简介:Adouble-slitghostinterferenceexperimentperformedonanentangledresourceusingtype-IInon-collineardegeneratespontaneousparametricdown-conversion(SPDC)isdemonstrated.Theinfluenceofthedistancebetweenthedouble-slitandthebucketdetectorprecededbyapinholeisstudied.Theexperimentalresultsshowthattheinterferencefringesbecomeincreasinglydistinctwithhighervisibilitywhenthepinhole-double-slitdistanceincreases.Afirst-orderclassicaltheorybasedontheKlyshko’stwo-photonadvanced-wavepicture,andasecond-orderquantum-imagetheoryareprovidedforexplanations.Thefittingresultsindicatethatthedivergenceoftheconvertedfluorescencesignificantlyaffectstheghostfringes.
简介:为了快速测定废氰化镀金溶液中Au,Cu,Ni,Fe四种元素含量,采用一步消解直接进行ICP-AES测定。并对分析谱线、元素干扰和等离子体参数进行了讨论。结果表明,方法检出限为0.014—0.019μg/ml,加标回收率在97.3—101.0%之间,相对标准偏差(RSD)小于2.54%。该方法准确、快速、简便。应用于废氰化镀金溶液的回收生产,结果令人满意。
简介:本文利用XRF金标样的多元素回归方程,对Pt、Pd的荧光强度进行修正,修正后的荧光强度当作Au、Ag的荧光强度代入回归方程中,利用计算机编程计算铂制品中的Pt、Au、Pd、Ag、Cu、Ni等6种元素的含量.该法测定的准确度优于0.5%,适用于Pt的测定范围为85%~99.92%,具有无损、快速、准确、可靠等优点.