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An independent measurement of the 12C(α, γ)16O cross section with the Karlsruhe 4π BaF2 detector

✍ Scribed by R. Plag; M. Heil; F. Käppeler; R. Reifarth; K. Wisshak

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
239 KB
Volume
758
Category
Article
ISSN
0375-9474

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✦ Synopsis

An independent approach for the measurement of the 12 C(α, γ) 16 O cross section at low energies has been performed at Forschungszentrum Karlsruhe using the 4π BaF 2 detector and the pulsed 3.7 MV Van de Graaff accelerator. Covering the full solid angle, the Karlsruhe 4π BaF 2 detector combines high gamma-ray efficiency with a 42-fold segmentation. This allows one to measure the total 12 C(α, γ) 16 O cross section and the angular distribution simultaneously. The Van de Graaff accelerator was operated in pulsed mode in order to discriminate neutron background from the 13 C(α,n) 16 O reaction. With a pulse width below 2 ns and beam currents of up to 6 µA, the cross section could be measured at center of mass energies between 1.0 and 1.51 MeV yielding angular distributions with up to 12 angles.

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