Submission Date

7-21-2023

Document Type

Paper

Department

Physics & Astronomy

Faculty Mentor

Lew Riley

Comments

Presented during the 25th Annual Summer Fellows Symposium, July 21, 2023 at Ursinus College.

Project Description

We studied single-neuron excitations of the exotic nucleus 71Se with the one-neutron knockout reaction from a 72Se beam at the National Superconducting Cyclotron Laboratory. We measured gamma rays de-exciting states in 71Se using the Gretina gamma-ray tracking array and the momentum of the 71Se reaction product with the S800 Magnetic Spectrograph. We utilize a supercomputer to run multiple simulations and fit them to our gamma-ray spectrum. Using gamma-ray yields and level schemes, we can determine the number of times each excited state was populated by neutron knockout. We deduced cross sections for populating single-neutron excitations of 71Se, and our results provide an experimental test for nuclear shell model theory.

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