4π-ionization chamber — a detector for a kinematic separator of heavy ion reaction products

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 330; no. 1; pp. 125 - 131
• Main Authors: Andreyev, A.N., Bogdanov, D.D., Chepigin, V.I., Gorshkov, V.A., Mikhailov, K.V., Kabachenko, A.P., Popeko, G.S., Saro, S., Ter-Akopian, G.M., Yeremin, A.V., Zeinalov, Sh.S.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 10.06.1993
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/0168-9002(93)91313-C

Construction and properties of a double ionization chamber (DIC) are described. Heavy ion fusion-evaporation reaction products obtained at the focal plane of the kinematic separator VASSILISSA enter the DIC volume through a thin plastic window. After their thermalization in the gas, they drift in the electric field to the DIC cathode. Their α-decay and/or spontaneous fission are detected in 4π-geometry in two ionization chambers, divided by the common cathode. Using DIC the α-decay of Bi and Pb isotopes produced in the fusion reactions 40Ar + 159Tb and 40Ca + 153Eu were detected. A new isomer, 189mBi was observed.