Review Article
The Use of Low Temperature Detectors for Direct Measurements of the Mass of the Electron Neutrino
Table 2
Comparison of the MANU [
116] and MIBETA [
117] experiments.
| | | MANU | MIBETA |
| | Source/absorber | Metallic Re | AgReO4 | | Sensor | Ge-NTD | Si implanted thermistor | | Number of detectors | 1 | 8 | | Total mass [g] | 1572 (Re) | 2174 (AgReO4) | | Measuring time [h] | ≈2800 | ≈8700 | | Total activity [Bq] | 1.1 (above 350 eV) | 1.17 (above 700 eV) | | Energy resolution [eV] | 96 (at 5.9 keV) | 28.5 (average at Re end-point) | | Rise time [s] | ≈1000 | 492 (average 10–90%) |
| | Statistics | (above 420 eV) | (above 700 eV) | | Pile-up fraction | — | | | [eV] | | | | [ y] | | | | [eV2] | | | | 90% [eV] | 19 | 15 | | Background [c/eV/day] | | |
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