Publication Type
Journal
Journal Name
Physical Review D
Publication Date
Volume
111
Issue
3
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.
