The α( 10 Be, α) 10 Be resonant scattering reaction has been measured at nine 10 Be beam energies from 25 to 48 MeV, scanning out resonances in 14 C from excitation energies of 13 to 24 MeV. Angular distribution measurements were used to assign the spin and parity of 5 − to resonances at E x = 18.82(2) and 19.67(2) MeV and 6 + at E x = 20.80(2) MeV. The data also strongly indicate a 3 − resonance at 17.32(2) MeV. The systematic uncertainty on the excitation energies is 175 keV. An R-matrix analysis has been performed for the excitation energy range 16.5 to 22 MeV. The data are discussed in terms of cluster bands in 14 C.

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document.When citing, please reference the published version. Take down policyWhile the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

An experiment has been carried out using the 9Be(3He, r)9B* reaction at a beam energy of 33 MeV. A large acceptance silicon-strip array was used to detect the 9B* break-up in coincidence with the triton ejectiles in the high-resolution Munich-Q3D spectrograph. The excitation energy regime <3 MeV has been explored and the spectrum resulting from proton decaying states, isolated and characterized. Additional resonance strength is observed at 1.86 MeV ±70 keV(stat) ±35 keV(syst), in agreement with two other recent measurements at higher energies and different angles. The consequences for the "missing" >/2+ first excited state are discussed. Additionally, the branching ratios for the 2.36 MeV 5/i~ state have been measured as r»o/r = 0.98 ± 0.12 and i> /r = 0.016 ± 0.008, in close agreement with earlier work.