Coupled-channel treatment of isobaric analog resonances in (p,p') capture processes

I. J. Thompson; G. Arbanas

doi:10.1016/j.nds.2014.04.063

Coupled-channel treatment of isobaric analog resonances in (p,p') capture processes

I. J. Thompson, G. Arbanas

Nuclear Data

Lawrence Livermore National Laboratory

Research output: Contribution to journal › Article › peer-review

Abstract

With the advent of nuclear reactions on unstable isotopes, there has been a renewed interest in using isobaric analogue resonances (IAR) as a tool for probing the nuclear structure. The position and width of isobaric analogue resonances in nucleon-nucleus scattering are accurate and detailed indicators of the positions of resonances and bound states with good single-particle characters. We report on implementation within our coupled-channels code FRESCO of the charge-exchange interaction term that transforms an incident proton into a neutron. Isobaric analog resonances are seen as peaks in γ-ray spectrum when the proton is transformed into a neutron at an energy near a neutron bound state. The Lane coupled-channels formalism was extended to follow the non-orthogonality of this neutron channel with that configuration of an inelastic outgoing proton, and the target being left in a particle-hole excited state. This is tested for ²⁰⁸Pb, for which good (p,p'γ) coincidence data exists.

Original language	English
Pages (from-to)	298-300
Number of pages	3
Journal	Nuclear Data Sheets
Volume	118
Issue number	1
DOIs	https://doi.org/10.1016/j.nds.2014.04.063
State	Published - Apr 2014

Funding

Acknowledgements: The authors are indebted to Frank Dietrich (LLNL) and Arthur Kerman (MIT) for useful suggestions. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344, and by Oak Ridge National Laboratory under Contract DE-AC05-00OR22725, in the TORUS collaboration. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes.

Funders	Funder number
U.S. Department of Energy
Lawrence Livermore National Laboratory	DE-AC52-07NA27344
Oak Ridge National Laboratory	DE-AC05-00OR22725

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10.1016/j.nds.2014.04.063

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Coupled-channel treatment of isobaric analog resonances in (p,p') capture processes

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