Examination of the consistency of the quasiparticle random-phase approximation approach to double- β decay of Ca48
| Autor: | J. Terasaki |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Physical Review C. 97 |
| ISSN: | 2469-9993 2469-9985 |
| DOI: | 10.1103/physrevc.97.034304 |
| Popis: | The nuclear matrix elements (NMEs) of the neutrinoless and two-neutrino double-$\ensuremath{\beta}$ decays of $^{48}\mathrm{Ca}$ are calculated by the quasiparticle random-phase approximation (QRPA) with emphasis on the consistency examinations of this calculation method. The main new examination points are the consistency of two ways to treat the intermediate-state energies in the two-neutrino double-$\ensuremath{\beta}$ NME and comparison with the experimental charge-exchange strength functions obtained from $^{48}\mathrm{Ca}(p,n)$ and $^{48}\mathrm{Ti}(n,p)$ reactions. No decisive problem preventing use of the QRPA approach is found. The obtained neutrinoless double-$\ensuremath{\beta}$ NME adjusted by the ratio of the effective and bare axial-vector current couplings is lowest in those calculated by different groups and close to one of the QRPA values obtained by another group. |
| Databáze: | OpenAIRE |
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