scholarly journals Coherent and Incoherent Neutral Current Scattering for Supernova Detection

2012 ◽  
Vol 2012 ◽  
pp. 1-18 ◽  
Author(s):  
P. C. Divari
Keyword(s):  
Cross Sections ◽  
Neutral Current ◽  
Neutrino Energy ◽  
Total Cross Sections ◽  
Neutrino Scattering ◽  
Neutrino Detection ◽  
Supernova Neutrino ◽  
Dirac Distribution ◽  
The Individual ◽  
Event Rates

The total cross sections as well as the neutrino event rates are calculated in the neutral current neutrino scattering off40Ar and132Xe isotopes at neutrino energies (Ev<100 MeV). The individual contribution coming from coherent and incoherent channels is taking into account. An enhancement of the neutral current component is achieved via the coherent (0gs+→0gs+) channel which is dominant with respect to incoherent (0gs+→Jf) one. The response of the above isotopes as a supernova neutrino detection has been considered, assuming a two parameter Fermi-Dirac distribution for the supernova neutrino energy spectra. The calculated total cross sections are tested on a gaseous spherical TPC detector dedicated for supernova neutrino detection.

scholarly journals Cross Sections of Charged Current Neutrino Scattering off132Xe for the Supernova Detection

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
P. C. Divari
Keyword(s):  
Cross Sections ◽  
Random Phase ◽  
Muon Decay ◽  
Charged Current ◽  
Quasiparticle Random Phase Approximation ◽  
Total Cross Sections ◽  
Neutrino Scattering ◽  
Dirac Distribution ◽  
Event Rates ◽  
Two Parameter

The total cross sections as well as the neutrino event rates are calculated in the charged current neutrino and antineutrino scattering off132Xe isotope at neutrino energiesEv<100 MeV. Transitions to excited nuclear states are calculated in the framework of quasiparticle random-phase approximation. The contributions from different multipoles are shown for various neutrino energies. Flux-averaged cross sections are obtained by convolving the cross sections with a two-parameter Fermi-Dirac distribution. The flux-averaged cross sections are also calculated using terrestrial neutrino sources based on conventional sources (muon decay at rest) or on low-energy beta-beams.

scholarly journals Studying the coherent channel of neutral current ν-nucleus interaction

2019 ◽  
Vol 21 ◽  
pp. 177
Author(s):  
V. Tsakstara ◽  
T. S. Kosmas
Keyword(s):  
Cross Sections ◽  
Neutral Current ◽  
Random Phase ◽  
Neutrino Energy ◽  
Energy Distributions ◽  
Quasi Particle ◽  
Neutrino Scattering ◽  
Supernova Neutrino ◽  
Power Law Distributions ◽  
Beta Beam

Original cross-sections calculations for neutral current neutrino scattering on 40Ar isotope are performed in the context of the quasi-particle random phase approximation (QRPA) by utilizing realistic two-nucleon forces. The incoming neutrino energy range adopted, εν ≤ 100 MeV, covers the supernova neutrinos, the low-energy beta-beam-neutrinos and the pion-muon stopped neutrino-beams existing or planned to be conducted at future neutron spallation sources. Subsequently, are the original cross sections convoluted with various supernova neutrino-energy distributions such as the two-parameter Fermi-Dirac and the power law distributions. The folded cross sections are obtained for various values of the parameters of these neutrino energy distributions corresponding to different supernova scenarios. One of the main purposes of this work is to explore the response of the 40Ar isotope as supernova neutrino detector.

scholarly journals Coherent neutrino scattering off the 48Ti nucleus

2012 ◽  
Vol 20 ◽  
pp. 104
Author(s):  
D. K. Papoulias ◽  
T. S. Kosmas
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Energy Region ◽  
Decomposition Method ◽  
Form Factors ◽  
Momentum Dependence ◽  
Neutrino Scattering ◽  
Neutrino Detection ◽  
Supernova Neutrino ◽  
Coherent Neutrino Scattering

The method of fractional occupation probabilities of the orbits is adopted in order to obtain nuclear form factors to be used for reliable cross sections calculations of the dominant coherent neutrino-nucleus reaction channel. To this purpose, the multipole decomposition method of Donnelly-Walecka is employed. The response of the 48Ti nucleus in solar and Supernova neutrino detection is investigated through our realistic nuclear structure cross sections calculations, based on the solution of the BCS equations. The present results indicate that the momentum dependence of the nuclear form factors cannot be neglected from the cross section, especially in the energy region of Supernova neutrinos (or for neutrinos having higher energies), because differences of even orders of magnitude may occur.

scholarly journals Cross sections for the neutral current νe - 116Cd scattering reaction

2020 ◽  
Vol 16 ◽  
pp. 97
Author(s):  
K. G. Balasi ◽  
T. S. Kosmas ◽  
P. C. Divari ◽  
V. C. Chasioti
Keyword(s):  
Cross Sections ◽  
Neutral Current ◽  
Random Phase ◽  
Initial Energy ◽  
Electron Neutrino ◽  
Excitation Energies ◽  
Quasi Particle ◽  
Neutrino Scattering ◽  
Supernova Neutrino ◽  
Nuclear Response

The cross sections for neutrino scattering off the 116Cd nucleus have been computed by utilizing the Quasi-particle Random Phase Approximation (QRPA). An- gular and initial energy dependence of the neutrino-nucleus cross sections have been calculated at low and intermediate electron neutrino energies up to 100 MeV. By solving the QRPA equations and fixing the appropriate parameters the lowest lying excitation energies spectrum was reproduced. The contributions from multipole ex- citations was examined. The obtained results could be used for studying the nuclear response of this isotope to supernova neutrino spectra.

