英语翻译The phenomena that both phosphors have two differentemis

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英语翻译
The phenomena that both phosphors have two different
emission peaks can be explained by the fact that Eu2+ may
occupy two different lattice sites in the host crystal lattice.
In Ca2MgSi2O7 crystal structure,the coordination number of
calcium can be 6 and 8.Therefore,Ca2+ can occupy two
alternative lattice sites,the eight-coordinated Ca2+ site (Ca1
site) and the six-coordinated Ca2+ site (Ca2 site),as shown
in Fig.3.When Eu2+ enters the lattice,it will only replace
the original Ca2+ sites.So,Eu2+ will occupy two different
lattice sites (Eu1 and Eu2) with coordination numbers of 6
or 8.After activation,Eu1 and Eu2 would be activated into
different energy levels,thus resulting in different emission
spectra.Since the crystal structure of Sr2MgSi2O7 is similar
to that of Ca2MgSi2O7,it can be inferred that,when Eu2+
replaces Sr2+ in the Sr2MgSi2O7 host,Eu2+ can also occupy
the different lattice sites with coordination numbers of 6 or
8,which leads to the two different emission peaks.

两个磷原子有两个不同发射峰的现象可以用Eu2+在基质晶格上占据两种不同的格点来解释.在Ca2MgSi2O7晶体结构中,钙的配位数可以是6或8.因此,有两种不同格点可供Ca2+占据,配位数8的Ca2+点(Ca1点)和配位数6的Ca2+点(Ca2点),如图3所示.当Eu2+进入晶格时,只能替代原先的Ca2+点.所以,Eu2+占据两种不同的格点(Eu1点和Eu2点),其配位数分别为6和8.激活后,Eu1和Eu2会被激活到不同能级,从而导致不同的发射谱.因为Sr2MgSi2O7的晶体结构与Ca2MgSi2O7相似,可以由此推论,当Eu2+在Sr2MgSi2O7基质中替代Sr2+时,Eu2+也可以占据配位数分别为6和8的不同格点,导致两个不同的发射峰.

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