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arxiv: 1504.00489 · v1 · pith:OL7LHDW7new · submitted 2015-04-02 · ⚛️ nucl-ex

A pair spectrometer for measuring multipolarities of energetic nuclear transitions

J. Guly\'as , T.J. Ketel , A.J. Krasznahorkay , M. Csatl\'os , L. Csige , Z. G\'acsi , M. Hunyadi , A. Krasznahorkay
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A. Vit\'ez T.G. Tornyi
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keywords angularcorrelationselectron-positronpairsrangetransitionsarraybeen
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A multi-detector array has been designed and constructed for the simultaneous measurement of energy- and angular correlations of electron-positron pairs. Experimental results are obtained over a wide angular range for high-energy transitions in 16O, 12C and 8Be. A comparison with GEANT simulations demonstrates that angular correlations between 50 and 180 degrees of the electron-positron pairs in the energy range between 6 and 18 MeV can be determined with sufficient resolution and efficiency.

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