Eur. Phys. J. A (2004) 20: 385-387
https://doi.org/10.1140/epja/i2004-10020-2

Letter

New isotope ²⁶⁵Bh

¹ Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, PRC
² Department of Physics, Nanjing University, 210008, Nanjing, PRC

^* e-mail: zggan@impcas.ac.cn

Abstract

A new isotope ²⁶⁵ Bh was produced and identified at the Sector Focus Cyclotron of the Heavy Ion Research Facility in Lanzhou. This experiment was performed via the reaction of an ²⁴³ Am target with 168 MeV ²⁶ Mg ions. Identification was made by observation of correlated -particle decays between the new isotope ²⁶⁵ Bh and its ²⁶¹ Db and ²⁵⁷ Lr daughter nuclei using a set of rotating-wheels system. A total of 8 correlated decay events of ²⁶⁵ Bh and 4 decay events of ²⁶⁴ Bh were observed. ²⁶⁵ Bh decays with a 0.94 _-0.31 ^{+ 0.70} s half-life by emission of -particles with an average energy of MeV. The half-life and decay energy of ²⁶⁵ Bh from this experiment are in agreement with theoretical predictions.