scholarly journals Neutrino scattering off the 95,97Mo isotopes

2020 ◽  
Vol 19 ◽  
pp. 60
Author(s):  
K. G. Balasi ◽  
T. S. Kosmas
Keyword(s):  
Cross Sections ◽  
Neutral Current ◽  
Wave Functions ◽  
Neutrino Scattering ◽  
Dirac Distribution ◽  
Supernova Neutrinos ◽  
The Cross ◽  
Two Parameter ◽  
Phonon Model

In this work we perform calculations of the cross sections for neutral-current neutrino scattering off the 95,97Mo isotopes. Both the incoherent and coherent con- tributions to the cross sections are considered. The wave functions of the initial and final nuclear states are constructed in the context of the quasiparticle phonon model (MQPM). The response of the aformentioned nuclei to supernova neutrinos are computed by folding the obtained cross sections with a two-parameter Fermi-Dirac distribution.

scholarly journals Neutrino scattering off the stable even-even Mo isotopes

2019 ◽  
Vol 18 ◽  
pp. 25
Author(s):  
K. G. Balasi ◽  
T. S. Kosmas
Keyword(s):  
Axial Vector ◽  
Reaction Rates ◽  
Neutrino Energy ◽  
Energy Spectra ◽  
Neutrino Scattering ◽  
Intermediate Energies ◽  
Supernova Neutrino ◽  
Dirac Distribution ◽  
Two Parameter ◽  
Mo Isotopes

A systematic study of neutrino-nucleus reaction rates at low and intermediate energies are presented and discussed, focusing on the even-even Mo isotopes. Contributions coming from both the vector and axial-vector components of the corresponding hadronic currents have been included. The response of these detectors to supernova neutrino is also studied, by exploiting the above results and utilizing the folding procedure assuming a two parameter Fermi-Dirac distribution for the supernova neutrino energy-spectra.

scholarly journals Coherent and incoherent channels of neutrino-nucleus reactions

2020 ◽  
Vol 16 ◽  
pp. 75
Author(s):  
P. C. Divari ◽  
T. S. Kosmas
Keyword(s):  
Cross Sections ◽  
Neutral Current ◽  
Charged Current ◽  
Preliminary Results ◽  
Scattering Cross ◽  
Neutrino Detection ◽  
Intermediate Energies ◽  
Nucleus Scattering ◽  
Scattering Cross Sections

Inelastic neutrino-nucleus scattering cross sections at low and intermediate energies are investigated for currently interesting nuclei employed in neutrino-detection experiments. This is an extension to charged current processes of our previous QRPA calculations referred to neutral current neutrino/antineutrino-nucleus reactions. Our preliminary results for the reactions 56Fe(νe, e−)56Co and 40Ar(νe, e−)40K compare rather well with similar calculations obtained in the context of continuum RPA.

scholarly journals Cross section calculations for neutrino-nucleus reactions at low and intermediate energies.

2020 ◽  
Vol 15 ◽  
pp. 249
Author(s):  
V. Ch. Chasioti ◽  
T. S. Kosmas ◽  
P. Divari
Keyword(s):  
Cross Sections ◽  
Neutral Current ◽  
Axial Vector ◽  
Random Phase ◽  
Neutrino Energy ◽  
Reaction Cross ◽  
Neutrino Experiment ◽  
Final State ◽  
Quasi Particle ◽  
Intermediate Energies

Inelastic neutrino-nucleus reaction cross sections are studied focusing on the neutral current processes. Particularly, we investigate the angular and initial neutrino-energy dependence of the differential and integrated cross sections for low and intermediate energies of the incoming neutrino (or antineutrino). Contributions coming from both, the vector and axial-vector components of the corresponding hadronic currents have been included. The initial and final state nuclear wave-functions have been calculated in the context of the Quasi-particle Random Phase Approximation (QRPA) tested on the reproducibility of the low-lying energy spectrum (up to about 5 MeV) of the studied nuclei. The results presented here refer to the nuclear isotopes 16O and 98Mo. As it is well known, O plays a significant role in supernova evolution phenomena and Mo is used as a target in the MOON neutrino experiment at Japan.

scholarly journals Measurement of the charged-current electron (anti-)neutrino inclusive cross-sections at the T2K off-axis near detector ND280

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
K. Abe ◽  
◽  
N. Akhlaq ◽  
R. Akutsu ◽  
A. Ali ◽  
...  
Keyword(s):  
Cross Sections ◽  
Electron Neutrino ◽  
Neutrino Beam ◽  
Charged Current ◽  
Total Cross Sections ◽  
Neutrino Scattering ◽  
Near Detector ◽  
Current Electron ◽  
Inclusive Electron ◽  
Selection Of

Abstract The electron (anti-)neutrino component of the T2K neutrino beam constitutes the largest background in the measurement of electron (anti-)neutrino appearance at the far detector. The electron neutrino scattering is measured directly with the T2K off-axis near detector, ND280. The selection of the electron (anti-)neutrino events in the plastic scintillator target from both neutrino and anti-neutrino mode beams is discussed in this paper. The flux integrated single differential charged-current inclusive electron (anti-)neutrino cross-sections, dσ/dp and dσ/d cos(θ), and the total cross-sections in a limited phase-space in momentum and scattering angle (p > 300 MeV/c and θ ≤ 45°) are measured using a binned maximum likelihood fit and compared to the neutrino Monte Carlo generator predictions, resulting in good agreement.

Cross sections for neutral-current neutrino scattering on208Pb

2002 ◽  
Vol 66 (5) ◽  
Author(s):  
N. Jachowicz ◽  
K. Heyde ◽  
J. Ryckebusch
Keyword(s):  
Cross Sections ◽  
Neutral Current ◽  
Neutrino Scattering
Sign in / Sign up

Export Citation Format

Share Document