Precision mass measurements of neutron halo nuclei using the TITAN Penning trap
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- 作者：1. TRIUMF ; 4004 Wesbrook Mall ; Vancouver ; BC ; Canada V6T 2A32. Department of Physics and Astronomy ; University of British Columbia ; 6224 Agricultural Road ; Vancouver ; BC ; Canada V6T 1Z13. Physik Department E12 ; Technische Universit盲t M眉nchen ; James Franck Str. ; 85748 Garching ; Germany4. Max-Planck-Institut f眉r Kernphysik ; Saupfercheckweg 1 ; 69117 Heidelberg ; Germany5. TRIUMF ; 4004 Wesbrook Mall ; Vancouver V6T 2A3 ; BC ; Canada6. CSNSM-IN2P3-CNRS ; Universit茅 Paris 11 ; B芒timents 104 et 108 ; 91405 Orsay Campus ; France
- 关键词：Halo nuclei – ; Penning trap – ; Mass measurement – ; Nuclear theory
- 刊名：Hyperfine Interactions
- 出版时间：July 2011
- 出版年：2011
- 期刊代码：18_03043843
- 类别：cp
- 卷：199
- 期：1-3
- 页码：167-173
- 数据来源：sp
摘要
Precise atomic mass determinations play a key role in various fields of physics, including nuclear physics, testing of fundamental symmetries and constants and atomic physics. Recently, the TITAN Penning trap measured the masses of several neutron halos. These exotic systems have an extended, diluted, matter distribution that can be modelled by considering a nuclear core surrounded by a halo formed by one or more of loosely bound neutrons. Combined with laser spectroscopy measurements of isotopic shifts precise masses can be used to obtain reliable charge radii and two-neutron-seperation energies for these halo nuclei. It is shown that these results can be used as stringent tests of nuclear models and potentials providing an important metric for our understanding of the interactions in all nuclei.