June 15,2007 Cf-252 measurements with HpGe & neutron sensitive scintillators in coincidence

Experimenters: Doug Wells, Mark Mitchell, Tamuna, Oleksiy

Apparatus: File:Setup-6-15-07.jpg

Data Runs:

1. Paraffin layer of thickness 2x6.3 cm was used as neutron attenuator.

The ungated spectrum of gamma-rays emitted by Cf-252 source is presented in Fig. 1.1.

Spectrum of gamma-rays emitted by Cf-252 source gated by the signal from plastic scintillator BC-420 is shown in Fig. 1.2.

Spectrum of time intervals between signals coming from germanium detector and fast plastic scintillator is represented in Fig. 1.3. Ge-detector signal served as "start" signal.

Total spectrum of Cf-252 obtained using BC-420 plastic scintillator and HAMAMATSU photomultiplier tube.

2.Polyethelen doped with boron of thickness of 2x5 cm was used for neutron shielding.

The ungated spectrum of gamma-rays from Cf-252 source obtained using HPGe detector is shown in Fig. 2.1.