* Regarding the GAGG detector 
    - adjust the fitting of <sup>152</sup>Gd
    - do a simultaneous fit to estimate the contamination values 
 
  * Next step
    - test the time reconstruction of the DAQ using a pulse generator
    - understand the 7 ms coincidence: 
      - look for coincidence analysis: <sup>211</sup>Pb (beta/gamma) -> <sup>211</sup>Bi (alpha) 
      - do low background gamma spectrometry measurements and look for the low energy gamma rays 
    - take background data with a shorter time window and search for <sup>212</sup>Bi -> <sup>212</sup>Po
    - order a new GAGG wafer and try to operate it as a bolometer with a much better energy resolution to estimate the half-life of <sup>152</sup>Gd 
    - Be can be obtained for the (γ，n) reaction