Modernization of the detector system at the recoil separator Vassilissa

Citation
On. Malyshev et al., Modernization of the detector system at the recoil separator Vassilissa, NUCL INST A, 440(1), 2000, pp. 86-94
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
440
Issue
1
Year of publication
2000
Pages
86 - 94
Database
ISI
SICI code
0168-9002(20000121)440:1<86:MOTDSA>2.0.ZU;2-G
Abstract
Since the past 10 years, the recoil separator VASSILISSA has been used for the investigations of evaporation residues produced in heavy-ion-induced co mplete fusion reactions. Tn the course of experimental work in the region o f the elements with 92 less than or equal to Z less than or equal to 94, 14 new isotopes have been identified by the parent-daughter correlations. For further experiments aimed at the synthesis of the superheavy element isoto pes (Z greater than or equal to 110) with intensive Ca-48 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 alpha-particles, emitted from th e implanted into the focal plane detector recoil nuclei, has been increased to 85%. The decay properties of the now isotope of element 112 and the iso tope of the new element 114 with mass 287 have been measured in two-nuclei decays. (C) 2000 Elsevier Science B.V. All rights reserved.