Electromagnetic transition from the 4+ to 2+ resonance in 8Be measured via the radiative capture in 4He + 4He.
Electromagnetic transition from the 4+ to 2+ resonance in 8Be measured via the radiative capture in 4He + 4He.
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通过 4He 4He 中的辐射捕获测量 8Be 中从 4 共振到 2 共振的电磁跃迁。
DOI：
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发表时间：
2013
影响因子：
8.6
通讯作者：
P. Sugathan
中科院分区：
文献类型：
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作者：
V. Datar;D. Chakrabarty;Suresh Kumar;V. Nanal;S. Pastore;R. Wiringa;S. Behera;A. Chatterjee;D. Jenkins;C. Lister;E. T. Mirgule;A. Mitra;R. G. Pillay;K. Ramachandran;O. Roberts;P. Rout;A. Shrivastava;P. Sugathan
早期对8Be中4+到2+辐射跃迁的测量提供了其哑铃状形状的第一个电磁特征。然而，在测量截面的大的不确定性不允许严格的核结构模型的测试。这封信报告了一个更详细和精确的测量，通过4He + 4He反应中的辐射捕获，将精度提高了约3倍。用改进的三核子力从头计算了辐射跃迁强度。实验结果与α团簇模型和从头计算的预测进行了比较。
An earlier measurement on the 4+ to 2+ radiative transition in 8Be provided the first electromagnetic signature of its dumbbell-like shape. However, the large uncertainty in the measured cross section does not allow a stringent test of nuclear structure models. This Letter reports a more elaborate and precise measurement for this transition, via the radiative capture in the 4He + 4He reaction, improving the accuracy by about a factor of 3. Ab initio calculations of the radiative transition strength with improved three-nucleon forces are also presented. The experimental results are compared with the predictions of the alpha cluster model and ab initio calculations.