[en] The isotopes ^257,255Rf, ^257,256Db, ^253,252Lr have been produced in bombardments of ^207,208Pb and ²⁰⁹Bi target nuclei with ⁵⁰Ti and identified by their α-decay. New or improved decay data could be obtained. Analysis of the fine structure of the α-decay pattern of ²⁵⁷Rf allowed the construction of a first tentative level scheme for the daughter nucleus ²⁵³No and also the identification of a low lying high spin isomeric state, while from α-γ coincidence measurements for ²⁵⁵Rf a first tentative level scheme of the daughter nucleus ²⁵¹No was derived. For ²⁵⁷Db we found that two nuclear levels decay by α-emission and populate also different levels in the daughter nucleus ²⁵³Lr. The levels are produced by the reaction process. In bombardments of ²⁰⁹Bi with ⁵⁰Ti at E*_cn = 26.4 MeV and 30.8 MeV the previously unknown isotopes ²⁵⁶Db and ²²Lr were identified

[en] Since the past 10 years, the recoil separator VASSILISSA has been used for the investigations of evaporation residues produced in heavy-ion-induced complete fusion reactions. In the course of experimental work in the region of the elements with 92≤Z≤94, 14 new isotopes have been identified by the parent-daughter correlations. For further experiments aimed at the synthesis of the superheavy element isotopes (Z≥110) with intensive ⁴⁸Ca extracted beams, improvements in the focal plane detector system have been made. As a result, energy and position resolutions of the detectors have been significantly improved, the detection efficiency for the α-particles, emitted from the implanted into the focal plane detector recoil nuclei, has been increased to 85%. The decay properties of the new isotope of element 112 and the isotope of the new element 114 with mass 287 have been measured in two-nuclei decays

No abstract available

[en] Short communication

[en] The high resolution beam line ACCULINNA put into operation on a primary beam line of the JINR U400M cyclotron is discussed in the framework of the TREBLe project. The capability of the beam line to produce radioactive ion beams is demonstrated by means of nuclear fragmentation of a primary ¹⁴N beam, with an energy of 51 MeV/u, on a 170 mg/cm² carbon target. Characteristics of the obtained ⁶He, ⁸He and ⁸B radioactive beams are presented. A scheme of accumulation and cooling on the orbit of the storage ring K4 is proposed for a low intensity radioactive beam obtained from this beam line. (orig.)