Intertechnique Silicon Detectors

Characterization of silicon semiconductor detectors for charged particle detection.

Detectors:

  • Size: 3,09 cm x 3,90 cm, Plug: 0,49 cm  (width 0,72 cm)

Devices:

  • Silena HV-Power-Supply 7715P (0,12 kV)
  • Ortec Amplifier 671 (Shaping Time: 2µs; Coarse Gain: 50, GAUSSIAN, unipolar)
  • Preamplifier ZFK VV5/27
  • Silena ADC 7423UHS (LLD: 10|0; ULD:0|10; Offset: 0; Conversion Gain : 4k / 8k)
  • Ortec Ethernim ADC Interface
  • PC 3000-3308 (Software: Maestro (Ortec), SATAN (GSI))
  • Vacuum Chamber (D00469)

Source:

  • Number: EC221
  • Peaks (and transition probability):
    • Pu-239: 5105 keV (11.5%); 5143 keV (15.1%); 5155 keV (73.4%)
    • Am-241: 5388 keV (1.4%); 5443 keV (12.8%); 5486 keV (85.2%)
    • Cm-244: 5763 keV (23.3%); 5805 keV (76.7%)

Measurements:

  • red histogram: Conversion Gain: 4K; distance to source: about 2,5 cm; measuring time 600 s
  • blue histogram: Conversion Gain: 8K; distance to source: about 12 cm; measuring time 2400 s

Results:

  • Intertechnique 7796

FWHM: Pu: 30,1±0,4  keV - Am:27.9±0,4  keV - Cm:27,6±0,4  keV

  • Intertechnique 7799

FWHM: Pu:33,1±0,4 keV - Am: 31,6±0,4 keV - Cm:30,8±0,4 keV

  • Intertechnique 7801

FWHM: Pu:50,4±0,7 keV - Am: 51,7 ±0,7 keV - Cm: 51,6 ±0,7 keV