Nuclear levels in 228Th populated in the decay of 228Pa (II)

0+states and collective bands in228Th studied by the (p,Levon1, Graw2, Hertenberger3 et al. 2013Phys. Rev. C269700View full textAdd to dashboardCite

“…Besides 0 + excitations, where the number of reliable assignments could be increased for five states in comparison with the preliminary analysis in publication [4], information on the spins for many other states was obtained. This information was essentially complementary to what was known from publications [2,7]. Some levels are grouped into rotational bands, thus allowing to derive the moment of inertia for some 0 + , 2 + and 0 − , 1 − , 2 − , 3 − bands.…”

“…One of the results of Ref. [7] was the establishment of the one-phonon octupolequadruplet with K π = 0 − , 1 − , 2 − , 3 − states. In this paper we suggested the two-phonon octupole-quadruplet with K π = 0 + , 2 + , 4 + , 6 + states.…”

“…They are listed in Table I. The energies and spins of the levels as derived from this study are compared to known energies and spins, mainly from the published data [2,7]. They are given in the first four columns.…”

“…The most complete information was obtained from the β-decay of 228 Ac reported by Dalmasso et al [2] and from the EC-decay study of 228 Pa by Weber et al [7]. The lowest collective bands in 228 Th were studied in the (α, xnγ)-reaction [8].…”

“…The lowest collective bands in 228 Th were studied in the (α, xnγ)-reaction [8]. A total of 58 levels were reported in [2] and 80 levels were observed in [7] below 2.1 MeV, connected by more than 240 γ-rays that were established in these studies. • .…”