skip to main content

DOE PAGESDOE PAGES

Title: Decay spectroscopy of element 115 daughters: Rg280Mt276 and Mt276Bh272

In this study, forty-six decay chains, assigned to the decay of 288115, were produced using the 243Am (48Ca, 3n) 288115 reaction at the Lawrence Berkeley National Laboratory 88-in. cyclotron. The resulting series of α decays were studied using α-photon and α-x-ray spectroscopies. Multiple α-photon coincidences were observed in the element 115 decay chain members, particularly in the third- and fourth-generation decays (presumed to be 280Rg and 276Mt, respectively). Upon combining these data with those from 22 288115 decay chains observed in a similar experiment, updated level schemes in 276Mt and 272Bh (populated by the α decay of 280Rg and 276Mt, respectively) are proposed. Additionally, photons were observed in the energy range expected for K x rays coincident with the α decay of both 280Rg and 276Mt. However, Compton scattering of higher-energy γ rays and discrete transitions are present in the K x-ray region preventing a definitive Z identification to be made based on observation of characteristic K x-ray energies.
Authors:
 [1] ;  [1] ;  [2] ;  [2] ;  [1] ;  [3] ;  [4] ;  [1] ;  [1] ;  [1] ;  [1] ;  [5] ;  [6] ;  [2] ;  [7] ;  [1] ;  [1] ;  [7] ;  [8] ;  [9] more »;  [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [1] ;  [7] ;  [7] ;  [2] ;  [3] ;  [1] ;  [4] ;  [2] « less
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. GSI Helmholtzzentrum fur Schwerionenforschung GmbH (Germany)
  5. Johannes Gutenberg-Universitat Mainz (Germany)
  6. GSI Helmholtzzentrum fur Schwerionenforschung GmbH (Germany); Johannes Gutenberg-Universitat Mainz (Germany); Helmholtz Institute Mainz (Germany)
  7. Lund Univ. (Sweden)
  8. GSI Helmholtzzentrum fur Schwerionenforschung GmbH (Germany); Helmholtz Institute Mainz (Germany)
  9. Oregon State Univ., Corvallis, OR (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-737626
Journal ID: ISSN 0556-2813; PRVCAN
Grant/Contract Number:
AC52-07NA27344; AC02-05CH11231; FG06-97ER41026
Type:
Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 2; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1393336
Alternate Identifier(s):
OSTI ID: 1208207