Review Article
The Use of Low Temperature Detectors for Direct Measurements of the Mass of the Electron Neutrino
Table 4
Comparison of the ECHo, HOLMES, and NuMECS projects.
| | | ECHo | HOLMES | NUMECS |
| | Ho production | (, γ) | (, γ) |
Dy (, ) | | Absorber | Gold | Gold | Nanoporous gold | | Sensor | Au:Er magnetic | TES Mo/Cu | TES Mo/Cu |
| | Present status | | at M1 peak [eV] | 12 | — | 43 (incl. ) | | [s] | 0.13 | — | — | | [Bq] | 0.2 | — | 0.1 |
| | Projected ( eV) | | 100 | 1000 | 4096 | | [eV] | <5 | 1 | — | | [s] | <1 | 1 | — | | [Bq/detector] | 10 | 300 | 100 | | | | — | | [y] | 1 | 3 | 1 | | [eV] | 10 | 1.5 | 1 |
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