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Bochum 2009 – scientific programme

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HK: Fachverband Hadronen und Kerne

HK 54: Nuclear Physics Applications

HK 54.1: Invited Group Report

Wednesday, March 18, 2009, 14:00–14:30, H-ZO 100

Beta decay measurements of importance for reactor heat calculations — •Alejandro Algora — IFIC (CSIC-Univ. Valencia), Valencia, Spain

Beta decay studies provide in many cases our primary information on the structure of unstable nuclei. These studies are in general complementary to in-beam studies and present different difficulties to the experimenter. In the case of beta decay one common experimental problem is the so-called "Pandemonium effect" [1] when decays with large Q values are studied. The solution to this problem is the application of the total abpsortion spectroscopy (TAS) technique.

In this contribution the results of recent beta-decay studies using the TAS technique will be presented. The main goal of these measurements was the study of nuclei that had been identified as important contributors to the decay heat in reactors [2]. The results of the analysis and their impact in reactor decay heat summation calculations will be presented.

[1] J. C. Hardy, L. C. Carraz, B. Jonson, P. G. Hansen, Phys. Letts 71B (1977) 307 [2] T. Yoshida, T. Tachibana, F. Storrer, K. Oyamatsu and J. Katakura, J. Nucl. Sci. Technol. 36 (1999) 135

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