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Germanium Detector Stocklist
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Low-Background Ge
Detectors
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Table 11. Comparison of ORTEC Low-Background Analysis with
that in a Sophisticated Laboratory (NIST). |
LOW-BACKGROUND ANALYSIS
DETECTOR SERIAL NUMBER P33P, GEM-40195, Low Background Detector
REALTIME 100014.40secs, LIVETIME 100000.00secs |
CENTROID
ENERGY
(keV) |
NUCLIDE |
NET
Counts/1000s
(ORTECLAB.) |
NET
Counts/1000s
(NIST) |
|
53.6 |
73*Ge |
1.1 |
0.4 |
|
122.1 |
57*Fe |
0.33 |
0.3 |
|
145.3 |
238U |
0.7 |
Not detected |
|
186.2 |
226Ra |
0.5 |
Not detected |
|
238.6 |
212Pb |
1.3 |
0.5 |
|
295.2 |
214Pb |
0.9 |
0.4 |
|
352.0 |
214Pb |
1.5 |
1.0 |
|
511.03 |
ß+annihilation |
28 |
29 |
|
583.1 |
208Tl |
1.1 |
0.3 |
|
609.3 |
214Bi |
1.6 |
1.0 |
|
661.7 |
137Cs |
0.6 |
Not detected |
|
727.1 |
228Ac |
0.5 |
Not detected |
|
1120.0 |
214Bi |
0.6 |
0.3 |
|
1173.2 |
60Co |
0.3 |
0.6 |
|
1332.5 |
60Co |
0.1 |
0.6 |
|
1460.8 |
40K |
9 |
0.3 |
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Table 12. Counting Rate of Main
Gamma Lines for the 96% ORTEC Germanium Detector at Gran Sasso Facility. (1s
errors
are indicated.) |
| Isotope |
Energy |
Counts/1000 s |
| 238U |
295.2 |
0.22 ±0.03 |
| |
351.9 |
0.44 ±0.04 |
| |
609.3 |
0.33 ±0.03 |
| |
1764 |
0.06 ±0.01 |
| 232Th |
238.6 |
0.08 ±0.02 |
| |
583.1 |
0.04 ±0.01 |
| |
2614.7 |
0.02 ±0.01 |
| 40K |
1460.7 |
0.09 ±0.02 |
| 137Cs |
661.6 |
0.05 ±0.01 |
| 60Co |
1173.2 |
0.04 ±0.01 |
| |
1332.5 |
0.03 ±0.01 |
| 125Sb |
427.9 |
|
| |
600.6 |
|
| |
635.9 |
|
| 106Ru |
621.8 |
|
| |
1050.1 |
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