Study of nuclear structure of neutron rich double closed shell nuclei by on-line low temperature nuclear orientation method.

在质子数和中子数为“幻数”的原子核周围，核的稳定性增加得非常好。在这种核中，我们可以发现核结构中的高阶效应。到目前为止，这类研究主要围绕稳定核区进行；我们把它应用到富中子区。用在线核取向法测量了不稳定原子核49Sc （T1/2 = 57m）的磁矩。我们将结果与最近的核理论计算结果进行了比较。计算结果与我们的结果一致，但表明在稳定双闭壳核周围的理论计算还需要改进。

Around nucleus of which the number of protons and neutrons are the "magic number", the nuclear stability increases very well. In such nuclei, we can find the higher order effects in the nuclear structure. So far such study has been done around stable nuclear region; we apply it to neutron-rich region. We measured the magnetic moment of unstable nuclei 49Sc (T1/2 = 57m) by the on-line nuclear orientation method. We compared the result with recent nuclear theoretical calculations. The calculations agree with our results but it shows a need for improvement in theoretical calculation around stable doubly closed shell nuclei.