Naslov
Beta-decay rates of r-process nuclei in the relativistic quasiparticle random phase approximation

Autori
Nikšić, Tamara ; Marketin, Tomislav ; Vretenar, Dario ; Paar, Nils ; Ring, Peter

Izvornik
Physical review. C, Nuclear physics (0556-2813) 71 (2005), 1; 014308-15

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Forces in hadronic systems and nuclear effective interactions; B decay relation with nuclear matrix elements and nuclear structure; Nucleosynthesis in novae; supernovae; and other explosive environments

Sažetak
The fully consistent relativistic proton-neutron quasiparticle random phase approximation (PN-RQRPA) is employed in the calculation of -decay half-lives of neutron-rich nuclei in the N50 and N82 regions. A new density-dependent effective interaction, with an enhanced value of the nucleon effective mass, is used in relativistic Hartree-Bogoliubov calculation of nuclear ground states and in the particle-hole channel of the PN-RQRPA. The finite range Gogny D1S interaction is employed in the T = 1 pairing channel, and the model also includes a proton-neutron particle-particle interaction. The theoretical half-lives reproduce the experimental data for the Fe, Zn, Cd, and Te isotopic chains but overestimate the lifetimes of Ni isotopes and predict a stable 132Sn.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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