Coulomb dissociation of a halo nucleus 11Be at 72A MeV
Coulomb dissociation of a halo nucleus 11Be at 72A MeV
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晕核 11Be 在 72A MeV 下的库仑解离
DOI：
10.1016/0370-2693(94)91055-3
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发表时间：
1994
影响因子：
4.4
通讯作者：
M. Ishihara
中科院分区：
文献类型：
--
作者：
Takashi Nakamura;S. Shimoura;Toshio Kobayashi;T. Teranishi;K. Abe;N. Aoi;Y. Doki;M. Fujimaki;N. Inabe;N. Iwasa;K. Katori;T. Kubo;H. Okuno;T. Suzuki;I. Tanihata;Y. Watanabe;A. Yoshida;M. Ishihara
我们测量了72 A MeV的单中子晕核11Be在Pb靶上库仑离解时10 Be +n系统的激发能谱。我们已经确定了偶极强度分布dB（E1）/dEx，它在约800 keV的激发能量处显示出一个强峰。光谱形状与直接破碎模型一致。库仑后加速效应也被观察到支持直接破碎机制。库仑离解的E1优势被11Be静止坐标系中10 Be的角分布所证实。
We have measured the excitation energy spectrum of the10Be+n system in the Coulomb dissociation of the one-neutron-halo nucleus11Be on a Pb target at 72A MeV. We have determined the dipole strength distribution dB (E1) /dEx which shows a strong peak at about 800 keV excitation energy. The spectral shape is consistent with a direct breakup model. The Coulomb post accelaration effect has been observed also to support the direct breakup mechanism. The E1 dominance of the Coulomb dissociation is confirmed by observed angular distributions of10Be in the11Be rest frame.