Author/Authors :
Malyshev، نويسنده , , O.N. and Chelnokov، نويسنده , , M.L. and Chepigin، نويسنده , , V.I. and Gorshkov، نويسنده , , V.A. and Hofmann، نويسنده , , S. and Kabachenko، نويسنده , , A.P. and Keters، نويسنده , , M. and Lavrentev، نويسنده , , A.Yu. and Popeko، نويسنده , , A.G. and Rohach، نويسنده , , J. and Sagaidak، نويسنده , , R.N. and Sharo، نويسنده , , S. and Yeremin، نويسنده , , A.V.، نويسنده ,
Abstract :
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.
Keywords :
Recoil separator , ?-radioactivity , Spontaneous fission , Position-sensitive semiconductor detector
