High-resolution Zr-96(He-3,t) experiment and the matrix element for double-beta decay
High-resolution Zr-96(He-3,t) experiment and the matrix element for double-beta decay
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高分辨率Zr-96(He-3,t)实验及双β衰变矩阵元
DOI：
10.1103/physrevc.86.054323
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发表时间：
2012
影响因子：
3.1
通讯作者：
A. Tamii 他
中科院分区：
文献类型：
--
作者：
J. H. Thies;A. Tamii 他
在高分辨电荷交换实验中，研究了双β衰变核的伽莫特勒(GT)强度分布。这项实验是在大阪大学核物理研究中心(RCNP)进行的，入射氦束为420 MeV，磁谱仪为Grand Raiden。获得了32keV的末态能量分辨率。在694keV的单态下发现了很大一部分低能GT强度。在120keV分辨率的AMO(，He)Nb实验中也观察到了类似的GT强度。发现这一单态构成了双中微子双β()衰变的核矩阵元素的近100o.
The Gamow-Teller (GT) strength distribution has been investigated in a high-resolution (He,) charge-exchange experiment on the double-beta () decaying nucleusZr. The experiment was carried out at the Osaka University Research Center for Nuclear Physics (RCNP) with a 420 MeV incidentHe beam and the Grand Raiden magnetic spectrometer. A final-state energy resolution of 32 keV was achieved. A large fraction of the low-energy GTstrength is identified in a single state at 694 keV. A similar observation has been made in aMo(,He)Nb experiment at 120 keV resolution for the GTstrength. It is found that this single state makes up nearly 100of the nuclear matrix element for theZr two-neutrino double-beta () decay.