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Report No.

Decay studies of neutron-deficient lawrencium isotopes

Antalic, S.*; He${ss}$berger, F. P.*; Hofmann, S.*; Ackermann, D.*; Heinz, S.*; Kindler, B.*; Kojouharov, I.*; Kuusiniemi, P.*; Leino, M.*; Lommel, B.*; Mann, R.*; Nishio, Katsuhisa   ; $v{S}$$'a$ro, $v{S}$.*; Streicher, B.*; Sulignano, B.*; Venhart, M.*

The radioactive decay of the isotopes $$^{254-256}$$Lr and their daughter products was investigated by means of $$alpha$$, prompt $$alpha-gamma$$ and delayed conversion electron$$-gamma$$ coincidence spectroscopy. The experiment was carried out at GSI by using the velocity filter SHIP to separate evaporation residues, produced in the reaction $$^{48}$$Ca+$$^{209}$$Bi, from the primary beams. In $$^{255}$$Lr, a second short-lived isomer with a half-life of 1.91 ms was found. For $$^{254,256}$$Lr, new data for $$gamma$$ transitions of levels in $$^{250,252}$$Md populated by $$alpha$$ decay were observed. The constructed level schemes are useful for the nuclear structure theory.



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Category:Physics, Nuclear



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