Measurement of the free neutron lifetime using the neutron spectrometer on NASA's Lunar Prospector mission

Wilson, Jack T.; Lawrence, David J.; Peplowski, Patrick N.; Eke, Vincent R.; Kegerreis, Jacob A.

Abstract

We use data from the Lunar Prospector Neutron Spectrometer to make the second space-based measurement of the free neutron lifetime finding τ n = 887 ± 14 stat + 7 − 3 syst s, which is within 1 σ of the accepted value. This measurement expands the range of planetary bodies where the neutron lifetime has been quantified from space, and by extending the modeling to account for nonuniform elemental composition, we mitigated a significant source of systematic uncertainty on the previous space-based lifetime measurement. This modeling moves space-based neutron lifetime measurement towards the ultimate goal of reducing the magnitude of the systematics on a future space-measurement to the level of those seen in laboratory-based experiments.

Citation

Wilson, J. T., Lawrence, D. J., Peplowski, P. N., Eke, V. R., & Kegerreis, J. A. (2021). Measurement of the free neutron lifetime using the neutron spectrometer on NASA's Lunar Prospector mission. Physical Review C, 104(4), Article 045501. https://doi.org/10.1103/physrevc.104.045501

• Journal Article Type: Article
• Acceptance Date: Aug 2, 2021
• Online Publication Date: Oct 13, 2021
• Publication Date: 2021-10
• Deposit Date: Dec 8, 2021
• Publicly Available Date: Dec 8, 2021
• Journal: Physical Review C
• Print ISSN: 2469-9985
• Electronic ISSN: 2469-9993
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 104
• Issue: 4
• Article Number: 045501
• DOI: https://doi.org/10.1103/physrevc.104.045501
• Public URL: https://durham-repository.worktribe.com/output/1220599