Instabilities against exotic cluster decays in stable'' nuclei with [ital Z] and [ital N] in the neighborhood of spherical and deformed closed shells

Journal Article · Mon Feb 01 04:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.561· OSTI ID:6889310

Gupta, R K; Singh, S; Puri, R K; Scheid, W ^[1]

---

1. Physics Department, Panjab University, Chandigarh 160014 (India) Institut fuer Theoretische Physik, Justus-Liebig-Universitaet, 6300 Giessen (Germany)

The possible exotic cluster decay modes of some stable'' nuclei in the region 50[lt][ital Z][lt]82 are calculated using a preformed cluster model. The predicted half-life times for certain cluster decays of [sub 56][sup 120]Ba[sub 64] and [sub 80][sup 186]Hg[sub 106] nuclei, which lie in the neighborhood of the spherical magic shells [ital Z]=50 and 82 and the deformed magic shell [ital N]=108, are interesting cases of possible instabilities present in regions of stable'' nuclei. These are the [sup 12]C and [sup 16]O decays of [sup 120]Ba and the [sup 8]Be decay of [sup 186]Hg, whose half-life times are predicted to be [similar to]10[sup 22], 10[sup 26], and 10[sup 28] s, respectively. The last case is an exciting new possibility of cluster radioactivity with a deformed daughter nucleus. Experimentally, however, both parent nuclei are short lived and their suggested cluster decays cannot be observed. In any case, the present study invokes further work to look for other similar instabilities in various regions of stable'' nuclei. It is possible that some of these decays are measurable and can be used to obtain the related new nuclear structure effects. The effects of reinforcement of shell gaps for nuclei with weak spherical closed shell at [ital Z]=64 and deformation starting to begin at [ital N][similar to]90 are also discussed.

• OSTI ID: 6889310
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663210* -- Ground-State Radioactivity-- (1992-)
663560 -- Nuclear Mass Ranges-- A=90-149-- (1992-)
663570 -- Nuclear Mass Ranges-- A=150-189-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA DECAY
ALPHA DECAY RADIOISOTOPES
BARIUM 120
BARIUM ISOTOPES
BERYLLIUM 8
BERYLLIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CARBON 12
CARBON ISOTOPES
CLUSTER MODEL
DAYS LIVING RADIOISOTOPES
DECAY
DEFORMED NUCLEI
ELECTRON CAPTURE RADIOISOTOPES
EVEN-EVEN NUCLEI
HALF-LIFE
HEAVY NUCLEI
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MERCURY 186
MERCURY ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEI
OXYGEN 16
OXYGEN ISOTOPES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SHELL MODELS
STABILITY
STABLE ISOTOPES
YEARS LIVING RADIOISOTOPES