Spinmultipole nuclear matrix elements in the pn quasiparticle randomphase approximation: Implications for β and ββ halflives
Kostensalo, J., & Suhonen, J. (2017). Spinmultipole nuclear matrix elements in the pn quasiparticle randomphase approximation: Implications for β and ββ halflives. Physical Review C, 95(1), Article 014322. https://doi.org/10.1103/PhysRevC.95.014322
Published in
Physical Review CDate
2017Copyright
© 2017 American Physical Society. Published in this repository with the kind permission of the publisher.
Halflives for 148 potentially measurable 2nd, 3rd, 4th, 5th, 6th, and 7thforbidden unique beta transitions
are predicted. To achieve this, the ratio of the nuclear matrix elements (NMEs), calculated by the protonneutron
quasiparticle randomphase approximation (pnQRPA), MpnQRPA, and a twoquasiparticle (twoqp) model, Mqp,
is studied and compared with earlier calculations for the allowed GamowTeller (GT) 1+ and firstforbidden
spindipole (SD) 2− transitions. The present calculations are done using realistic singleparticle model spaces and
Gmatrix based microscopic twobody interactions. In terms of the ratio k = MpnQRPA/Mqp the studied decays fall
into two groups: for GROUP 1, which consists of transitions involving nonmagic nuclei, the ratio turns out to be
k = 0.29 ± 0.15. For GROUP 2, consisting of transitions involving semimagic nuclei, the ratio is 0.5–0.8 for half
of the decays and less than 5 × 10−3 for the other half. The magnitudes of the NMEs for several nuclei of GROUP 2
depend sensitively on the size of the used singleparticle space and the energies of few key singleparticle orbitals
used in the pnQRPA calculation, while no such dependence is found for the transitions involving nuclei of
GROUP 1. Comparing the NME ratios k of GROUP 1 with those of the earlier GT and SD calculations, where
also experimental data are available, the expected “experimental” halflives for the decays between the 0+ ground
state of the eveneven reference nuclei and the J π = 3+,4−,5+,6−,7+,8− states of the neighboring oddodd nuclei
are derived for possible experimental verification. The present results could also shed light to the magnitudes
of the NMEs corresponding to the highforbidden unique 0+ → J π = 3+,4−,5+,6−,7+,8− virtual transitions
taking part in the neutrinoless double beta decays.
...
Publisher
American Physical SocietyISSN Search the Publication Forum
24699985Keywords
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/26528680
Metadata
Show full item recordCollections
Related items
Showing items with similar title or keywords.

Statistical analysis of β decays and the effective value of gA in the protonneutron quasiparticle randomphase approximation framework
Deppisch, Frank F.; Suhonen, Jouni (American Physical Society, 2016)We perform a Markov chain Monte Carlo (MCMC) statistical analysis of a number of measured groundstatetogroundstate single β+/electroncapture and β− decays in the nuclear mass range of A = 62–142. The corresponding ... 
Effective axialvector strength within protonneutron deformed quasiparticle randomphase approximation
Delion, D. S.; Dumitrescu, A.; Suhonen, J. (American Physical Society, 2019)We use the available experimental GamowTeller β− and β+/EC (electroncapture) decay rates between 0+ and 1+ ground states in neighboring eveneven and oddodd nuclei, combined with 2νββ halflives, to analyze the influence ... 
Comparison of Microscopic Interacting Boson Model and Quasiparticle Random Phase Approximation 0νββ Decay Nuclear Matrix Elements
Kotila, Jenni (Frontiers Media SA, 2021)The fundamental nature of the neutrino is presently a subject of great interest. A way to access the absolute mass scale and the fundamental nature of the neutrino is to utilize the atomic nuclei through their rare decays, ... 
Unified description of 2+_1 states within the deformed quasiparticle randomphase approximation
Delion, DoruSabin; Suhonen, Jouni (American Physical Society, 2013)We describe lowlying collective states in deformed eveneven nuclei within a deformed quasiparticle randomphase approximation (dQRPA) by using a singleparticle basis with good angular momentum. The statistical factors, ... 
Neutralcurrent supernovaneutrino cross sections for 204,206,208Pb calculated by Skyrme quasiparticle randomphase approximation
Almosly, Wafa; Carlsson, B. G.; Suhonen, Jouni; Ydrefors, E. (American Physical Society, 2019)The present work constitutes a detailed study of neutralcurrent (NC) supernovaneutrino scattering off the stable eveneven lead isotopes 204,206,208Pb. This is a continuation of our previous work [Almosly et al., Phys. ...