Phys.Rev. C 87, 044335 (2013)

Z.Kalaninova, A.N.Andreyev, S.Antalic, F.P.Hessberger, D.Ackermann, B.Andel, M.C.Drummond, S.Hofmann, M.Huyse, B.Kindler, J.F.W.Lane, V.Liberati, B.Lommel, R.D.Page, E.Rapisarda, K.Sandhu, S.Saro, A.Thornthwaite, P.Van Duppen

α decay of the very neutron-deficient isotopes ^197-199Fr

NUCLEAR REACTIONS ¹⁴¹Pr(⁶⁰Ni, xn)¹⁹⁷Fr/¹⁹⁸Fr/¹⁹⁹Fr, E=262-300 MeV; measured Eα, Eγ, (ER)α-, αα-correlations, time-of-flight, production σ using SHIP at GSI facility.

RADIOACTIVITY ^197,198,199Fr(α)[from ¹⁴¹Pr(⁶⁰Ni, X), E=262-300 MeV]; measured Eγ, Iγ, Eα, (ER)α-, αα-, αγ-coin, T_1/2 using SHIP at GSI facility. ^193,194,195At, ^189,190,191Bi(α)[from α decay of ^197,198,199Fr parents]; measured Eα, half-lives, αα correlations. ^197,198,199Fr, ^193,194,195At, ^189,190Bi, ¹⁸⁵Tl; deduced levels, J, π, isomers, configurations, reduced α-decay width. ^197,198,199Rn, ¹⁹⁷At, ^{193,194,195,196}Po(α); observed α peaks in spectra. Systematics of α-decay reduced widths for 1/2+ to 1/2+, 7/2- to 7/2-, and 9/2- to 9/2- α transitions in N=105-135, odd-A At, Fe and even-A Rn isotopes.

doi: 10.1103/PhysRevC.87.044335