Fusion reaction ⁴⁸Ca + ²⁴⁹Bk leading to formation of the element Ts (Z=117)

Summary, in English

The heaviest currently known nuclei, which have up to 118 protons, have been produced in ⁴⁸Ca induced reactions with actinide targets. Among them, the element tennessine (Ts), which has 117 protons, has been synthesized by fusing ⁴⁸Ca with the radioactive target ²⁴⁹Bk, which has a half-life of 327 d. The experiment was performed at the gas-filled recoil separator TASCA. Two long and two short α decay chains were observed. The long chains were attributed to the decay of ²⁹⁴Ts. The possible origin of the short-decay chains is discussed in comparison with the known experimental data. They are found to fit with the decay chain patterns attributed to ²⁹³Ts. The present experimental results confirm the previous findings at the Dubna Gas-Filled Recoil Separator on the decay chains originating from the nuclei assigned to Ts.

• Author: J. Khuyagbaatar; A. Yakushev; Ch E. Düllmann; D. Ackermann; L. L. Andersson; M. Asai; M. Block; R. A. Boll; H. Brand; D. M. Cox; M. Dasgupta; X. Derkx; A. Di Nitto; K. Eberhardt; J. Even; M. Evers; C. Fahlander; U. Forsberg; J. M. Gates; N. Gharibyan; P. Golubev; K. E. Gregorich; J. H. Hamilton; W. Hartmann; R. D. Herzberg; F. P. Heßberger; D. J. Hinde; J. Hoffmann; R. Hollinger; A. Hübner; E. Jäger; B. Kindler; J. V. Kratz; J. Krier; N. Kurz; M. Laatiaoui; S. Lahiri; R. Lang; B. Lommel; M. Maiti; K. Miernik; S. Minami; A. Mistry; C. Mokry; H. Nitsche; J. P. Omtvedt; G. K. Pang; P. Papadakis; D. Renisch; J. Roberto; D. Rudolph; J. Runke; K. P. Rykaczewski; L. G. Sarmiento; M. Schädel; B. Schausten; A. Semchenkov; D. A. Shaughnessy; P. Steinegger; J. Steiner; E. E. Tereshatov; P. Thörle-Pospiech; K. Tinschert; T. Torres De Heidenreich; N. Trautmann; A. Türler; J. Uusitalo; D. E. Ward; M. Wegrzecki; N. Wiehl; S. M. Van Cleve; V. Yakusheva
• Department/s: Nuclear physics; Mathematical Physics
• Publishing year: 2019-05-07
• Language: English
• Publication/Series: Physical Review C
• Volume: 99
• Issue: 5
• Full text: - 5 MB; Download statistics
• Links: http://dx.doi.org/10.1103/PhysRevC.99.054306
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Keywords: superheavy elements; element 117 (Ts); alpha decay; gas-filled separator
• Status: Published
• Project: Characterization of New Superheavy Elements; Nuclear Structure at the Limits: Isotope-selective Spectroscopy
• ISBN/ISSN/Other: ISSN: 2469-9985