Exploring the spin states of 90Zr populated by (p,p’), (p,d), and (p,t) reactions
1 Lawrence Livermore National Laboratory, Physics and Life Science Directorate, Livermore, CA 94551, USA
2 St. Mary’s College, Halifax, Nova Scotia, Canada
3 Texas A & M University, Cyclotron Institute, College Station, TX 77840 USA
4 University of Kentucky, Department of Chemistry, Lexington, KY 40506, USA
a Corresponding author: firstname.lastname@example.org
Published online: 21 June 2016
The 90Zr nucleus was produced by three different reactions: 90Zr(p,p’), 91Zr(p,d), and 92Zr(p,t), and the spin-parity (Jπ) population of the 90Zr states produced by these reactions was studied to investigate the surrogate reaction approach, which aims at indirectly determining cross sections for compound-nuclear reactions involving unstable targets such as 89Zr(n,γ). Discrete γ-rays, associated with the de-excitation of 90Zr and 89Zr, were measured in coincidence with light ions at 90Zr excitation energies extending above the neutron separation energy. Low-lying states populated by (p,d) and (p,t) reactions agreed well with the previous measurements. The measured γ transition systematics were used to gain insights into the Jπ distribution of 90Zr around the neutron separation energy and it was found that the (p,p’) reaction preferentially produces lower J states than (p,d) and (p,t) reactions in the studied energy region.
© The Authors, published by EDP Sciences, 2016
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