## Jutta Escher | 19-ERD-017

### Executive Summary

We will develop a predictive theory for inelastic nuclear scattering and use this new capability to determine an important nuclear reaction cross section that elucidates the origin of the elements. Our theory will enable reaction measurements for a wide range of radioisotopes currently not available, and lead to more reliable data evaluations for applications in nuclear energy, nonproliferation, and stockpile stewardship.

### Publications, Presentations, and Patents

Chimanski, E. V., et al. 2020a. "Combining State-of-Art Nuclear Structure Theory with Modern Reaction Descriptions: Nucleon-Induced Reactions." Annual Meeting of the APS Far West Section, October 2020 (online). LLNL-ABS-814350

——— 2020b. "Improving Inelastic Scattering Descriptions: Reaction Theory for Deformed Targets with the QRPA." Nuclear Structure 2020, Santa Cruz, CA, July 2020. LLNL-ABS-808038

Dreyfuss, A. C., et al. 2020. "Probing Alpha Clustering for X-ray Burst Nucleosynthesis in a Symmetry-Adapted Framework." Fall Meeting of the APS Division of Nuclear Physics. October/November 2020 (online). LLNL-ABS-812034

Gorton, O. C. and J. E. Escher, 2020. "Cross Sections for Neutron Induced Reactions from Surrogate Measurements: Another Examination of the Weisskopf-Ewing Approximation." Fall Meeting of the APS Division of Nuclear Physics. October/November 2020 (online). LLNL-ABS-811952

Mercenne, A., et al. 2020. "A New Ab Initio Approach for Nuclear Reactions Based on the Symmetry-Adapted No-Core Shell Model." GANIL Topical Meeting: Nuclear Structure and Reactions for the 2020s. Caen, France, July 2020. LLNL-ABS-751669