β-decay study of neutron-rich bromine and krypton isotopes.

Authors :: Miernik, K.
Rykaczewski, K. P.
Grzywacz, R.
Gross, C. J.
Stracener, D. W.
Batchelder, J. C.
Brewer, N. T.
Cartegni, L.
Fijalkowska, A.
Hamilton, J. H.
J. K. Hwang
Ilyushkin, S. V.
Jost, C.
Karny, M.
Korgul, A.
Królas, W.
S. H. Liu
Madurga, M.
Mazzocchi, C.
Mendez II, A. J.
Source :: Physical Review C: Nuclear Physics. Jul2013, Vol. 88 Issue 1, p1-9. 9p.
Publication Year :: 2013
Abstract: Short-lived neutron-rich nuclei including 93Br, 93Kr, and 94Kr were produced in proton-induced fission of 238U at the Holifield Radioactive Ion Beam Facility in Oak Ridge. Their ß decay was studied by means of a high-resolution online mass separator and β-γ spectroscopy methods. The half-life of T1/2 = 152(8) ms and β-delayed branching ratio of Pn = 53' % measured for 93Br differs from the previously reported values of T1/2 = 102(10) ms and Pn = 68(7)%. At the same time the half-life of 94Kr Tlß = 227( 14) ms and both the half-life of T\ß = 1.298(54) s and β-delayed branching ratio of Pn = 1.9-0.2+0.6% of 93Kr are in very good agreement with literature values. The decay properties of 93Br include previously unreported γ transitions following β-delayed neutron emission. [ABSTRACT FROM AUTHOR]