Eur. Phys. J. A 12, 269-277 (2001)
First measurement of
-decay properties of the
proton drip-line nucleus
C. Mazzocchi1, 2, Z. Janas1, 3, J. Döring1, M. Axiotis4, L. Batist5, R. Borcea1, D. Cano-Ott6, E. Caurier7, G. de Angelis4, E. Farnea4, 8, A. Faßbender1, A. Gadea4, 9, H. Grawe1, A. Jungclaus10, M. Kapica1, R. Kirchner1, J. Kurcewicz1, S.M. Lenzi8, T. Martínez4, 9, I. Mukha1, E. Nácher9, D.R. Napoli4, E. Roeckl1, B. Rubio9, R. Schwengner11, J.L. Tain9 and C.A. Ur8
1 Gesellschaft für Schwerionenforschung, Darmstadt, D-64291 Darmstadt, Germany
2 Universitá degli Studi di Milano, I-20133 Milano, Italy
3 Institute of Experimental Physics, University of Warsaw, PL-00681 Warsaw, Poland
4 Laboratori Nazionali di Legnaro - INFN, I-35020 Legnaro, Italy
5 St. Petersburg Nuclear Physics Institute, RU-188-350 Gatchina, Russia
6 Department of Nuclear Fission, CIEMAT, E-28040 Madrid, Spain
7 Institut de Recherches Subatomiques (IN2P3-CNRS-Université Louis Pasteur), F-67037 Strasbourg Cedex 2, France
8 Dipartimento di Fisica dell'Universitá di Padova and INFN, I-35131 Padova, Italy
9 Instituto de Fisica Corpuscular, CSIC-Universidad de Valencia, E-46100 Burjassot-Valencia, Spain
10 Departamento de Fisica Teórica, Universidad Autónoma de Madrid, E-28049 and Instituto Estructura de la Materia, CSIC, E-28006 Madrid, Spain
11 Forschungszentrum Rossendorf, D-01314 Dresden, Germany
c.mazzocchi@gsi.de
(Received: 4 September 2001 / Revised version: 23 October 2001 Communicated by J. Äystö )
Abstract
By using the fusion-evaporation reaction
28Si(
36Ar,p3n)
and spectroscopy of
-delayed
-rays and charged
particles on mass-separated sources,
-decay properties of
the neutron-deficient isotope
60Ga were studied for the first
time. The half-life of
60Ga was determined to be 70(15) ms,
and, based on
coincidences, the isobaric-analogue state in
60Zn was identified at 4851.9(7) keV. A semiempirical proton separation
energy value of 40(70) keV was deduced for
60Ga. The experimental
results on half-life, mass excess, proton separation energy, and structure of the
60Zn daughter states
are discussed in comparison with various model predictions, including large-scale
shell model calculations.
21.10.-k - Properties of nuclei; nuclear energy levels.
23.40.-s - Beta decay; double beta decay; electron and muon capture.
21.60.Cs - Shell model.
© Società Italiana di Fisica, Springer-Verlag 2001