Doubly magic nucleus

These fissioning nuclei (such as 8tP°i2-211> formed by reaction of Bi209 and a deuteron) have a nearly spherical normal-state structure, resembling that of the doubly magic nucleus seP m208, with an outer core of 16 spherons and an inner core of 4 spherons, shown in Fig. 6. The nucleus is excited, with vibrational energy about 25 Mev (for bismuth bombard-... 

Ni, the doubly magic nucleus with equal numbers of protons and neutrons, which later decays via 56Co into 56Fe. 

One isotope of element 114, with 184 neutrons, is predicted to be another doubly magic nucleus, and is therefore expected to sit right in the middle of an island of stability in the space of superheavy nuclei (Fig. 13). Nuclear scientists suspect that it may have a half-life of as much as several years. Element 114 has thus become a kind of Holy Grail for element-makers. If it turns out to be stable, this would show that these researchers are not necessarily doomed to search for increasingly fleeting glimpses of ever heavier and less stable new elements. There might be undiscovered elements out there that you can (in principle, at least) hold in your hand. 

First theoretical estimates [7-10] of decay half-lives around the doubly magic, spherical nucleus Z = 114, N = 184 revealed a topology as depicted in Fig. 1 [10]. Three major decay modes were considered spontaneous fission, a decay, and decay or electron capture. Spontaneous fission half-lives were found to peak sharply at the doubly magic nucleus, descending by orders of magnitude within short distances in the Z-N plane, thus causing the island-like shape. In contrast, half-lives for a decay should decrease rather uniformly with increasing... 

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