Democratic Decay of $^{6}\mathrm{Be}$ Exposed by Correlations

Democratic Decay of ${}^{6}{Be}$ Exposed by Correlations

I. A. Egorova, R. J. Charity, L. V. Grigorenko, Z. Chajecki, D. Coupland, J. M. Elson, T. K. Ghosh, M. E. Howard, H. Iwasaki, M. Kilburn, Jenny Lee, W. G. Lynch, J. Manfredi, S. T. Marley, A. Sanetullaev, R. Shane, D. V. Shetty, L. G. Sobotka, M. B. Tsang, J. Winkelbauer, A. H. Wuosmaa, M. Youngs, and M. V. Zhukov

Phys. Rev. Lett. 109, 202502 – Published 13 November 2012

Abstract

The interaction of an $E / A = 70$ -MeV ${}^{7}{Be}$ beam with a Be target was used to populate levels in ${}^{6}{Be}$ following neutron knockout reactions. The three-body decay of the ground and first excited states into the $α + p + p$ exit channel were detected in the High Resolution Array. Precise three-body correlations extracted from the experimental data allowed us to obtain insight into the mechanism of the three-body democratic decay. The correlation data are in good agreement with a three-cluster-model calculation and thus validate this theoretical approach over a broad energy range.

Received 11 August 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.202502

Authors & Affiliations

I. A. Egorova¹, R. J. Charity², L. V. Grigorenko^3,4,5, Z. Chajecki⁶, D. Coupland⁶, J. M. Elson², T. K. Ghosh⁷, M. E. Howard⁸, H. Iwasaki⁶, M. Kilburn⁶, Jenny Lee⁶, W. G. Lynch⁶, J. Manfredi², S. T. Marley⁹, A. Sanetullaev⁶, R. Shane², D. V. Shetty⁹, L. G. Sobotka², M. B. Tsang⁶, J. Winkelbauer⁶, A. H. Wuosmaa⁹, M. Youngs⁶, and M. V. Zhukov¹⁰

¹Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna 141980, Russia
²Departments of Chemistry and Physics, Washington University, Saint Louis, Missouri 63130, USA
³Flerov Laboratory of Nuclear Reactions, JINR, Dubna RU-141980, Russia
⁴GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, D-64291 Darmstadt, Germany
⁵National Research Center, “Kurchatov Institute,” Kurchatov Square 1, RU-123182 Moscow, Russia
⁶National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
⁷Variable Energy Cyclotron Centre, 1/AF Bidhannagar, Kolkata 700064, India
⁸Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903, USA
⁹Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008, USA
¹⁰Fundamental Physics, Chalmers University of Technology, S-41296 Göteborg, Sweden