Orateur
Description
Alpha clustering is a crucial concept to understand nuclear
structures. Alpha particles, which are tightly bound with no excited
states up to Ex ~ 20 MeV, often behave as well established subunits
in nuclei, forming what are known as alpha cluster states.
Of particular interest are alpha condensed states where all alpha
clusters are condensed into the lowest s orbit. Due to this unique
property, these states exhibit very sharp momentum distribution around
zero. As a result, their density distributions spatially expand,
becoming as dilute as about 1/5 compared to normal nuclei.
In our research, we searched for the 5alpha condensed state by
measuring alpha-particle decays from excited states in $^{20}$Ne populated
by inelastic alpha scattering at zero degrees, and found its candidate
states. Additionally, we recently reported candidates for the 6-alpha
condensed state and its excited states with their spin and parity of
2+ and 4+ observed in the $^{12}$C + $^{12}$C resonance scattering.
In the present talk, we will report our experimental findings in the
search for the alpha condensed states in $^{20}$Ne and $^{24}$Mg.
