Detection possibility of the pair-annihilation neutrinos from the neutrino-cooled pre-supernova star

Details Detection possibility of the pair-annihilation neutrinos from the neutrino-cooled pre-supernova star Detection possibility of the pair-annihilation neutrinos from the neutrino-cooled pre-supernova star

2003-11-01

arxiv.org/abs/astro-ph/0311012v2

Astropart.Phys. 21 (2004) 303-313

Astronomy and Astrophysics

Astrophysics

18 pages, 2 figures, 5 tables, Astoparticle Physics: accepted for publication

Scientific paper

10.1016/j.astropartphys.2004.02.

The signal produced in neutrino observatories by the pair-annihilation neutrinos emitted from a 20 $M_{\odot}$ pre-supernova star at the silicon burning phase is estimated. The spectrum of the neutrinos with an average energy $\sim$2 MeV is calculated with the use of the Monte Carlo method. A few relevant reactions for neutrinos and anti-neutrinos in modern detectors are considered. The most promising results are from $\bar{\nu}_e + p \longrightarrow n + e^{+}$ reaction. During the Si-burning phase we expect 1.27 neutrons/day/kiloton of water to be produced by neutrinos from a star located at a distance of 1 kpc. Small admixture of effective neutron-absorbers as e.g. NaCl or GdCl$_{3}$ makes these neutrons easily visible because of Cherenkov light produced by electrons which were hit by $\sim$8 MeV photon cascade emitted by Cl or Gd nuclei. The estimated rate of neutron production for SNO and Super-Kamiokande is, respectively, 2.2 and 41 events per day for a star at 1 kpc. For future detectors UNO and Hyper-Kamiokande we expect 5.6 and 6.9 events per day even for a star 10 kpc away. This would make it possible to foresee a massive star death a few days before its core collapse. Importance of such a detection for theoretical astrophysics is discussed.

Affiliated with

Also associated with

No associations

Rating

Detection possibility of the pair-annihilation neutrinos from the neutrino-cooled pre-supernova star does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Detection possibility of the pair-annihilation neutrinos from the neutrino-cooled pre-supernova star, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection possibility of the pair-annihilation neutrinos from the neutrino-cooled pre-supernova star will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-674848