Simulated Neutrino Signals of Low and Intermediate Energy Neutrinos on Cd Detectors

Abstract

Neutrino-nucleus reactions cross sections, obtained for neutrino energies in the range εν ≤ 100 − 120 MeV (low-and intermediate-energy range), which refer to promising neutrino detection targets of current terrestrial neutrino experiments, are presented and discussed. At first, we evaluated original cross sections for elastic scattering of neutrinos produced from various astrophysical and laboratory neutrino sources with the most abundant Cd isotopes 112 Cd, 114 Cd and 116 Cd. These isotopes constitute the main material of the COBRA detector aiming to search for neutrinoless double beta decay events and neutrino-nucleus scattering events at the Gran Sasso laboratory (LNGS). The coherent ν-nucleus reaction channel addressed with emphasis here, dominates the neutral current ν-nucleus scattering, events of which have only recently been observed for a first time in the COHERENT experiment at Oak Ridge. Subsequently, simulated ν-signals expected to be recorded at Cd detectors are derived through the application of modern simulation techniques and employment of reliable neutrino distributions of astrophysical ν-sources (as the solar, supernova and Earth neutrinos), as well as laboratory neutrinos (like the reactor neutrinos, the neutrinos produced from pion-muon decay at rest and the β-beam neutrinos produced from the acceleration of radioactive isotopes at storage rings as e.g. at CERN).

Concept of Coherence in Neutrino and Antineutrino Scattering off Nuclei

“…where the th moment is defined as (138) The authors [66] performed calculations within the current deformed shell model (DSM). The form factors of the 127 I and 133 Cs nuclei were calculated using the effective interaction [80] and the space of states of spherical orbitals , , , , and on the basis of the filled 100 Sn core.…”

“…In addition to the already discussed COHERENT experiment, which uses beams of "accelerator" (anti)neutrinos 19 from the decay of stopped pions produced in a spallation neutron source (SNS), the experiments to be discussed below are mainly supposed to use antineutrino beams from nuclear reactors or natural neutrino sources, such and the Sun or a supernova. Modern experiments with reactor and accelerator (anti)neutrinos are reviewed, for example, in [137][138][139][140]. Interest in the CEνNS research was also demonstrated at the European Spallation Source [141].…”