Estimations of the particle
flux irradiating Ge detectors of SPI
Cosmic-ray protons impinging of the INTEGRAL observatory create secondary
particles (n and p+) that induce radioactivity in SPI spectrometer
and damage Ge detectors. Several estimations have been done (see Jean,
1996, Thèse de l’Université Paul Sabatier and Diallo et al.,
1996, "Proceedings of the second INTEGRAL workshop", ESA publication division,
SP-382).
Results of recent (1998) estimations done with Monte-Carlo simulations
are presented here:
-
neutron spectrum impinging on Ge detectors of
SPI - (Diallo & Jean estimations)
-
proton spectrum impinging on Ge detectors of
SPI - (Diallo & Jean estimations).
-
neutron spectrum impinging on Ge detectors
of SPI - (Jean with a cut at 3 GeV for p+ spectrum & Diallo)
-
neutron spectrum impinging on Ge detectors
of SPI as a function of cosmic ray p+ energy cut - (Jean)
-
particle (p+ and n) integral spectra (Jean)