Submission Date


Document Type



Physics & Astronomy

Faculty Mentor

Lew Riley


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.

Available for download on Sunday, July 21, 2024

Open Access

Available to all.

Included in

Nuclear Commons