Observation of nucleon clusters in the spontaneous decay of234U

Tretyakova, S.P.; Zamyatnin, Yu. S.; Kovantsev, V.N.; Korotkin, Yu.S.; Mikheev, V.L.; Timofeev, G.A.

doi:10.1007/bf01299687

Cited by 14 publications

(12 citation statements)

References 8 publications

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“…the 24 Ne cluster is preformed faster in these parents as compared to other clusters. For the case of 234 U parent the cluster radioactivity is observed for 24,26 [62], but the cluster formation probability is maximum for 26 Ne cluster compared to other decays. We have computed the half life for these cluster emissions and it is found that the lowest half life time is for 26 [63] cluster decays are experimentally observed, i.e the 26 Ne cluster emission has the lower half life.…”

Section: Resultsmentioning

confidence: 89%

“…Coulomb and proximity potential model [32] and is found that the lowest half life time is for 14 and 26. In the case of 232 Th and 234,236 U parents the 24,26 Ne clusters are experimentally detected [59][60][61][62] but 26 Ne has the maximum preformation probability compared to 24 Ne cluster. Again the parents 230 Th, 231 Pa, 232,233,235 U have the maximum cluster formation probability for 24 Ne cluster as compared to 26 Ne cluster, i.e these clusters are formed very fast in these parents as compared to other clusters.…”

Section: Resultsmentioning

confidence: 91%

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Cluster formation probability in the trans-tin and trans-lead nuclei

2010

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Within our fission model, the Coulomb and proximity potential model (CPPM) cluster formation probabilities are calculated for different clusters ranging from carbon to silicon for the parents in the trans-tin and trans- lead regions. It is found that in trans-tin region the 12^C, 16^O, 20^Ne and 24^Mg clusters have maximum cluster formation probability and lowest half lives as compared to other clusters. In trans-lead region the 14^C, 18, 20^O, 23^F, 24,26^Ne, 28,30^Mg and 34^Si clusters have the maximum cluster formation probability and minimum half life, which show that alpha like clusters are most probable for emission from trans-tin region while non-alpha clusters are probable from trans-lead region. These results stress the role of neutron proton symmetry and asymmetry of daughter nuclei in these two cases.Comment: 20 pages, 6 figure

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 91%

Cluster formation probability in the trans-tin and trans-lead nuclei

2010

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“…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%

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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“…3, and Fig. 4 the experimental data for logarithmic half lives [4,[12][13][14][15][16][17][18][19] have been plotted against the mass numbers of parent nuclei along with the results of the present calculations for zero angular momentum of the fragments. In all the figures, the open circles depict the experimental data while the continuous line with solid circle represents the present calculations (MSAFM).…”

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confidence: 99%

Spontaneous heavy cluster emission rates using microscopic potentials

Basu¹

2002

Phys. Rev. C

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The nuclear cluster radioactivities have been studied theoretically in the framework of a microscopic superasymmetric fission model (MSAFM). The nuclear interaction potentials required for binary cold fission processes are calculated by folding in the density distribution functions of the two fragments with a realistic effective interaction. The microscopic nuclear potential thus obtained has been used to calculate the action integral within the WKB approximation. The calculated half lives of the present MSAFM calculations are found to be in good agreement over a wide range of observed experimental data.Comment: 4 pages, 4 figure

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Observation of nucleon clusters in the spontaneous decay of234U

Cited by 14 publications

References 8 publications

Cluster formation probability in the trans-tin and trans-lead nuclei

Cluster formation probability in the trans-tin and trans-lead nuclei

Microscopic description of cluster radioactivity in actinide nuclei

Spontaneous heavy cluster emission rates using microscopic potentials

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