Disentangling unclear nuclear breakup channels of beryllium-9 using the three-axis Dalitz plot

11th International Conference on Clustering Aspects of Nuclear Structure and Dynamics

Smith, R.^1 ; Freer, M.^1 ; Wheldon, C.^1 ; Curtis, N.^1 ; Almaraz-Calderon, S.^2 ; Aprahamian, A.^2 ; Ashwood, N.I.^1 ; Barr, M.^1 ; Bucher, B.^2 ; Copp, P.^3 ; Couder, M.^2 ; Fang, X.^2 ; Goldring, G.^4 ; Jung, F.^2 ; Kokalova, Tz^1 ; Lesher, S.R.^3 ; Lu, W.^2 ; Malcolm, J.D.^1 ; Roberts, A.^2 ; Tan, W.P.^2 ; Ziman, V.A.^1

School of Physics and Astronomy, University of Birmingham, Edgbaston

B15 2TT, United Kingdom^1

Institute for Structure and Nuclear Astrophysics, Department of Physics, University of Notre Dame, Notre Dame

IN

46556, United States^2

Department of Physics, University of Wisconsin - la Crosse, La Crosse

WI

54601, United States^3

Department of Particle Physics, Weizmann Institute, Rehovot

76100, Israel^4

关键词: Branching ratio;    Non-uniform;    Reaction channels;    Three-axis;    Unequal mass;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/863/1/012032/pdf
DOI  :  10.1088/1742-6596/863/1/012032

来源: IOP

【 摘 要 】

The three-axis Dalitz plot has been applied to the breakup of a nucleus into unequal mass fragments for the first time. The Dalitz plot allows clear identification of the various breakup channels of9Be → 2α + n process. The method has allowed the branching ratio for the 6.38 MeV level in9Be to be provisionally calculated when examining the9Be(4He, α)ααn reaction. The effects of non-uniform angular distributions on the Dalitz plot must still be properly investigated along with the effects of contaminant reaction channels. It is proposed that this method could be used to determine the breakup branching ratio of a newly-measured level in this nucleus.