Atomic nuclei decay modes by spontaneous emission of heavy ions

The great majority of the known nuclides with Z>40, including the so-called stable nuclides, are metastable with respect to several modes of spontaneous superasymmetric splitting. A model extended from the fission theory
The great majority of the known nuclides with Z>40, including the so-called stable nuclides, are metastable with respect to several modes of spontaneous superasymmetric splitting. A model extended from the fission theory of alpha decay allows one to estimate the lifetimes and the branching ratios relative to the alpha decay for these natural radioactivities. From a huge amount of systematic calculations it is concluded that the process should proceed with maximum intensity in the trans-lead nuclei, where the minimum lifetime is obtained from parent-emitted heavy ion combinations leading to a magic (208Pb) or almost magic daughter nucleus. More than 140 nuclides with atomic number smaller than 25 are possible candidates to be emitted from heavy nuclei, with half-lives in the range of 1010–1030 s: 5He, 8–10Be, 11,12B, 12–16C, 13–17N, 15–22O, 18–23F, 20–26Ne, 23–28Na, 23–30Mg, 27–32Al, 28–36Si, 31–39P, 32–42S, 35–45Cl, 37–47Ar, 40–49 K, 42-51. . .Ca, 44–53 Sc, 46–53Ti, 48–54V, and 49–55 Cr. The shell structure and the pairing effects are clearly manifested in these new decay modes.
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Metadaten
Author:Dorin N. Poenaru, Marin Ivaşcu, Aurel Săndulescu, Walter Greiner
URN:urn:nbn:de:hebis:30-29373
Document Type:Article
Language:English
Date of Publication (online):2006/06/30
Year of first Publication:1985
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2006/06/30
Source:Phys. Rev. C 32, 572~V581 (1985), ©1985 The American Physical Society, http://link.aps.org/abstract/PRC/v32/p572
HeBIS PPN:187371598
Institutes:Physik
Dewey Decimal Classification:530 Physik
PACS-Classification:21.60.Ev Collective models
23.90.+w Other topics in radioactive decay and in-beam spectroscopy (restricted to new topics in section 23)
27.80.+w 190 (less-than-or-equal-to) A (less-than-or-equal-to) 219
27.90.+b A (greater-than-or-equal-to) 220
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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