Lifetime measurement of He$^-$ and Be$^-$ using an electrostatic ion trap
D. Zajfman$^1$, O. Heber$^1$, K. G. Bhushan$^1$, L. Knoll$^2$, A.
Wolf$^2$, I. Ben Itzhak$^3$, and  M. L. Rappaport$^1$
$^1$Department of Particle Physics, Weizmann Institute of Science, Rehovot, 76100,
$^2$Max-Planck-Institut f\"ur
Kernphysik, D--69029 Heidelberg, Germany
$^3$J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506.
The lifetime of He$^-$ and Be$^-$ are measured using an electrostatic
ion trap which avoids the complication due to the presence of magnetic
fields in heavy-ion storage rings.