Decay Properties of 266 Bh and 262 Db Produced in the 248 Cm + 23 Na Reaction

  title={Decay Properties of 266 Bh and 262 Db Produced in the 248 Cm + 23 Na Reaction},
  author={K. Morita and K. Morimoto and D. Kaji and H. Haba and K. Ozeki and Y. Kudou and N. Sato and T. Sumita and A. Yoneda and T. Ichikawa and Y. Fujimori and S. Goto and E. Ideguchi and Y. Kasamatsu and K. Katori and Y. Komori and H. Koura and H. Kudo and K. Ooe and A. Ozawa and F. Tokanai and K. Tsukada and T. Yamaguchi and A. Yoshida},
  journal={Journal of the Physical Society of Japan},
Decay properties of an isotope 266 Bh and its daughter nucleus 262 Db produced by the 248 Cm( 23 Na,5 n ) reaction were studied by using a gas-filled recoil separator coupled with a position-sensitive semiconductor detector. 266 Bh was clearly identified from the correlation of the known nuclide, 262 Db. The obtained decay properties of 266 Bh and 262 Db are consistent with those observed in the 278 113 chain, which provided further confirmation of the discovery of 278 113. 

Figures and Tables from this paper

Superheavy research at RIKEN
Abstract At RIKEN, Japan, we performed experiments to study the productions and decays of the heaviest elements produced by 208 Pb- and 209 Bi- based ‘cold fusion’ reactions. A gas-filled recoilExpand
New Result in the Production and Decay of an Isotope, 278113, of the 113th Element
An isotope of the 113th element, i.e., 278 113, was produced in a nuclear reaction with a 70 Zn beam on a 209 Bi target. We observed six consecutive α-decays following the implantation of a heavyExpand
Superheavy nuclei from 48 Ca-induced reactions
Abstract The discovery and investigation of the new region of superheavy nuclei at the DGFRS separator based on fusion reactions of 48 Ca with 238 U– 249 Cf target nuclei are reviewed. The productionExpand
SHE research at RIKEN/GARIS
Abstract In this contribution, heavy-element research at RIKEN, Japan is reviewed. Nuclei of the heaviest elements were produced by the reactions 208Pb(64Ni, n)271Ds, 209Bi(64Ni, n)272Rg, 208Pb(70Zn,Expand
Nuclear Data Sheets for A=258
Abstract Spectroscopic data for A=258 nuclides have been updated and re-evaluated, superseding the data presented in the previous evaluation 2001Ak11 published by Y.A. Akovali. The excited state dataExpand
Calculations of Branching Ratios for Radiative-Capture, One-Proton, and Two-Neutron Channels in the Fusion Reaction 209Bi + 70Zn
We discuss the possibility of the non-one-neutron emission channels in the cold fusion reaction 70 Zn + 209 Bi to produce the element Z =113. For this purpose, we calculate the evaporation-residueExpand
In situ synthesis of volatile carbonyl complexes with short-lived nuclides
Rapid in situ formation of metal carbonyl complexes with short-lived nuclides has been demonstrated to be feasible with recoiling ions formed in nuclear fusion and fission reactions. These carbonylExpand
Direct mass measurements of the heaviest elements with Penning traps
Abstract Penning-trap mass spectrometry (PTMS) is a mature technique to provide atomic masses with highest precision. Applied to radionuclides it enables us to investigate their nuclear structure viaExpand
Gas-filled recoil ion separator GARIS-II
We designed a new gas-filled recoil ion separator GARIS-II which consists of five magnets arranged in a Qv–D–Qh–Qv–D configuration. The construction of GARIS-II started in September 2008, and theExpand
Average charge of superheavy recoil ion in helium gas
Abstract The average equilibrium charges qave of heavy recoil ions moving in helium gas were measured by a gas-filled recoil ion separator (GARIS). A new empirical formula to calculate qave forExpand


Evidence for new isotopes of element 107: 266Bh and 267Bh
New neutron rich isotopes 267107Bh and 266107Bh were produced in bombardments of a 249Bk target with 117-MeV and 123-MeV 22Ne ions at the Lawrence Berkeley National Laboratory 88-Inch Cyclotron.Expand
Experiment on the Synthesis of Element 113 in the Reaction 209Bi(70Zn,n)278113
The convincing candidate event of the isotope of the 113th element, 278 113, and its daughter nuclei, 274 111 and 270 Mt, were observed, for the first time, in the 209 Bi + 70 Zn reaction at a beamExpand
Experimental identification of spin-parities and single-particle configurations in 257No and its alpha-decay daughter 253Fm.
It was found that the ground-state configuration of (257)No is different from that of lighter N = 155 isotones, and spin-parities of excited states in (253)Fm fed by the alpha decay of (256)No have been identified on the basis of the measured internal conversion coefficients. Expand
Observation of Second Decay Chain from 278113
RIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198 Department of Physics, Saitama University, Saitama 338-8570 Center for Instrumental Analysis, Niigata University,Expand
Fission branch in 259Lr and confirmation of 258Lr and 259Lr mass assignments.
Author(s): Gregorich, K.E.; Hall, H.L.; Henderson, R.R.; Kreek, S.A.; Kadkhodayan, B.A. Expand
Nuclear ground state masses and deformations
Abstract We tabulate the atomic mass excesses and nuclear ground-state deformations of 8979 nuclei ranging from 16O to A = 339. The calculations are based on the finite-range droplet macroscopicExpand
New nuclide 263Ha.
  • Kratz, Gober, +16 authors Weber
  • Physics, Medicine
  • Physical review. C, Nuclear physics
  • 1992
A new nuclide was produced in the bombardment of a target with 93-MeV ions and found to decay by spontaneous fission and by \ensuremath{\alpha} emission, compatible with an average total kinetic energy of about 200 MeV. Expand
J. Phys. Soc. Jpn
  • J. Phys. Soc. Jpn
  • 2007
Phys. Rev. Lett
  • Phys. Rev. Lett
  • 2005
J. Phys. Soc. Jpn
  • J. Phys. Soc. Jpn
  • 2004