1. Plan with new HPGe detectors
Kang WoonGu
Sejong University

2. CANBERRA HPGe Detector Assembly
ORTEC HPGe detector

3. Shielding Structure with HPGe
Lead shielding
copper shielding

4. Canberra HPGe detector

5. Energy Resolution of the HPGe Detector
 measured using gamma-ray’s source(Co60/Cs137/Ba133)
 shown increasing with gamma-ray’s energy
The resolution at 1.332MeV
 similar compare company measured and ours measured

6. BackGround with New HPGe
BackGround Measured
Canberra
ortec
Efficiency
DAQ Setup  FADC
Resolution Confirm
DBD,etc

7. Energy Resolution and DAQ Setup
Diagram of the experiment setup
FADC400
Data
Acquisition
HPGe
Pre-Amp
ORTEC
671
Amplifier
T(us)
h(mV)
■ the present data taken using gammavision
 data taken using FADC and ortec acquisition system
 data analysis will using the ROOT
■ Energy Resolution of HPGe detector
We want to confirm good energy resolution of HPGe Detector using a
400MHz fast-ADC(FADC) and ORTEC-671 Amplifier
■ Diagram of the experiment setup
the pre-amp signal : high energy signal (>500keV)
671amp output : low energy signal (< 500keV)

8. Energy Resolution with ORTEC HPGe
the good energy resolution was measured at coarse gain of 10
Also, we will confirm good energy resolution in case of canberra hpge

9. ECEC and EC/β+ of 92Mo EC/EC Q-value=1,650keV, EC/β+ Q-value=628keV
92Mo nucleus is double EC and beta plus EC isotope
EC/EC Q-value=1,650keV, EC/β+ Q-value=628keV
(A, Z) + 2e- -> (A, Z-2 ) keV(Q-value)
Abundance = 92Mo: 14.84%, 100Mo: 9.63%
We will perform a double beta decay experiment
using HPGe detector and CaMoO4 crystal

10. Double Beta Decay Experiment
Pre-Amp
x100
x10 in
CaMoO4 crystal
Signal
FADC400
Data
Acquisition
Ch0
ECEC
HPGe
Q-Value
Ch1
ORTEC
Amp
Ch2 in
out
Ch3
ECEC and ECβ+ decay experiment using a CaMoO4 crystal
92Mo + 2e+ -> 92Zr +36.0keV KeV(Q-value)

11. Plane █ BackGround level
->If new bg level less than old hpge b.g level
█ Efficiency  using mixed source
█ DAQ Test and Resolution Confirm
█ DBD Experiment with new HPGe detector