Half-life, branching-ratio, andQ-value measurement for the superallowed0+→0+β+

Observation of Low- and High-Energy Gamow-Teller Phonon Excitations in Nuclei

“…We saw that the 0.611 MeV GT state in 42 Sc collects 80% of the total GT strength in the region up to 12 MeV. The GT transition to this state has a large BðGTÞ value of 2.2, which can be deduced from the small log ft value of 3.25 of the isospin analogous GT transition in the 42 Ti β decay to 42 Sc [36]. Therefore, in the sense that this low-energy GT state has the collective nature and carries most of the observed GT strength, it is comparable to the high-energy GTR in heavy N > Z nuclei.…”

High-resolution study of Gamow-Teller excitations in theCa42(He3,t)Fujita1, Fujita2, Adachi3 et al. 2015Phys. Rev. C4391090View full textAdd to dashboardCite

“…Recently, two sets of accurate 42 Ti β-decay data became available [19,41] at the fragment separator and trap facilities. Using the β-decay half-life T 1/2 , branching ratio BR, and decay Q value (Q EC value) listed in Table V, the B(GT) value for the transition from the g.s.…”

Progress of precision measurements at JYFLTRAP

“…Also, the 25 Al(p,γ) 26 Si reaction threshold value was improved since the Q EC value of 26 Si was measured with JYFLTRAP [21]. Although the precision of the value was improved tenfold and the value shifted about 1σ, there was only marginal change to the overall reaction rate.…”

“…To add new candidates to the set of well-known superallowed beta emitters, the half-life and the branching ratio of 26 Si and 42 Ti were also measured. In these studies, JYFLTRAP was applied to prepare isotopically pure ion bunches [25,26].…”