Lightest Isotope of Bh Produced Via the 209Bi(52Cr,n)260BhReaction Page: 1 of 14
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Lightest Isotope of Bh Produced Via the 209Bi(52Cr,n)260Bh Reaction
S. L. Nelson,12 K. E. Gregorich,1 I. Dragojevic,1,2 M. A. Garcia,12 J. M. Gates,12
R. Sudowe, H. Nitschei,2
1 Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley,
2 Department of Chemistry, University of California, Berkeley, California 94720
The lightest isotope of Bh known was produced in the new 209Bi(2Cr,n)260Bh
reaction at the Lawrence Berkeley National Laboratory's 88-Inch Cyclotron. Positive
identification was made by observation of eight correlated alpha particle decay chains in
the focal plane detector of the Berkeley Gas-Filled Separator. 260Bh decays with a
35+g9 ms half-life by alpha particle emission mainly by a group at 10.16 MeV. The
measured cross section of 59+20 pb is approximately a factor of four larger than compared
to recent model predictions. The influence of the N = 152 and Z = 108 shells on alpha
decay properties are discussed.
PACS numbers: 27.90. +b, 23.60. +e, 25.70.Gh
Present address: University of Nevada Las Vegas, Dept. of Health Physics, 4505
Maryland Parkway, Campus Box 453037, Las Vegas, NV 89154-3037
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Nelson, Sarah L.; Gregorich, Kenneth E.; Dragojevic, Irena; Garcia, Mitch A.; Gates, Jacklyn M.; Sudowe, Ralf et al. Lightest Isotope of Bh Produced Via the 209Bi(52Cr,n)260BhReaction, article, May 7, 2007; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc895291/m1/1/: accessed November 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.