Eur. Phys. J. A (2005) 25: 211-222
https://doi.org/10.1140/epja/i2005-10108-1

Original Article

Beta decay of ¹⁰³Sn

¹ GSI, Darmstadt, Germany
² National Taras Shevchenko University of Kyiv, Ukraine
³ St. Petersburg Nuclear Physics Institute, Russia
⁴ Università “Federico II” and INFN, Napoli, Italy
⁵ University of Sofia, Bulgaria
⁶ Technische Universität München, Germany
⁷ University of Warsaw, Poland
⁸ Departamento de Fisica Teórica, Universidad Autonoma de Madrid, Spain
⁹ Kurchatov Institute, Moscow, Russia
¹⁰ Nuclear Science Center, New Delhi, India
¹¹ Forschungszentrum Rossendorf, Germany

^* e-mail: O.Kavatsyuk@gsi.de

Received: 3 April 2005
Accepted: 21 June 2005
Published online: 26 August 2005

Abstract

The β decay of ¹⁰³Sn, a three-neutron-particle nucleus with respect to the ¹⁰⁰Sn core, was investigated at the GSI on-line mass separator using an array of 17 germanium crystals and a total absorption spectrometer. A total of 31 β-delayed γ-rays (29 new) of the ¹⁰³Sn →¹⁰³ In decay were observed and, on the basis of β-γ-γ coincidences, the ¹⁰³Sn decay scheme was established for the first time. By means of total absorption spectroscopy, β intensities, the Gamow-Teller strength distribution and the summed Gamow-Teller strength value of 3.5±0.5 were determined for this decay. Its half-life and Q _EC value were found to be 7.0±0.2 s and 7.64±0.7 MeV, respectively. The β-delayed proton branching ratio was measured to be 1.2±0.1%. The results are discussed in comparison with shell-model predictions based on realistic and empirical interactions.