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Population of nuclides with Z$$ge$$98 in multi-nucleon transfer reactions of $$^{48}$$Ca+$$^{248}$$Cm

$$^{48}$$Ca+$$^{248}$$Cm多核子移行反応によるZ$$ge$$98原子核の生成

Devaraja, H. M.*; Heinz, S.*; Beliuskina, O.*; Hofmann, S.*; Hornung, C.*; M$"u$nzenberg, G.*; Ackermann, D.*; Gupta, M.*; Gambhir, Y. K.*; Henderson, R. A.*; He${ss}$berger, F. P.*; Yeremin, A. V.*; Kindler, B.*; Lommel, B.*; Maurer, J.*; Moody, K. J.*; 西尾 勝久; Popeko, A. G.*; Stoyer, M. A.*; Shaughnessy, D. A.*

Devaraja, H. M.*; Heinz, S.*; Beliuskina, O.*; Hofmann, S.*; Hornung, C.*; M$"u$nzenberg, G.*; Ackermann, D.*; Gupta, M.*; Gambhir, Y. K.*; Henderson, R. A.*; He${ss}$berger, F. P.*; Yeremin, A. V.*; Kindler, B.*; Lommel, B.*; Maurer, J.*; Moody, K. J.*; Nishio, Katsuhisa; Popeko, A. G.*; Stoyer, M. A.*; Shaughnessy, D. A.*

The results for nuclei above curium, produced in multi-nucleon transfer reactions of $$^{48}$$Ca+$$^{248}$$Cm at the velocity filter SHIP of GSI Darmstadt, are presented. Spontaneous fission and $$alpha$$ activities have been used to study the population of nuclei with lifetimes ranging from few milliseconds to several days. We observed several, relatively neutron-rich isotopes with atomic numbers Z $$ge$$ 98; among them a weak 224 millisecond activity which we tentatively attributed to $$^{260}$$No. The measured cross-sections of the observed nuclei give hope that multi-nucleon transfer reactions are a way to reach new neutron-rich heavy and superheavy nuclei, which are not accessible in other reactions. We compare our results with data from earlier experiments and discuss limitations and future perspectives of the method.

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パーセンタイル:14.11

分野:Physics, Nuclear

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