Isomeric 0+ state in 12Be
Isomeric 0+ state in 12Be
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12Be 中的异构 0 态
DOI：
10.1016/s0370-2693(03)00341-1
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发表时间：
2001
影响因子：
4.4
通讯作者：
N. Itagaki
中科院分区：
文献类型：
--
作者：
S. Shimoura;A. Saito;T. Minemura;Y. Matsuyama;H. Baba;H. Akiyoshi;N. Aoi;T. Gomi;Y. Higurashi;K. Ieki;N. Imai;N. Iwasa;H. Iwasaki;S. Kanno;S. Kubono;M. Kunibu;S. Michimasa;T. Motobayashi;Takashi Nakamura;H. Sakurai;M. Serata;E. Takeshita;S. Takeuchi;T. Teranishi;K. Ue;K. Yamada;Y. Yanagisawa;M. Ishihara;N. Itagaki
在Ex=2.24 MeV时，在12Be中发现了同分异构体0+态。通过测量来自飞行中的12Be核的两条γ射线，即12mBe→12Be∗(2+1)→12 Begs，确定了异构体，这是在100A MeV的18O轰击铍靶上产生的。通过两条γ射线的角关联，确定其自旋为0+。0+态的低激发能是12Be核N=8壳层闭合破裂的有力证据。
An isomeric 0+state in12Be was found at Ex=2.24 MeV. The isomer was identified by measuring coincident two γ-rays from in-flight12Be nuclei,12mBe→12Be∗(2+1)→12Beg.s., produced by the projectile fragmentation of18O at 100A MeV on a beryllium target. Its spin was determined to be 0+by the angular correlation of the two γ-rays. The low excitation energy of the 0+state is a strong evidence of the break of the N=8 shell closure in the12Be nucleus.