eprintid: 27881
rev_number: 15
eprint_status: archive
userid: 4973
dir: disk0/00/02/78/81
datestamp: 2020-02-13 06:43:15
lastmod: 2020-02-13 12:35:40
status_changed: 2020-02-13 06:43:15
type: doctoralThesis
metadata_visibility: show
creators_name: Almazan Molina, Helena
title: Evaluation of the Neutron Detection Efficiency in the Stereo Reactor Neutrino Experiment
subjects: 530
divisions: 130001
divisions: 851340
adv_faculty: af-13
abstract: The Stereo detector is measuring electron antineutrinos from the research reactor at the Institut Laue-Langevin (Grenoble, France). Located at ∼10m from its core and with a segmented neutrino target, Stereo is searching for light sterile neutrino oscillations as a possible explanation for the Reactor Antineutrino Anomaly observed in 2011. An accurate determination of the detection efficiency of the correlated signal created by the electron antineutrino interaction called inverse beta decay (IBD) is needed to reach that goal. More concretely, a good understanding of the detection efficiency for the IBD neutrons is required, in both data and simulation, since it is one of the dominant systematic uncertainties of the Stereo analysis. An AmBe neutron source has been deployed throughout the different sub-volumes of the detector, and has been used to study the properties of the neutron detection with high accuracy. Among others, the selection cuts, neutron vertex dependencies and neutron capture models have been specially investigated along this thesis. The AmBe source has been used to test the modelisation of the gamma cascade emitted after a neutron capture on gadolinium (nuclei present in the liquid scintillator). This thesis is focused on studying the most relevant properties in terms of data-to-simulation correction coefficients, providing thus a crucial input in the oscillation analysis of the Stereo experiment.
date: 2020
id_scheme: DOI
id_number: 10.11588/heidok.00027881
ppn_swb: 1689950714
own_urn: urn:nbn:de:bsz:16-heidok-278818
date_accepted: 2020-02-05
advisor: HASH(0x564e1c4dfa08)
language: eng
bibsort: ALMAZANMOLEVALUATION2020
full_text_status: public
place_of_pub: Heidelberg
citation:   Almazan Molina, Helena  (2020) Evaluation of the Neutron Detection Efficiency in the Stereo Reactor Neutrino Experiment.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/27881/1/Dissertation_HAlmazan.pdf