M. Moukaddam "SPICE, a new in-beam electron spectrometer at TRIUMF-ISAC"

mercredi 11 avr. 2018, 10:45 → 13:00 Europe/Paris

A new ancillary detector, SPICE (SPectrometer for Internal Conversion Electrons), has been constructed and commissioned for use with radioactive ion beams in conjunction with the TIGRESS HPGe spectrometer to perform combined in-beam gamma-ray and internal-conversion-electron spectroscopy at TRIUMF's ISAC-II facility. The main feature of SPICE is high detection efficiency over a wide range of electron energies from 100 to 3500~keV, with an effective reduction of beam-induced backgrounds, making it a powerful tool to measure internal conversion coefficients and E0 transitions in atomic nuclei. The first tests demonstrated the effectiveness of the basic design concept of SPICE in background suppression, even before detailed analysis techniques are applied to the data.
After an introduction on electron spectroscopy, I will explain the details of the design concept of SPICE and its main features, followed by the detector simulations. SPICE performance and preliminary data analysis from a recent experiment will also be presented.