Observation of T=3/2 Isobaric Analog States in 9Be using p+8Li resonance scattering
Abstract
Background: Resonance scattering has been extensively used to study the structure of exotic, neutron-deficient nuclei. Extension of the resonance scattering technique to neutron-rich nuclei was suggested more than 20 years ago. This development is based on the isospin conservation law. In spite of broad field of the application, it has never gained a wide-spread acceptance. Purpose: To benchmark the experimental approach to study the structure of exotic neutron-rich nuclei through resonance scattering on a proton target. Method: The excitation function for p+8Li resonance scattering is measured using a thick target by recording coincidence between light and heavy recoils, populating T=3/2 isobaric analog states (IAS) in 9Be. Results: A good fit of the 8Li(p,p)8Li resonance elastic scattering excitation function was obtained using previously tentatively known 5/2- T=3/2 state at 18.65 MeV in 9Be and a new broad T=3/2 s-wave state - the 5/2+ at 18.5 MeV. These results fit the expected iso-mirror properties for the T=3/2 A=9 iso-quartet. Conclusions: Our analysis confirmed isospin as a good quantum number for the investigated highly excited T=3/2 states and demonstrated that studying the structure of neutron-rich exotic nuclei through IAS is a promising approach.
Cite
@article{arxiv.2005.10962,
title = {Observation of T=3/2 Isobaric Analog States in 9Be using p+8Li resonance scattering},
author = {C. Hunt and G. V. Rogachev and S. Almaraz-Calderon and A. Aprahamian and M. Avila and L. T. Baby and B. Bucher and V. Z. Goldberg and E. D. Johnson and K. W. Kemper and A. N. Kuchera and W. P. Tan and I. Wiedenhover},
journal= {arXiv preprint arXiv:2005.10962},
year = {2020}
}
Comments
7 pages, 4 figures, 1 table, submitted to Physical Review C