Magnetic moment and electric quadrupole moment of the 18N ground state
Magnetic moment and electric quadrupole moment of the 18N ground state
复制标题
18N基态磁矩和电四极矩
DOI：
10.1016/s0370-2693(99)00219-1
复制
发表时间：
1999
影响因子：
4.4
通讯作者：
H. Miyatake
中科院分区：
文献类型：
--
作者：
H. Ogawa;K. Asahi;K. Sakai;A. Yoshimi;M. Tsuda;Y. Uchiyama;T. Suzuki;K. Suzuki;N. Kurokawa;M. Adachi;H. Izumi;H. Ueno;T. Shimoda;S. Tanimoto;N. Takahashi;W. Schmidt;M. Schäfer;S. Fukuda;A. Yoshida;M. Notani;T. Kubo;H. Okuno;H. Sato;N. Aoi;K. Yoneda;H. Iwasaki;N. Fukuda;N. Fukunishi;M. Ishihara;H. Miyatake
利用中能抛射碎裂反应中产生的碎片自旋极化，用β-NMR方法测定了丰中子核18 N的磁矩和电四极矩。为了保证在共振搜索之前存在足够的极化，我们提出了一种利用绝热场旋转测量极化的方案，并成功地应用于β-NMR实验。根据观察到的Pt阻止器中的共振，18 N基态的磁矩被确定为：|μ| =0.3279±0.0013μN。18 N碎片也被注入到单晶Mg塞子中，并且从观察到的四极频率|当量/小时|=73.2±1.4 kHz，电四极矩|Q|已推导出=12.3±1.2 mb。所得μ和Q值与壳模型计算值进行了比较。
The magnetic moment and electric quadrupole moment of a neutron-rich nucleus18N have been determined by the β-NMR method, taking advantage of the fragment spin polarization induced in the intermediate-energy projectile fragmentation reaction. To assure the existence of a sufficient polarization prior to the resonance search, a scheme of polarization measurement by means of an adiabatic field rotation has been developed and successfully incorporated in the β-NMR experiment. From the observed resonance in a Pt stopper the magnetic moment for the18N ground state has been determined to be |μ|=0.3279±0.0013μN. The18N fragments have also been implanted in a single crystal Mg stopper, and from the observed quadrupole frequency |eqQ/h|=73.2±1.4 kHz, the electric quadrupole moment |Q|=12.3±1.2 mb has been deduced. The obtained μ and Q are compared with shell model calculations.