Author/Authors :
Agnello، نويسنده , , M. and Botta، نويسنده , , E. and Bressani، نويسنده , , T. and Bruschi، نويسنده , , M. and Bufalino، نويسنده , , S. and De Napoli، نويسنده , , M. and Feliciello، نويسنده , , A. and Fontana، نويسنده , , A. and Giacobbe، نويسنده , , B. and Lavezzi، نويسنده , , L. and Raciti، نويسنده , , G. and Rapisarda، نويسنده , , E. and Rotondi، نويسنده , , A. and Sbarra، نويسنده , , C. and Sfienti، نويسنده , , C. and Zoccoli، نويسنده , , A.، نويسنده ,
Abstract :
A new generation of high-resolution hypernuclear γ -spectroscopy experiments using high-purity germanium (HPGe) detectors is presently designed for the FINUDA spectrometer at DA Φ NE , the Frascati Φ -factory, and for PANDA, the p – p ¯ hadron spectrometer at the future FAIR facility. In both spectrometers the HPGe detectors have to be operated in strong magnetic fields. In this paper we report on a series of measurements performed on a HPGe detector inserted in a magnetic field of intensity up to 2.5 T, the highest ever reached for operations with a HPGe, and with different orientations of the detectorʹs axis with respect to field direction. A significant worsening of the energy resolution was found, but with a moderate loss of the efficiency. The most relevant features of the peak shapes, described by bi-Gaussian functions, are parametrized in terms of field intensity and energy: this allows to correct the spectra measured in magnetic field and to recover the energy resolution almost completely.
