Decay study of neutron-rich zirconium isotopes employing a Penning trap as a spectroscopy tool期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Decay study of neutron-rich zirconium isotopes employing a Penning trap as a spectroscopy tool

Authors:	S. Rinta-Antila T. Eronen V. -V. Elomaa U. Hager J. Hakala A. Jokinen P. Karvonen H. Penttilä J. Rissanen T. Sonoda A. Saastamoinen J. Äystö

Affiliation:	1. Department of Physics, University of Jyv?skyl?, P.O. Box 35 (YFL), FIN-40014, Jyv?skyl?, Finland

Abstract:	A new technique to produce isobarically pure ion beams for decay spectroscopy by using a gas-filled Penning trap was commissioned at the ion guide isotope separator on-line facility, IGISOL. β-decays of neutron-rich ¹⁰⁰Zr, ¹⁰²Zr and ¹⁰⁴Zr isotopes were studied with this technique. In addition, the $ensuremath Q_{beta^{-}}$ values of ^100,102,104Zr β-decays were determined from the direct mass measurements of zirconium and niobium isotopes performed with a high-precision Penning trap. The mass of ¹⁰⁴Nb was directly measured for the first time and the obtained mass excess value for the longer-living (1⁺) state is -71823±10 keV. For the ground states of ¹⁰⁰Nb and ¹⁰²Nb the obtained mass excess values were -79802±20 keV and -76309±10 keV, respectively. The observed distribution of the β strength supports a prolate deformation assignment for ^100,102,104Zr isotopes.

Keywords:	07.75.+h Mass spectrometers 21.10.Dr Nuclear structure: Binding energies and masses 27.60.+j 90 ⩽ A ⩽ 149 23.40.-s β decay double β decay electron and muon capture
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