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Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114)

Akashrup Banerjee, D. J. Hinde, M. Dasgupta, J. Sadhukhan, E. C. Simpson, D. Y. Jeung, C. Simenel, B. M. A. Swinton-Bland, E. Williams, L. T. Bezzina, I. P. Carter, K. J. Cook (+16 others)
2021 Physics letters / B 820  

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Measurements of mass and angular distributions have been made for fission-like outcomes in reactions forming isotopes of flerovium (Z=114), using 48 Ca, 50 Ti, and 54 Cr projectiles. The dominant fast quasifission process, which masks the presence of fusion-fission, has minimum yield at the most backward angles, where the sensitivity to fusion-fission is thus highest. In fitting the backward angle mass spectra, only weak evidence for a component of super-asymmetric fission was found, but a
more » ... ymmetric fission component was consistently required for the 48 Ca + 244 Pu reaction, giving upper limit to the fusion probabilities P C N of ∼10 −2 , ∼5 times lower than previous results. P C N for the 50 Ti reaction was lower than 48 Ca, whilst no evidence of fusion-fission was found for the 54 Cr reaction.
doi:10.15120/gsi-2022-00144 fatcat:dox4duu2xndszauk3xobqcd4l4
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Akashrup Banerjee, D. J. Hinde, M. Dasgupta, J. Sadhukhan, E. C. Simpson, D. Y. Jeung, C. Simenel, B. M. A. Swinton-Bland, E. Williams, L. T. Bezzina, I. P. Carter, K. J. Cook, Helena May Albers, Christoph Emanuel Düllmann, J. Khuyagbaatar, B. Kindler, Bettina Lommel, C. Mokry, E. Prasad, J. Runke, N. Schunck, C. Sengupta, J. F. Smith, P. Thörle-Pospiech, N. Trautmann, K. Vo-Phuoc, J. Walshe, Alexander Yakushev. "Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114)." Physics letters / B 820 (2021) 136601 (2021). doi:10.1016/j.physletb.2021.136601