BaF₂ setup.

[1] R. Nutt et al., Revue de l’Acomen, 5, 1999, 152

[2] C.M. Pépin et al., IEEE Trans on Nucl. Sci., 51, 2004, 789