来自¹²¹Pr的基态质子放射性：这种奇特的核衰变模式是何时首次被发现的？
Ground state proton radioactivity from 121Pr: when was this exotic nuclear decay mode first discovered?
作者信息
Robinson A P, Woods P J, Seweryniak D, Davids C N, Carpenter M P, Hecht A A, Peterson D, Sinha S, Walters W B, Zhu S
机构信息
School of Physics, The University of Edinburgh, Edinburgh EH9 3JZ, Scotland, UK.
出版信息
Phys Rev Lett. 2005 Jul 15;95(3):032502. doi: 10.1103/PhysRevLett.95.032502. Epub 2005 Jul 12.
Ground-state proton radioactivity has been identified from 121Pr. A transition with a proton energy of E(p)=882(10) keV [Q(p)=900(10) keV] and half-life t(1/2)=10(+6)(-3) ms has been observed and is assigned to the decay of a highly prolate deformed 3/2(+) or 3/2(-) Nilsson state. The present result is found to be incompatible with a previously reported observation of ground-state proton radioactivity from 121Pr, which would have represented the discovery of this phenomenon.
已从¹²¹Pr中识别出基态质子放射性。观测到一个质子能量为E(p)=882(10) keV [Q(p)=900(10) keV]且半衰期t(1/2)=10(⁺⁶)(⁻³) ms的跃迁，并将其归因于一个高度长椭形变的3/2(⁺)或3/2(⁻)尼尔森态的衰变。发现目前的结果与先前报道的¹²¹Pr基态质子放射性观测结果不相符，而先前的观测本可代表这一现象的发现。
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