Breakup branches of Borromean beryllium-9

Robin Smith, M. Freer, C. Wheldon, N. Curtis, S. Almaraz-Calderon, A. Aprahamian, N. I. Ashwood, M. Barr, B. Bucher, P. Copp, M. Couder, X. Fang, G. Goldring, F. Jung, Tzanka Kokalova Wheldon, S. R. Lesher, W. Lu, J. D. Malcolm, A. Roberts, W. P. TanVictor Ziman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


The breakup reaction 9Be(4He, 3α)n was measured using an array of four double-sided silicon strip detectors at beam energies of 22 and 26 MeV. Excited states in 9Be up to 12 MeV were populated and reconstructed through the measurement of the charged reaction products. It is proposed that limits on the spins and parities of the states can be derived from the way that they decay. Various breakup paths for excited states in 9Be have been explored including the 8Beg.s. + n, 8Be2 + + n and 5Heg.s. + 4He channels. By imposing the condition that the breakup proceeded via the 8Be ground state, clean excitation spectra for 9Be were reconstructed. The remaining two breakup channels were found to possess strongly-overlapping kinematic signatures and more sophisticated methods (referenced) are required to completely disentangle these other possibilities. Emphasis is placed on the development of the experimental analysis and the usefulness of Monte-Carlo simulations for this purpose.

Original languageEnglish
Title of host publicationNuclear Structure and Dynamics 2015
PublisherAIP Publishing
ISBN (Electronic)9780735413283
Publication statusPublished - 15 Oct 2015
Event3rd International Conference on Nuclear Structure and Dynamics - Portoroz, Slovenia
Duration: 14 Jun 201519 Jun 2015


Conference3rd International Conference on Nuclear Structure and Dynamics

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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