The Korean Physical Society 06130 22, Teheran-ro 7-gil, Gangnam-gu, Seoul, Republic of Korea 610 Representation : Suk Lyun HONG TEL: 02-556-4737 FAX: 02-554-1643 E-mail : webmaster@kps.or.kr Copyright(C) KPS, All rights reserved.
30 May 2022 to 4 June 2022
Virtual Seoul
Asia/Seoul timezone

Reactor antineutrino flux and spectrum at RENO

Not scheduled
5m
Virtual Seoul

Virtual Seoul

Poster Reactor neutrinos Poster

Description

The RENO experiment reports measured flux and energy spectrum of reactor electron antineutrinos ($\overline{\nu}_e$) from the six reactors at Hanbit Nuclear Power Plant. The measurements use 966 094 (116 111) $\overline{\nu}_e$ candidate events with a background fraction of 2.39% (5.13%), acquired in the near (far) detector, from August 2011 to March 2020. The inverse beta decay (IBD) yield is measured as (5.852$ \pm $0.094$) \times 10^{-43}$cm$^2$/fission, corresponding to 0.941 $\pm$ 0.015 of the prediction by the Huber and Mueller (HM) model. A reactor $\overline{\nu}_e$ spectrum is obtained by unfolding a measured IBD prompt spectrum. The obtained neutrino spectrum shows a clear excess around 6 MeV relative to the HM prediction. The obtained reactor $\overline{\nu}_e$ spectrum will be useful for understanding unknown neutrino properties and reactor models. The observed discrepancies suggest the next round of precision measurements and modification of the current reactor $\overline{\nu}_e$ models. In this presentation, we will make discussion on the 6 MeV excess associated with the reactor fuel burning.

Collaboration RENO

Primary author

Seok-Gyeong Yoon (Seoul National University)

Presentation materials