학술논문
Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114)
Document Type
article
Author
K. 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; H.M. Albers; Ch.E. Düllmann; J. Khuyagbaatar; B. Kindler; B. Lommel; C. Mokry; E. Prasad; J. Runke; N. Schunck; C. Sengupta; J.F. Smith; P. Thörle-Pospiech; N. Trautmann; K. Vo-Phuoc; J. Walshe; A. Yakushev
Source
Physics Letters B, Vol 820, Iss , Pp 136601- (2021)
Subject
Language
English
ISSN
0370-2693
Abstract
Measurements of mass and angular distributions have been made for fission-like outcomes in reactions forming isotopes of flerovium (Z=114), using 48Ca, 50Ti, and 54Cr 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 near-symmetric fission component was consistently required for the 48Ca + 244Pu reaction, giving upper limit to the fusion probabilities PCN of ∼10−2, ∼5 times lower than previous results. PCN for the 50Ti reaction was lower than 48Ca, whilst no evidence of fusion-fission was found for the 54Cr reaction.