Search for the heaviest atomic nuclei among the products from reactions of mixed-Cf with a Ca48 beam

N. T. Brewer,V. K. Utyonkov,K. Rykaczewski,Yu. Ts. Oganessian,F. Sh. Abdullin, R. A. Boll,D. J. Dean,S. N. Dmitriev, J. G. Ezold,L. K. Felker,R. K. Grzywacz,M. G. Itkis, N. D. Kovrizhnykh, D. C. McInturff,K. Miernik, G. D. Owen,A. N. Polyakov,A. G. Popeko, J. B. Roberto,A. V. Sabel'nikov, R. N. Sagaidak, I. V. Shirokovsky, M. V. Shumeiko, N. J. Sims, E. H. Smith, V. G. Subbotin,A. M. Sukhov,A. I. Svirikhin,Yu. S. Tsyganov, S. M. Van Cleve,A. A. Voinov, G. K. Vostokin,C. S. White,J. H. Hamilton,M. A. Stoyer

PHYSICAL REVIEW C（2018）

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摘要

The search for new decay chains of oganesson isotopes is presented. The experiment utilized the Dubna Gas Filled Recoil Separator and a highly segmented recoil-decay detection system. The signals from all detectors were analyzed in parallel by digital and analog data acquisition systems. For the first time, a target of mixed californium (51% Cf-249, 13% Cf-250, and 36% Cf-251) recovered from decayed Cf-252 sources was produced and irradiated with an intense Ca-48 beam. The observation of a new decay chain of (294)Og is reported. The prospects for reaching new isotopes (295,296)Og are discussed.

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heaviest atomic nuclei,reactions

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