Interplay between tensor force and deformation in even–even nuclei

Abstract

In this work we study the effect of the nuclear tensor force on properties related with deformation. We focus on isotopes in the Mg, Si, S, Ar, Sr and Zr chains within the Hartree-Fock-Bogoliubov theory using the D1ST2a Gogny interaction. Contributions to the tensor energy in terms of saturated and unsaturated subshells are analyzed. Like-particle and proton-neutron parts of the tensor term are independently examinated. We found that the tensor term may considerably modify the potential energy landscapes and change the ground state shape. We analyze too how the pairing characteristics of the ground state change when the tensor force is included.

Measurement of lifetimes in Fe62,64,Co61,63 , and Klintefjord1, Ljungvall2, Görgen3 et al. 2017Phys. Rev. C

“…2. Gamma rays detected with AGATA in coincidence with 62,64 Fe, 61,63 Co, and 59 Mn, summed over all six distances, are shown in Fig. 3.…”

“…FIG. 3. γ -ray spectra in coincidence with ions identified as 59 Mn, 62,64 Fe, and 61,63 Co, summed over all six distances. Decay curves R(x) for the level of interest and for observed feeding transitions, R f (x), were constructed according to…”

“…Experimental B(E2) values for the neutron-rich iron isotopes are only known for the 2 + 1 → 0 + 1 transitions [8,25,26], but not for higher-lying transitions. For the cobalt isotopes, lifetimes were reported for the 9/2 − and 11/2 − states in 61 Co [36], the 3/2 − and 9/2 − states in 63 Co [16], the 11/2 − state in 63 Co [18], and the 11/2 − and 13/2 − states in 65 Co [18]. For the manganese isotopes some transition strengths are known from Coulomb excitation of 61 Mn [37], and lifetimes were very recently reported for the 7/2 − , 9/2 − , and 11/2 − states in 63 Mn [38].…”

“…Here, we report on the first RDDS lifetime measurement with AGATA 024312-2 coupled to VAMOS++ at GANIL. New lifetimes were measured in 62,64 Fe, 61,63 Co, and 59 Mn by using multinucleon transfer reaction between 238 U projectiles and 64 Ni target nuclei. The article is organized as follows: Experimental details and the data analysis are described in Secs.…”

Infinite matter properties and zero-range limit of non-relativistic finite-range interactions

“…[20,28,35]. In the present work we will thus consider such an extended form of the Gogny interaction [36] …”