scholarly journals Supernova neutrino scattering rates reduced by nucleon spin fluctuations: Perturbative limit

1996 ◽  
Vol 54 (4) ◽  
pp. 2784-2792 ◽  
Author(s):  
Georg Raffelt ◽  
David Seckel ◽  
Günter Sigl
Keyword(s):  
Spin Fluctuations ◽  
Nucleon Spin ◽  
Neutrino Scattering ◽  
Supernova Neutrino ◽  
Perturbative Limit ◽  
Scattering Rates

scholarly journals Nucleon Spin Fluctuations and the Supernova Emission of Neutrinos and Axions

1996 ◽  
Vol 76 (15) ◽  
pp. 2621-2624 ◽  
Author(s):  
Hans-Thomas Janka ◽  
Wolfgang Keil ◽  
Georg Raffelt ◽  
David Seckel
Keyword(s):  
Spin Fluctuations ◽  
Nucleon Spin

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 Coupling to spin fluctuations from conductivity scattering rates

2000 ◽  
Vol 62 (13) ◽  
pp. 9054-9058 ◽  
Author(s):  
E. Schachinger ◽  
J. P. Carbotte
Keyword(s):  
Spin Fluctuations ◽  
Scattering Rates

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 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.

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