Review Article
Neutrinoless Double-Beta Decay
Table 4
Relevant parameters and features of the “magnificent nine” double-beta decay candidates.
| Double-beta candidate | -value (MeV) | Phase space (y−1) | Isotopic abundance (%) | Enrichable by centrifugation | Indicative cost normalized to Ge |
| Ca | 4.27226 (404) | | 0.187 | No | — | Ge | 2.03904 (16) | | 7.8 | Yes | 1 | Se | 2.99512 (201) | | 9.2 | Yes | 1 | Zr | 3.35037 (289) | | 2.8 | No | — | Mo | 3.03440 (17) | | 9.6 | Yes | 1 | Cd | 2.81350 (13) | | 7.5 | Yes | 3 | Te | 2.52697 (23) | | 33.8 | Yes | 0.2 | Xe | 2.45783 (37) | | 8.9 | Yes | 0.1 | Nd | 3.37138 (20) | | 5.6 | No | — |
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