Beta-strength and anti-neutrino spectra from total absorption spectroscopy of a decay chain ¹⁴²Cs→¹⁴²Ba→¹⁴²La

¹ Heavy Ion Laboratory, University of Warsaw, 02-093 Warsaw, Poland
² Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
³ JINPA, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
⁴ Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USA
⁵ Faculty of Physics, University of Warsaw, 02-093 Warsaw, Poland
⁶ National Nuclear Data Center, Brookhaven National Laboratory, Upton, NY 11973, USA
⁷ Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, USA
⁸ Department of Physics and Astronomy, Mississippi State University, Mississippi State, MS 39762, USA
⁹ Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA

^a e-mail: mala@slcj.uw.edu.pl

Published online: 13 September 2017

Abstract

Beta decays of mass A = 142 isobaric chain starting from ¹⁴²Cs have been investigated by means of Modular Total Absorption Spectrometer (MTAS) and on-line mass separation at Oak Ridge National Laboratory. The beta strength distribution derived for ¹⁴²Cs decay from MTAS spectra is showing significant differences in β-feeding pattern when compared to the values listed at nuclear databases. MTAS results are shifting the associated anti-neutrino energy spectrum towards lower energies. A decay pattern deduced for ¹⁴²Ba is similar to earlier reported results.