- By:
- Bryan, Christopher D; Conant, Andrew J; Deichert, Geoffrey G; Galindo-Uribarri, Alfredo ; Heffron, Blaine A; Lu, Xiaobin ; Mueller, Paul E; Venegas Vargas, Diego C
- Journal Name:
- Physical Review D
- Page Number:
- 32014-32014
- Volume:
- 111
- Issue Number:
- 3
- Publication Date:
- March 17, 2025
- View DOI Listing:
- https://doi.org/10.1103/PhysRevD.111.032014
Abstract
The PROSPECT-I detector has several features that enable measurement of the direction of a compact neutrino source. In this paper, a detailed report on the directional measurements made on electron antineutrinos emitted from the High Flux Isotope Reactor is presented. With an estimated true neutrino (reactor to detector) direction of 𝜙=40.8°±0.7° and 𝜃 =98.6 °±0.4 °, the PROSPECT-I detector is able to reconstruct an average neutrino direction of 𝜙 =39.4 °±2.9 ° and 𝜃 =97.6 °±1.6 °. This measurement is made with approximately 48 000 inverse beta decay signal events and is the most precise directional reconstruction of reactor antineutrinos to date.
