Lifetime Measurements of the Neutron-RichN=30IsotonesCa50andSc

Abstract

The lifetimes of the first excited states of the N = 30 isotones (50)Ca and (51)Sc have been determined using the Recoil Distance Doppler Shift method in combination with the CLARA-PRISMA spectrometers. This is the first time such a method is applied to measure lifetimes of neutron-rich nuclei populated via a multinucleon transfer reaction. This extends the lifetime knowledge beyond the f_{7/2} shell closure and allows us to derive the effective proton and neutron charges in the fp shell near the doubly magic nucleus (48)Ca, using large-scale, shell-model calculations. These results indicate an orbital dependence of the core polarization along the fp shell.

Large-amplitude pairing fluctuations in atomic nuclei

“…We observe shifts in the 2D calculations with respect to the 1D with the same tendencies as the nuclei discussed above. In 50 Ca we observe 064311-11 [52][53][54] Ca. In principle, one would expect an increase in collectivity with growing neutron number.…”

“…7 the same potential energy surfaces in the q, δ plane for the isotopes 50 Ca, 52 Ca, and 54 Ca, only for the PN-VAP and PN-VAP + PNAMP cases. Here we can study the evolution of the energy surfaces as a function of the neutron number.…”

“…1 we show solutions of Eq. (5) calculated in the PN-VAP + PNAMP approach in 2D for the nucleus 54 Cr for different number, N δ , of δ values (3, 5, 10, or 19) in the interval 0 to 4.5. We can conclude comparing these results that ten values of δ for each deformation is a good election for our calculations to guarantee a good energy convergence.…”

Multinucleon transfer reactions in the Ar40+Pb208 system

“…This is the reason why multinucleon transfer reactions have recently been used as a competitive tool for the production of neutron-rich nuclei in the vicinity of the light partner (see for example Refs. [10][11][12][13]). …”

Transition probabilities in neutron-rich Se80,82 and the role of the νg9/2Litzinger1, Blazhev2, Dewald3 et al. 2018Phys. Rev. CSelf Cite5000View full textAdd to dashboardCite

“…3(a). For a gate on large TKEL values (red or light gray) the 5 us to construct γ -ray spectra with different feeding patterns for energetically lower states [36,37]. As a consequence, the experimentally observed time behavior (decay curve) of those transitions is clearly affected; see .…”