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Dresden 2006 – scientific programme

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HL: Halbleiterphysik

HL 50: Poster II

HL 50.56: Poster

Thursday, March 30, 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

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