Analysis of survival probability of superheavy nuclei

Adamian, G. G.; Antonenko, N. V.; Иванова, С.П.; Scheid, W.

doi:10.1103/physrevc.62.064303

Cited by 78 publications

(74 citation statements)

References 22 publications

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“…The relatively large reported production cross section, 5 pb, is typical of the higher cross sections associated with hot fusion reactions compared to cold fusion reactions (Figure 1) for the synthesis of Z > 112. It is these same cross sections, which challenge our understanding because current theoretical predictions of the survival probabilities in these reactions [12] would not give cross sections of this magnitude. For example, Armbruster [13] using the best available data on the capture cross sections, the probability of evolving from the contact configuration to the completely fused system and the survival probabilities, estimated a evaporation residue production section for the reaction of 231 MeV 48 Ca + 238 U → 286 112 → 283 112 + 3n of 50 fb.…”

Section: Introductionmentioning

confidence: 97%

Search for the production of element 112 in the48Ca+238Ureaction

et al. 2002

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Section: Introductionmentioning

confidence: 97%

Search for the production of element 112 in the48Ca+238Ureaction

et al. 2002

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mentioning

confidence: 99%

“…The yield of ERs is then determined by the probability W sur of surviving statistical fission decay from the compact configuration. Conceptually the ER cross section may therefore be written [6] ER cap P CN W sur ;(1)here P CN and W sur are weighted averages over the low angular momenta leading to ER formation. Capture may well be described adequately in the coupled-channels framework, which has been successful in describing the fusion of lighter systems [7].…”

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confidence: 99%

Severe Inhibition of Fusion by Quasifission in Reactions FormingT220h

2002

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Evaporation residue cross sections have been measured following the fusion of 16O with 204Pb, forming the compound nucleus 220Th. These are compared with existing data for the same compound nucleus formed following fusion reactions with 40Ar, 48Ca, 82Se, and 124Sn projectiles. At energies where the reduced cross sections of xn evaporation residues would be expected to be the same for all reactions, those for the heavier projectiles are typically a factor of 10 smaller than those for 16O. This inhibition is attributed to strong competition of quasifission with fusion at the low angular momenta associated with evaporation residue formation.

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“…Should element 118 be synthesized, it will be interesting to compare these predictions with the observations. In a similar vein, there have been a number of papers [23,24,25,26,27,28,29,30,31,32,33,34,35,36,37] dealing with the synthesis of element 118 and the reported production cross section, which was unexpectedly large. Special mention should be made of the work of Smolańczuk [23,30] which prompted the experimental measurement [1].…”

Section: Introductionmentioning

confidence: 99%

Cross-section limits for the 208 Pb(86 Kr,n)293118 reaction

Gregorich¹,

Ginter²,

Loveland³

et al. 2003

Eur. Phys. J. A

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In April-May, 2001, the previously reported experiment to synthesize element 118 using the 208 Pb( 86 Kr,n) 293 118 reaction was repeated. No events corresponding to the synthesis of element 118 were observed with a total beam dose of 2.6 x 10 18 ions. The simple upper limit cross sections (1 event) were 0.9 and 0.6 pb for evaporation residue magnetic rigidities of 2.00 T m and 2.12 T m, respectively. A more detailed cross section calculation, accounting for an assumed narrow excitation function, the energy loss of the beam in traversing the target and the uncertainty in the magnetic rigidity of the Z=118 recoils is also presented. Re-analysis of the primary data files from the 1999 experiment showed the reported element 118 events are not in the original data. The current results put constraints on the production cross section for synthesis of very heavy nuclei in cold fusion reactions.

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Analysis of survival probability of superheavy nuclei

Cited by 78 publications

References 22 publications

Search for the production of element 112 in the48Ca+238Ureaction

Search for the production of element 112 in the48Ca+238Ureaction

Severe Inhibition of Fusion by Quasifission in Reactions FormingT220h

Cross-section limits for the 208 Pb(86 Kr,n)293118 reaction

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