Eur. Phys. J. A 13, 281-284 (2002)
Note
Selective laser ionization of
indium isotopes:
The new r-process nuclide
I. Dillmann1, M. Hannawald1, U. Köster2, V.N. Fedoseyev2, A. Wöhr3, B. Pfeiffer1, D. Fedorov4, J. Shergur3, L. Weissman2, W.B. Walters3 and K.-L. Kratz1
1 Institut für Kernchemie, Universität Mainz, D-55128 Mainz, Germany
2 CERN, CH-1211 Geneva 23, Switzerland
3 Department of Chemistry, University of Maryland, College Park, MD 20742, USA
4 Petersburg Nuclear Physics Institute, RUS-188350, Gatchina, Russia
kl.kratz@uni-mainz.de
(Received: 17 January 2002 Communicated by J. Äystö)
Abstract
Production yields and
-decay half-lives (
T1/2) of very
neutron-rich indium isotopes were determined at CERN/ISOLDE using isobaric
selectivity of a resonance-ionization laser ion-source. Beta-delayed
neutron (
dn) multiscaling measurements have yielded improved
T1/2
for 206(6) ms
132In, 165(3) ms
133In and 141(5) ms
134In.
With 92(10) ms
135In, a new r-process nuclide has been identified
which acts as an important "waiting point" in the In isotopic chain for
neutron densities in the range
-10
26 n/cm
3,
where the r-matter flow has already passed the
abundance peak
region.
21.10.Tg - Lifetimes.
27.60.+j -

25.85.Ec - Neutron-induced fission.
32.80.Fb - Photoionization of atoms and ions.
© Società Italiana di Fisica, Springer-Verlag 2002