Spectroscopy along flerovium decay chains. II. Fine structure in odd- $\mathrm{A}$ $^{289}\mathrm{Fl}

Fifteen correlated α-decay chains starting from the odd-A superheavy nucleus 289Fl were observed following the fusion-evaporation reaction 48Ca + 244Pu. The results call for at least two parallel α-decay sequences starting from at least two different states of 289Fl. This implies that close-lying le...

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Veröffentlicht in:Physical review. C 2023-02, Vol.107 (2)
Hauptverfasser: Cox, D. M., Såmark-Roth, A., Rudolph, D., Sarmiento, L. G., Clark, R. M., Egido, J. L., Golubev, P., Heery, J., Yakushev, A., Åberg, S., Albers, H. M., Albertsson, M., Block, M., Brand, H., Calverley, T., Cantemir, R., Carlsson, B. G., Düllmann, Ch. E., Eberth, J., Fahlander, C., Forsberg, U., Gates, J. M., Giacoppo, F., Götz, M., Götz, S., Herzberg, R. -D., Hrabar, Y., Jäger, E., Judson, D., Khuyagbaatar, J., Kindler, B., Kojouharov, I., Kratz, J. V., Krier, J., Kurz, N., Lens, L., Ljungberg, J., Lommel, B., Louko, J., Meyer, C. -C., Mistry, A., Mokry, C., Papadakis, P., Parr, E., Pore, J. L., Ragnarsson, I., Runke, J., Schädel, M., Schaffner, H., Schausten, B., Shaughnessy, D. A., Thörle-Pospiech, P., Trautmann, N., Uusitalo, J.
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container_title Physical review. C
container_volume 107
creator Cox, D. M.
Såmark-Roth, A.
Rudolph, D.
Sarmiento, L. G.
Clark, R. M.
Egido, J. L.
Golubev, P.
Heery, J.
Yakushev, A.
Åberg, S.
Albers, H. M.
Albertsson, M.
Block, M.
Brand, H.
Calverley, T.
Cantemir, R.
Carlsson, B. G.
Düllmann, Ch. E.
Eberth, J.
Fahlander, C.
Forsberg, U.
Gates, J. M.
Giacoppo, F.
Götz, M.
Götz, S.
Herzberg, R. -D.
Hrabar, Y.
Jäger, E.
Judson, D.
Khuyagbaatar, J.
Kindler, B.
Kojouharov, I.
Kratz, J. V.
Krier, J.
Kurz, N.
Lens, L.
Ljungberg, J.
Lommel, B.
Louko, J.
Meyer, C. -C.
Mistry, A.
Mokry, C.
Papadakis, P.
Parr, E.
Pore, J. L.
Ragnarsson, I.
Runke, J.
Schädel, M.
Schaffner, H.
Schausten, B.
Shaughnessy, D. A.
Thörle-Pospiech, P.
Trautmann, N.
Uusitalo, J.
description Fifteen correlated α-decay chains starting from the odd-A superheavy nucleus 289Fl were observed following the fusion-evaporation reaction 48Ca + 244Pu. The results call for at least two parallel α-decay sequences starting from at least two different states of 289Fl. This implies that close-lying levels in nuclei along these chains have quite different spin-parity assignments. Further, observed α-electron and α-photon coincidences, as well as the α- decay fine structure along the decay chains, suggest a change in the ground-state spin assignment between 285Cn and 281Ds. Our experimental results, on the excited level structure of the heaviest odd-N nuclei to date, provide a direct testing ground for theory. This is illustrated by comparison with new nuclear structure calculations based on the symmetry-conserving configuration mixing theory.
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subjects alpha decay
low and intermediate energy heavy-ion reactions
nuclear density functional theory
NUCLEAR PHYSICS AND RADIATION PHYSICS
nuclear structure and decays
title Spectroscopy along flerovium decay chains. II. Fine structure in odd- $\mathrm{A}$ $^{289}\mathrm{Fl}
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