Assembly, testing, and installation of mPMT photosensor for the Water Cherenkov Test Experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10510518" target="_blank" >RIV/00216208:11320/25:10510518 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=c-mUGC5Nd6" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=c-mUGC5Nd6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nima.2025.170903" target="_blank" >10.1016/j.nima.2025.170903</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Assembly, testing, and installation of mPMT photosensor for the Water Cherenkov Test Experiment

Popis výsledku v původním jazyce

This Letter reports the precise measurement of the reactor antineutrino spectrum and flux based on the full dataset of 4.7 x 10(6) inverse-beta-decay candidates collected at Daya Bay near detectors. Expressed in terms of the inverse-beta-decay yield per fission, the antineutrino spectra from all reactor fissile isotopes and the specific U-235 and Pu-239 isotopes are measured with 1.3%, 3%, and 8% uncertainties, respectively, near the 3 MeV spectrum peak in reconstructed energy, reaching the best precision in the world. The total antineutrino flux and isotopic U-235 and Pu-239 fluxes are precisely measured to be 5.84 +/- 0.07, 6.16 +/- 0.12, and 4.16 +/- 0.21 in units of 10(-43) cm(2)/fission. These measurements are compared with the Huber-Mueller model, the reevaluated conversion model based on the Kurchatov Institute measurement, and the latest summation model (SM2023). The Daya Bay flux shows good consistency with the Kurchatov Institute and SM2023 models but disagrees with the Huber-Mueller model. The Daya Bay spectrum, however, disagrees with all model predictions.

Název v anglickém jazyce

Assembly, testing, and installation of mPMT photosensor for the Water Cherenkov Test Experiment

Popis výsledku anglicky

This Letter reports the precise measurement of the reactor antineutrino spectrum and flux based on the full dataset of 4.7 x 10(6) inverse-beta-decay candidates collected at Daya Bay near detectors. Expressed in terms of the inverse-beta-decay yield per fission, the antineutrino spectra from all reactor fissile isotopes and the specific U-235 and Pu-239 isotopes are measured with 1.3%, 3%, and 8% uncertainties, respectively, near the 3 MeV spectrum peak in reconstructed energy, reaching the best precision in the world. The total antineutrino flux and isotopic U-235 and Pu-239 fluxes are precisely measured to be 5.84 +/- 0.07, 6.16 +/- 0.12, and 4.16 +/- 0.21 in units of 10(-43) cm(2)/fission. These measurements are compared with the Huber-Mueller model, the reevaluated conversion model based on the Kurchatov Institute measurement, and the latest summation model (SM2023). The Daya Bay flux shows good consistency with the Kurchatov Institute and SM2023 models but disagrees with the Huber-Mueller model. The Daya Bay spectrum, however, disagrees with all model predictions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Výzkum základních stavebních kamenů hmoty s využitím špičkových technologií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nuclear Instruments &amp; Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment

ISSN

0168-9002

e-ISSN

1872-9576

Svazek periodika

1081

Číslo periodika v rámci svazku

AUG 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

170903

Kód UT WoS článku

001548094400001

EID výsledku v databázi Scopus

2-s2.0-105012594092