在巨正则模型下,利用两相似反应系统的同质异位素产额比之差(Isobaric yield ratio difference,IBD),研究中等质量余核化学势与反应系统的关联。结果表明,两相似反应系统的Δμ/T之差Δμ21/T对两反应系统双中质比(N/Z)21很敏感,说明Δ...在巨正则模型下,利用两相似反应系统的同质异位素产额比之差(Isobaric yield ratio difference,IBD),研究中等质量余核化学势与反应系统的关联。结果表明,两相似反应系统的Δμ/T之差Δμ21/T对两反应系统双中质比(N/Z)21很敏感,说明Δμ/T对反应系统具有依赖性。同时发现,当(N/Z)21=1.17时,两反应系统不同余核的Δμ21/T趋于一个常数,说明在这两个系统中,利用IBD和同位旋标度方法获得的对称能信息更合理,且符合得更好。展开更多
An isobaric interference of CNO for boron isotopic measurement by negative thermal ionization mass spectrometry (NTIMS) has been studied. The result shows that the CNOis not only from the organic material, but also is...An isobaric interference of CNO for boron isotopic measurement by negative thermal ionization mass spectrometry (NTIMS) has been studied. The result shows that the CNOis not only from the organic material, but also is from nitrate in loading reagent in NTIMS. Monitoring the mass 43 ion intensity and 43/42 ratio of blank are necessary for the boron isotopic measurement in NTIMS, other than boron content examining only.展开更多
The state-of-art of the isotopic analysis technique in the laser resonance ionization mass spectrometry (LRIMS) in northwest institute of nuclear technology was founded. Main technique obstacles and feasible resolvent...The state-of-art of the isotopic analysis technique in the laser resonance ionization mass spectrometry (LRIMS) in northwest institute of nuclear technology was founded. Main technique obstacles and feasible resolvents with the application of 1,RIMS in isotopic analysis were discussed. In order to obtain accurate isotope ratio determined by LRIMS, the new method combined with experimental process and correction factor calculated by numerical computation method was proposed and applied to measure lutetium isotope ratio. The natural lutetium isotope ratio determined by use of this method was less than 0.8% by thermal ionization mass spectrometry (TIMS), This method can also be applied to determine abundance ratios of some other elements.展开更多
In this paper, Interferential Additions Calibration (IAC) which can be used to measure isotope abundance ratio by inductively coupled plasma-mass spectrometry (ICPMS) in the presence of isobaric interference was illus...In this paper, Interferential Additions Calibration (IAC) which can be used to measure isotope abundance ratio by inductively coupled plasma-mass spectrometry (ICPMS) in the presence of isobaric interference was illustrated. In this method, it is only required that the isotope ratios of interferential element added to the sample must be the same as the analyte, and moreover, their accurate values must not be required. Compared with direct calibration, the IAC has more advantages in terms of practicability. Especially, the IAC can be used to remove the spectral interference caused by the tailing of strong peak or combined-ion. As an example, this method was be used to determine the abundance ratio of ^176Lu and ^175Lu in the presence of isobar Yb. The result met well with certificated value.展开更多
文摘在巨正则模型下,利用两相似反应系统的同质异位素产额比之差(Isobaric yield ratio difference,IBD),研究中等质量余核化学势与反应系统的关联。结果表明,两相似反应系统的Δμ/T之差Δμ21/T对两反应系统双中质比(N/Z)21很敏感,说明Δμ/T对反应系统具有依赖性。同时发现,当(N/Z)21=1.17时,两反应系统不同余核的Δμ21/T趋于一个常数,说明在这两个系统中,利用IBD和同位旋标度方法获得的对称能信息更合理,且符合得更好。
文摘An isobaric interference of CNO for boron isotopic measurement by negative thermal ionization mass spectrometry (NTIMS) has been studied. The result shows that the CNOis not only from the organic material, but also is from nitrate in loading reagent in NTIMS. Monitoring the mass 43 ion intensity and 43/42 ratio of blank are necessary for the boron isotopic measurement in NTIMS, other than boron content examining only.
文摘The state-of-art of the isotopic analysis technique in the laser resonance ionization mass spectrometry (LRIMS) in northwest institute of nuclear technology was founded. Main technique obstacles and feasible resolvents with the application of 1,RIMS in isotopic analysis were discussed. In order to obtain accurate isotope ratio determined by LRIMS, the new method combined with experimental process and correction factor calculated by numerical computation method was proposed and applied to measure lutetium isotope ratio. The natural lutetium isotope ratio determined by use of this method was less than 0.8% by thermal ionization mass spectrometry (TIMS), This method can also be applied to determine abundance ratios of some other elements.
文摘In this paper, Interferential Additions Calibration (IAC) which can be used to measure isotope abundance ratio by inductively coupled plasma-mass spectrometry (ICPMS) in the presence of isobaric interference was illustrated. In this method, it is only required that the isotope ratios of interferential element added to the sample must be the same as the analyte, and moreover, their accurate values must not be required. Compared with direct calibration, the IAC has more advantages in terms of practicability. Especially, the IAC can be used to remove the spectral interference caused by the tailing of strong peak or combined-ion. As an example, this method was be used to determine the abundance ratio of ^176Lu and ^175Lu in the presence of isobar Yb. The result met well with certificated value.
