Cosmic ray test of BC408 and HpGe coincidence

5:00 pm started overnight coincidence run file name jun21_2007_background002

jun21_2007_background002 was stopped at 11:12 am on June 22

Lead brick with 10.4 cm were used as a shielding for HpGe detector

1. The ungated cosmic ray spectrum obtained from HpGe detector

2. The cosmic ray spectrum obtained from HpGe detector gated by fast plastic scintillator BC408

3.Spectrum of time intervals between signals coming from germanium detector and fast plastic scintillator

4.Cosmic ray spectrum detected in fast plastic scintillator BC408

June, 21, Cosmic background BC408 on top of HpGe