Absolute decay width measurements in 16O

C. Wheldon, N.I. Ashwood, M. Barr, N. Curtis, M. Freer, Tzanka Kokalova, J.D. Malcolm, Simeon Spencer, Victor Ziman, Thomas Faestermann, Reiner Krücken, Hans-Friedrich Wirth, Ralf Hertenberger, Rudi Lutter, Andy Bergmaier

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The reaction 12C(6Li, d)16O* at a 6Li bombarding energy of 42 MeV has been used to populate excited states in 16O. The deuteron ejectiles were measured using the high-resolution Munich Q3D spectrograph. A large-acceptance silicon-strip detector array was used to register the recoil and break-up products. This complete kinematic set-up has enabled absolute α-decay widths to be measured with high-resolution in the 13.9 to 15.9 MeV excitation energy regime in 16O; many for the first time. This energy region spans the 14.4 MeV four-α breakup threshold. Monte-Carlo simulations of the detector geometry and break-up processes yield detection efficiencies for the two dominant decay modes of 40% and 37% for the α+12C(g.s.) and α+12C(2+) break-up channels respectively.
Original languageEnglish
Pages (from-to)1-
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 1 Jan 2012


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