主题：【讨论】不同二次偏振靶的应用

二次偏振靶共有三大类,一是BARKLA 靶, 二是BRAGG 靶, 三是PURE TARGET,不同的靶测定的元素的原子量不同,下面是一些相关的资料:
The use of a combination target consisting of an HOPG Bragg crystal and an Al203
Barkla scatterer for the excitation of the elements Na to U represents further progress in
the development of using polarized excitation in EDXRP. The high, integrated
reflectivity of the HOPG crystal improves detection limits and sensitivities for Na, Mg,
Al, Si, P and S-traces in light and heavy matrices in comparison with direct and
secondary target excitation. The A1203 target has proven itself to be a useful Barkla
uY-1s.l.t1tWer_e_r _ - f-o-ar t1h--eW eWx-r-Wits-lr-tli-nvn-- nvf- d~e_~m_e~n_~ta_~ 1Yw . .i t-1h- B d7 > ,2(j in w,. h-i-r-.ha -- tWhe-- W InVrh__ip__v.d W_ r-vbItIeIIr-tvin--n l_i_m__it_s_1 Y
are in the range >O.l ugg. The combination of the Al203 target and the HOPG crystal in
a multilayer, results in a polarization filter for the whole primary spectrum of an x-ray
tube, thus enabling overview analyses with measuring times I 100 s. Detection limits
between 1 - 50 pg/g are achieved for the elements Na - U.

您这有什么关于偏振靶的资料吗？能不能发给我看看。

这是什么仪器上用的？