Use of phosphate glass detectors for study of curium-242 cluster radioactivity

Tretyakova, S.P.; Bonetti, R.; Golovchenko, A.N.; Guglielmetti, A.; Hussonnois, M.; Ilić, R.; Kobzev, A.P.; Mikheev, V.L.; Oglobin, A.; Poli, G. L.; Пономаренко, В. А.; Timofeeva, O. V.; Shigin, V.A.; Skvarč, J.

doi:10.1016/s1350-4487(99)00086-4

Cited by 3 publications

(4 citation statements)

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“…In the case of 232-235 U, 236 Pu the maximum preformation is obtained for 28 Mg cluster. For 236 U parent 28,30 [63]) and in the case of 238 Pu parent 28,30 [64]) but the highest peaks in cluster formation probability is obtained for 30 Mg as compared to 28 Mg cluster. i.e.…”

Section: Resultsmentioning

confidence: 89%

“…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. As we compared the cluster formation probability of these clusters it is found that the 26 Ne cluster has the larger preformation probability value.…”

Section: Resultsmentioning

confidence: 99%

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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: 99%

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

2010

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“…This rare phenomenon was first discussed theoretically in 1980 by Săndulescu, Poenaru and Greiner [1]. Experimental confirmation came four years later with the observation of the 14 C spontaneous emission from 223 Ra, by Rose and Jones [2]. To date, about 35 cluster decay modes have been observed for nuclei in the trans-lead region of 221 < A < 242 and 87 < Z < 96, with daughter nuclei in the neighborhood of 208 Pb.…”

Section: Introductionmentioning

confidence: 95%

“…To date, about 35 cluster decay modes have been observed for nuclei in the trans-lead region of 221 < A < 242 and 87 < Z < 96, with daughter nuclei in the neighborhood of 208 Pb. The observed emitted clusters include 14 C [2], 15 N [3], 18,20 O [4, 5], 22,24,25,26 Ne [6-10], 23 F [11], 28,30 Mg [6,[12][13][14], and 32,34 Si [13,15]. In principle, these decays are characterized with long partial half-lives lying between 10 11 s and 10 28 s, and very small branching ratios relative to α-decay in the range from 10 −9 and 10 −16 [16].…”

Section: Introductionmentioning

confidence: 99%

Optimum orientation versus orientation averaging description of cluster radioactivity

Seif

Ismail

Refaie

et al. 2016

J. Phys. G: Nucl. Part. Phys.

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Background:The deformation of the nuclei involved in the cluster decay of heavy nuclei affect seriously their half-lives against the decay. Purpose:We investigate the description of the different decay stages in both the optimum orientation and the orientation-averaged pictures of the cluster decay process. Method:We consider the decays of 232,233,234 U and 236,238 Pu isotopes. The quantum mechanical knocking frequency and penetration probability based on the Wentzel-Kramers-Brillouin approximation are used to find the decay width. Results:We found that the orientation-averaged decay width is one or two orders of magnitude less than its value along the non-compact optimum orientation. The difference between the two values increases with decreasing the mass number of the emitted cluster. Correspondingly, the extracted preformation probability based on the averaged decay width increases with the same orders of magnitude compared to its value obtained considering the optimum orientation. The cluster preformation probabilities (S c ) obtained in the two considered schemes give more or less comparable agreement with the Blendowske-Walliser (BW) formula based on the preformation probability of ( ) obtained from the orientation-averaging scheme. All the obtained results, including those obtained in the optimum-orientation scheme, deviate substantially from the BW law based on obtained using the optimumorientation scheme. Conclusion:In order to account for deformations of the participating nuclei, it is more relevant to calculate the decay width by averaging over the different possible orientations of the participating deformed nucleus, rather than considering the corresponding non-compact optimum orientation.

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First observation of spontaneous fission of232U

et al. 2000

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By using a low-sensitivity glass track detector in planar geometry we measured the decay rate of 232 U by spontaneous fission to be SF ϭ(8.6Ϯ1.8)ϫ10 Ϫ24 s Ϫ1 , corresponding to a half-life T 1/2 ϭ(8.1Ϯ1.7)ϫ10 22 s. The inconsistency and consistency of this result with previous work is discussed, and spontaneous fission half-lives are compared with cluster decay ones for the various uranium isotopes measured up to now. PACS number͑s͒: 23.70.ϩj, 27.90.ϩb 232

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Use of phosphate glass detectors for study of curium-242 cluster radioactivity

Cited by 3 publications

References 3 publications

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

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

Optimum orientation versus orientation averaging description of cluster radioactivity

First observation of spontaneous fission of232U

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