Evidence for two-dimensional ising structure in atomic nuclei

A = 3 Clustering in Nuclei

“…Hence pointing out that density distribution of (n, p) and of (h, t, and α) are giving unambiguos support of this concept of building blocks, we agree with Mac Gregor's classification [2]. However, we go beyond his concept, in pointing out that within (h, t, and α) blocking, there is actually another intrinsic blocking, that of (h, t) as being different from α-nucleus.…”

“…Here, while not pursuing on the lines of their respective models -that of close packing of Pauling [22] and Ising Model for Mac Gregor [2] we give them credit for recognizing that A = 3 nuclei -h and t be condidered to be playing a more fundamental role in understanding the atomic nucleus.…”

“…Noting this categorization we can now appreciate now Mac Gregor's classification of assuming n, p, h, t, and α as building blocks of nuclei [2]. Meaning in his model n, p, h, t, and α are not treated as nuclei, but from these are treated basic building blocks from which all the other nuclei are made up of these only.…”

“…"For its very large binding energy, the α-particle appears in some sense, as a "fully saturated nuclei". Hence it seems reasonable to consider clusters as constituting a complete basis set for reproducing atomic nuclei" [2]. He assumed a novel two dimensional Ising model for nuclei.…”

“…But again it is experiments -which we have already discussed, which keep on observing that h-and t-both exist as primary building blocks inside nuclei. Again we refer to Mac Gregor's [2] extensive discussion of various empirical evidences including presence of h-and t-(along with α) as preformed clusters deep inside nuclei.…”