학술논문
ISOL beams of hafnium isotopes and isomers
Document Type
Report
Author abstract
Author abstract
Author
Source
The European Physical Journal Special Topics. Nov, 2007, Vol. 150 Issue 1, p293, 4 p.
Subject
Language
English
ISSN
1951-6355
Abstract
The production of ISOL beams of hafnium is described. Radioactive Hf isotopes were produced at ISOLDE by 1.4 GeV proton-induced spallation in Ta and W foils. Chemical evaporation in form of HfF.sub.4 and mass separation in the molecular sideband HfF.sub.3.sup.+ after electron impact ionization provided intense and pure beams. Beams of 158-185.sup.Hf and short-lived isomers down to 1.1s 177m.sup.Hf were observed, but the method could be extended to reach even more exotic isotopes: down to about 154.sup.Hf (N=82) on the neutron-deficient side and up to neutron-rich 188.sup.Hf.