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$$alpha$$ decay of $$^{243}$$Fm$$_{143}$$ and $$^{245}$$Fm$$_{145}$$, and of their daughter nuclei

Khuyagbaatar, J.*; He${ss}$berger, F. P.*; Hofmann, S.*; Ackermann, D.*; Burkhard, H. G.*; Heinz, S.*; Kindler, B.*; Kojouharov, I.*; Lommel, B.*; Mann, R.*; Maurer, J.*; Nishio, Katsuhisa   

Nuclear structure of $$^{243}$$Fm, $$^{245}$$Fm, and their daughter nuclei were investigated via detection of their radioactive decays, $$alpha$$, $$gamma$$, and spontaneous fission. Measured $$alpha$$-decay energies, half-lives, and branching ratios improve the literature data significantly. A signature for detection of the hitherto unknown $$^{235}$$Cm was found in the $$alpha$$-decay chains from $$^{243}$$Fm. Two groups of $$alpha$$ events with average energies of 6.69(2) MeV and 7.01(2) MeV and with a half-life of $$T_{1/2}$$ = 300$$^{+250}_{-100}$$, s are suggested to originate from $$^{235}$$Cm. Tentative decay schemes for $$^{243}$$Fm, $$^{239}$$Cf, $$^{235}$$Cm, and $$^{245}$$Fm, $$^{241}$$Cf isotopes are suggested based on the present experimental data. Systematical trends of single-particle states in $$N$$=141 isotones of $$Z$$ = 92-98 nuclei are discussed.

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Category:Physics, Nuclear

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