Decay study of neutron-rich zirconium isotopes employing a Penning trap as a spectroscopy tool
Decay study of neutron-rich zirconium isotopes employing a Penning trap as a spectroscopy tool
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DOI：
10.1140/epja/i2006-10158-9
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发表时间：
2007-01
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影响因子：
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通讯作者：
S. Rinta-Antila;T. Eronen;V. Elomaa;U. Hager;J. Hakala;A. Jokinen;P. Karvonen;H. Penttilä;J. Rissanen;T. Sonoda;A. Saastamoinen;J. Äystö
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文献类型：
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作者：
S. Rinta-Antila;T. Eronen;V. Elomaa;U. Hager;J. Hakala;A. Jokinen;P. Karvonen;H. Penttilä;J. Rissanen;T. Sonoda;A. Saastamoinen;J. Äystö
在离子导向同位素分离器在线装置IGISOL上，采用充气潘宁阱产生用于衰变谱的等压纯离子束的新技术。用该技术研究了富中子同位素~（100）Zr、~（102）Zr和~（104）Zr的β衰变。此外，用高精度潘宁阱直接测量了锆和铌同位素的质量，确定了100、102、104 Zr β衰变的值。首次直接测量了~（104）Nb的质量，得到了长寿命（1+）态的质量过剩值为-71823 10 keV。对于100 Nb和102 Nb的基态，得到的质量过剩值分别为-79802 20 keV和-76309 10 keV。观测到的β强度分布支持100，102，104Zr同位素的长轴形变归属。
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-rich100Zr,102Zr and104Zr isotopes were studied with this technique. In addition, thevalues of100,102,104Zr β-decays were determined from the direct mass measurements of zirconium and niobium isotopes performed with a high-precision Penning trap. The mass of104Nb 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 of100Nb and102Nb 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 for100,102,104Zr isotopes.