Title: Double Beta Decay
1Double Beta Decay
21.Double Beta Decay???
- 1-1.??
- 1-2.Majorana???
- 1-3.Double Beta Decay???
- 1-4.Double Beta Decay????????
31-1.??
- Neutrino-less?
- Double Beta Decay???
- ?????!
41-2.Majorana???
- Majorana?? Dirac??
- ????? ?? ???
- ???????? ?????
- Condition Condition
- ???? ????
- ???????????
51-3.DBD???
- mode(Standard Model)
-
- diagram
61-3.DBD???
- Condition
- 1??ß???????????????
Energy
??
N(A,Z-2)
DBD
N(A,Z)
71-3.DBD???
- DBD???
- 1.beta decay beta decay
- 2.electron capture beta decay
- 3. electron capture electron capture
81-3.DBD???
mode( Neutrino-less ) diagram
91-3.DBD???
- Standard Model?????????
- 1.?????????
-
- ???????????
- 2.?????????
- ??????????
101-3.DBD???
- Neutrino-less Double Beta Decay???
- 1.Majorana??
- 2.??????helicity????
- Massive???????
111-4.Double beta decay????????
- Majorana?????
- ????????
- ?????????????
122.????????????????????????????
- 2-1.CdTe(????????)
- 2-2.??????
- 2-3.Coplanar grid technique
- 2-4.Flash Analog Digital Converter
- 2-5.????????
- 2-6.???????????
- 2-7.??????
132.????????????????????????????
??????????????????(Q?)
Q????????????????????????
142-1.CdTe(????????)
????
- ??????????????
- ????????????????
- ???????
- ????????????
- ???????????
?????
152-2.??????
??
???
???
???
????????????????????????????????????????
????????????????????????????
????????????????????????????
162-3.Coplanar grid technique
????Grid
????Grid
????Grid
CdTe
?????
- ??????????2??Grid???????????Grid??????????
17???????????????????
??1
??????
e
-
??2
??????
CdTe
???
???
??2
Voltage
??1
Voltage
??????
??????
??
??
18???????????????????
??1
??????
e
-
??2
??????
CdTe
???
???
??????????Grid?????
??2
Voltage
??1
Voltage
Voltage
-
??????
??????
??
??
??
????????????????????
???????????????????????????
19???????
- Cs(????)????????CdTe????????????????????
CH1(high bias)
CH2(low bias)
CH2-CH1
202-4.Flash Analog Digital Converter
??FADC?????
Voltage
???????ADC??
??
??????????????
212-4. Analog Digital Converter
??FADC?????
Voltage
FADC??
??
?????????????????
222-5.????????
a52.2665 b1.32146 c14.6032 ???9.04911
a43.3118 b1.35264 c14.5578 ???9.29151
Cs(????)?????????
a35.8562 b1.62626 c14.2246 ??? 11.43272
CH1????130V????????(b/c)???? c????????????
232-6.???????????
???
(511keV)
????????
(511keV)
????????????????
- CdTe(??????)????????
- 2??NaI??????????????
24CdTe?4??NaI???
4????2??NaI?????????????? CdTe????????????? ??????
????
252-7.??????
26????
- 33??????????
- 10?????????????
27????
- 10????neutrino-less double beta decay?
- 0????
283.????(CdTe)
- Grid tech????
- hole?????????????
- Grid Tech?????????(?????)!
293.????(CdTe)
- ??????????
- ?????????????????
- But CdTe???????????????
- ????????
- ??????????
- ????????
- Bias?????
303.????(DBD)
- Neutrino-less Double Beta Decay?????
- ???33????
- ???????????????
31- Thank you for your listening!