Direct evidence for a new giant resonance at 80A/sup -1///sup 3/ MeV in the lead region. [120 MeV, angular distributiotn, E0, E2, sum rules]
Direct evidence for a new giant resonance at 80A/sup -1///sup 3/ MeV in the lead region. [120 MeV, angular distributiotn, E0, E2, sum rules]
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直接证据表明在先导区域存在 80A/sup -1///sup 3/ MeV 的新巨共振。
DOI：
10.1103/physrevlett.38.676
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发表时间：
1977
影响因子：
8.6
通讯作者：
F. Bertrand
中科院分区：
文献类型：
--
作者：
M. Harakeh;K. Borg;T. Ishimatsu;H. Morsch;A. Woude;F. Bertrand
在Pb 20 6、20 8、Au 197和Bi 209上进行的120 MeV的非弹性α散射实验表明，除了已知的~ 63 a−1 3 MeV的共振外，还存在一个新的位于~ 80 a−1 3 MeV的等标量共振。这个新共振的角分布，虽然与e4分配不一致，但用e0或e2来描述更好。它将分别耗尽相应的等标量e0、e2或e4能量加权和规则的大约100%、50%或17%。
Inelastic α scattering experiments at 120 MeV on Pb 2 0 6, 2 0 8, Au 197, and Bi 209 reveal the existence of a new isoscalar resonance located at∼ 80 A− 1 3 MeV in addition to the well-known resonance at∼ 63 A− 1 3 MeV. The angular distribution of this new resonance, though not inconsistent with an E 4 assignment, is better described by E 0 or E 2. It would exhaust approximately 100%, 50%, or 17% of the corresponding isoscalar E 0, E 2, or E 4 energy-weighted sum rules, respectively.