Hyperfine-structure investigation in the 6s5d configuration of135Ba and137Ba
Hyperfine-structure investigation in the 6s5d configuration of135Ba and137Ba
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135Ba和137Ba 6s5d构型的超精细结构研究
DOI：
10.1007/bf01408538
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发表时间：
1979
期刊：
影响因子：
--
通讯作者：
A. Rosén
中科院分区：
文献类型：
--
作者：
M. Gustavsson;G. Olsson;A. Rosén
用原子束磁共振方法研究了135Ba和137Ba的6s5d组态亚稳态的超精细结构。亚稳态的钡状态是在原子束炉内的等离子体放电中填充的。从ABMR装置中出来的原子是用染料激光探测的。与传统方法相比，该技术具有状态选择性的优点。得到了下列磁偶极和电四极相互作用常数a和b：~（137）Ba：a（3D1）= − 520.536（3）MHzb（3D1）= 17.890（3）MHza（3D2 = 415.928（3）MHz b（3D2）= 25.899（13）MHza（3D3）= 456.559（4）MHzb3D3 = 47.390（16）MHz135Ba：a3D1 = − 465.166（4）MHzb（3D1）= 11.642（4）MHza（3D2）= 371.736（4）MHzb3D2 = 16.745（14）MHza（3D3）= 408.038（6）兆赫（3D~3）= 30.801（24）MHz。利用这些常数和以前已知的1D~2态的常数，用有效超精细结构分析了6s~5d组态的超精细结构。很好的哈密顿量。从分析中得到的超精细参数与理论计算值进行了比较相对论自洽场（SCF）波函数。四极矩的计算结果如下：Q（135 Ba）= 0.20（3）B和Q（137 Ba）= 0.34（4）B，未对四极屏蔽进行校正。
The hyperfine structure of the metastable states of the 6s5dconfiguration of135Ba and137Ba has been studied by the atomic-beam magnetic resonance (ABMR) method. The metastable barium states were populated in a plasma-discharge inside the atomic-beam oven. The atoms emerging from the ABMR-apparatus were detected by the use of a dyelaser. Compared to conventional methods this technique has the advantage of being state selective. The following magnetic dipole and electric quadrupole interaction constantsaandbhave been obtained:137Ba:a(3D1)=−520.536 (3) MHzb(3D1)=17.890 (3) MHza(3D2=415.928 (3) MHzb(3D2)=25.899 (13) MHza(3D3)=456.559 (4) MHzb3D3=47.390 (16) MHz135Ba:a3D1=−465.166 (4) MHzb(3D1)=11.642 (4) MHza(3D2)=371.736(4) MHzb3D2=16.745 (14) MHza(3D3)=408.038 (6) MHzb(3D3)=30.801 (24) MHzUsing these constants and the earlier known ones for the1D2state the hyperfine structure for the 6s5d configuration has been analyzed with an effective hyperfine hamiltonian. Hyperfine parameters obtained from the analysis have been compared with theoretical values calculated with relativistic self-consistent-field (SCF) wavefunctions. The quadrupole moments have been evaluated with the following result Q(135Ba) =0.20(3)b and Q(137Ba) = 0.34(4)b uncorrected for the quadrupole shielding.