Detection of radioactive 236Pu decay with emission of 28Mg nuclei

Ogloblin, A. A.; Venikov, N.I.; Lisin, S.K.; Pirozhkov, S.V.; Pchelin, V.A.; Rodionov, Yu.F.; Semochkin, V.M.; Shabrov, V.A.; Shvetsov, I.K.; Shubko, V.M.; Tretyakova, S.P.; Mikheev, V.L.

doi:10.1016/0370-2693(90)90092-k

Cited by 31 publications

(14 citation statements)

References 10 publications

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“…Cluster radioactivity is an exotic process. The partial half-lives are very long and vary in a wide range from 10 11 to 10 26 s. Branching ratios to the dominant α decay in these nuclei are very small and fall between 10 −9 and 10 −16 . Moreover, spontaneous fission is also a competing decay channel in some heavy cluster emitters [27].…”

Section: Introductionmentioning

confidence: 94%

“…This discovery represented a milestone in the description of nuclear radioactivity as it bridged the gap between the α emission radioactivity and the standard fission reaction. Since then, cluster radioactivity (CR) has been found in twelve eveneven isotopes [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] and seven odd-even isotopes (see, e.g., references in Refs. [22,23]) in the actinide region.…”

Section: Introductionmentioning

confidence: 99%

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Microscopic description of cluster radioactivity in actinide nuclei

2011

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Cluster radioactivity is the emission of a fragment heavier than an α particle and lighter than mass 50. The range of clusters observed in experiments goes from 14 C to 32 Si while the heavy mass residue is always a nucleus in the neighborhood of the doubly-magic 208 Pb nucleus. Cluster radioactivity is described in this paper as very asymmetric nuclear fission. A new fission valley leading to a decay with large fragment mass asymmetry matching the cluster radioactivity products is found. The mass octupole moment is found to be more convenient than the standard quadrupole moment as the parameter driving the system to fission. The mean-field Hartree-Fock-Bogoliubov theory with the phenomenological Gogny interaction has been used to compute the cluster emission properties of a wide range of even-even actinide nuclei from 222 Ra to 242 Cm, where emission of the clusters has been experimentally observed. Computed half-lives for cluster emission are compared with experimental results. The noticeable agreement obtained between the predicted properties of cluster emission (namely, cluster masses and emission half-lives) and the measured data confirms the validity of the proposed methodology in the analysis of the phenomenon of cluster radioactivity. A continuous fission path through the scission point has been described using the neck parameter constraint.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Microscopic description of cluster radioactivity in actinide nuclei

2011

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“…Already measured are the emission of C, Ne, Mg and Si nuclei. A review of the experimental status up to 1989 is given in [9,10], for the latest results see [11][12][13]26]. Quantitative arguments for the emission of fragments heavier than e-particles have been given for the first time by Sandulescu et al in 1980 [14].…”

Section: Extension To Exotic Decaysmentioning

confidence: 98%

“…Formula (12) indicates that, compared to a-spectroscopic factors S~, the spectroscopic factor for heavier fragments should scale like (S,) "/4. The comparison with our microscopic calculations shows [20] that the scaling is much better described by Sbul k = (Sa)(a-1)/3 (bulk spectroscopic factor).…”

Section: J=lmentioning

confidence: 99%

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From ?-decay to exotic decays ? a unified model

Blendowske

Fließbach

Walliser

1991

Z. Physik A - Hadrons and Nuclei

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The possibility of extending the microscopic e-decay theory to exotic decay modes is investigated. It is argued that the strong Pauli distortions in the antisymmetrized wave function of the open channel favour this possibility. The microscopic description can be reduced to a onebody picture; the structure information is then contained in a spectroscopic factor. Existing microscopic calculations from ~-up to 160-decays justify a simple unified bulk formula for the spectroscopic factor. In this way a semiemp]rical formula for the decay constant is obtained depending on 1 parameter only (for odd and even nuclei, respectively). This formula describes all decay modes in a unified way and yields an excellent reproduction of the known exotic decay rates. It is thus well-suited for the unambiguous prediction of yet unmeasured decay constants. PACS: 23.60. + e; 29.90. + w; 21.60.Gx

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Clusters in nuclear physics: From nuclear molecules to cluster radioactivities

Greiner

1992

Nuclear Physics Concepts in the Study of Atomic Cluster Physics

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Detection of radioactive 236Pu decay with emission of 28Mg nuclei

Cited by 31 publications

References 10 publications

Microscopic description of cluster radioactivity in actinide nuclei

Microscopic description of cluster radioactivity in actinide nuclei

From ?-decay to exotic decays ? a unified model

Clusters in nuclear physics: From nuclear molecules to cluster radioactivities

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