Lifetime measurements are commonly used to unravel the nature and properties of nuclear states, as they are closely related to transition probabilities, which provide information on the nuclear wave functions. The experiment presented here aimed to study the interplay of spherical (0 ℏω) and intruder (2 ℏω) configurations in the low-lying states of isotopes on the edge of the N=20 island of...
The region around doubly magic $^{48}$Ca is a cornerstone of our understanding of nuclear structure, characterized by the appearance of subshell closures at N=32 and 34 [1], and by the gradual disappearance of N=28 shell closure below Z=20 [2]. However, several experimental findings have challenged this understanding. Large charge and matter radii were found in $^{51-53}$Ca [3,4], showing...
The experiment 22.101 is a joint experiment to address four different physics cases devoted to studying the physics of the $\nu g_{9/2}$ beyond $N = 40$. These are aimed at investigating:
• Collectivity and seniority conservation in the $\nu g_{9/2}$ orbital
• Shape coexistence and octupole vibrations in $^{68}$Ni
• Island of inversion and the role of intruders at $N ∼ 40$
For these...
Coexistence between spherical and deformed shapes is largely found in and near semi-magic or doubly-magic nuclei.
The region between the doubly-magic $^{48}$Ca and $^{56}$Ni nuclei is predicted to present phenomena of shape coexistence, although experimental information on E0 and E2 transition strengths connecting deformed and spherical configurations remains rather limited. In $^{52}$Cr...
