Identification of a High-Spin Isomer in Mo-99

Authors :: Liu, Z.
Podolyák, Zs.
Carpenter, M.P.
Walker, P.M.
Jones, G.A.
Lane, G.J.
Chowdhury, P.
Carroll, J.J.
Kondev, F.G.
Williams, S.J.
Zhu, S.
Regan, P.H.
Janssens, R.V.F.
Chakrawarthy, R.S.
Thompson, N.J.
Khoo, T.L.
Stevenson, P.D.
Seweryniak, D.
Garnsworthy, A.B.
Publication Year :: 2007
Abstract: A previously unreported isomer has been identified in Mo-99 at an excitation energy of E-x = 3010 keV, decaying with a half-life of T-1/2 = 8(2) ns. The nucleus of interest was produced following fusion-fission reactions between a thick Al-27 target frame and a Hf-178 beam at a laboratory energy of 1150 MeV. This isomeric state is interpreted as an energetically favored, maximally aligned configuration of nu h (11/2) circle times pi(g (9/2))(2).

Tools