Hyperfine interaction of 25Al in α-Al2O3 and its quadrupole moment
Hyperfine interaction of 25Al in α-Al2O3 and its quadrupole moment
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DOI：
10.1007/s10751-008-9686-9
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发表时间：
2007-11
影响因子：
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通讯作者：
K. Matsuta;M. Mihara;T. Nagatomo;R. Matsumiya;S. Momota;T. Ohtsubo;T. Izumikawa;H. Hirano;
中科院分区：
文献类型：
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作者：
K. Matsuta;M. Mihara;T. Nagatomo;R. Matsumiya;S. Momota;T. Ohtsubo;T. Izumikawa;H. Hirano;
首次利用β-NQR技术测量了短寿命核25Al的电四极矩。 25Al的自旋极化在重离子碰撞中产生，并在α-Al2O3单晶中保持长达2s，四极耦合频率为∣eqQ/h(25Al在Al2O3中)∣ = (4.05±0.30)MHz。根据结果，确定Q矩为∣Q(25Al)∣ = (240±20)mb。当前的 Q 矩比 OXBASH 代码计算的壳模型值 184 mb 大 30%，这可能显示核的额外变形。
The electric quadrupole (Q) moment of short-lived nucleus25Alhas been measured for the first time, by means of theβ-NQR technique. The spin polarization of25Al was produced in heavy ion collisions and was kept in aα-Al2O3single crystal for as long as 2 s and the quadrupole coupling frequency was obtained as ∣eqQ/h(25Al in Al2O3) ∣ = (4.05 ±0.30) MHz. From the result, theQmoment was determined as ∣Q(25Al)∣ = (240 ±20) mb. The presentQmoment is larger by 30% than the shell model value of 184 mb, calculated by OXBASH code, which may show additional deformation of the nucleus.