TES microcalorimeter SEM-EDS system for rare-earth elements analyses

Seiichiro Uehara, Yasuhiro Takai, Yohei Shirose, Yuki Fujii

研究成果: ジャーナルへの寄稿レター

抄録

Objective: A field-emission scanning electron microscope (FE-SEM) with energy-dispersive X-ray spectrometer (EDS)detector of a superconducting transition-edge sensor (TES) microcalorimeter is a new system for electron-microprobe chemical analyses. FE-SEM with TES was used for qualitative and semi-quantitative analyses of rareearth elements (REE) at a low accelerating voltage of 5 kV. Four characteristic M-lines were detected in the LaB 6 spectrum: LaMζ at 640, LaMαβ at 841, LaMγ at 1021, and a weak line (M 2N 4 transition) at 1100 eV. The spectra of other rare-earth borides, rare-earth phosphates, and monazite were assigned in the same way as the La M-lines were. For quantitative analyses, we used a calibration curve method, using standard specimens of known chemical compositions. Linear calibration curves for plots of P, Ca, La, Ce, Pr, andNd intensities versus each weight percentage were obtained. Semi-quantitative analyses of rare-earth minerals should be c rried out at low accelerating voltages using a calibration curve method. In a TES-EDS system, a low accelerating voltage can be used to improve the spatial resolution, without the sensitivity disadvantages of low-energy X-ray emissions. Moreover, a strong increase in the Mαβ intensity with increasing atomic number Z was seen, so the detection limits of heavy REE as much lower than those of light REEs. These results suggest that the TES-EDS system could be a useful analytical tool in rare-earth mineralogy.

元の言語英語
ページ(範囲)105-109
ページ数5
ジャーナルJournal of Mineralogical and Petrological Sciences
107
発行部数2
DOI
出版物ステータス出版済み - 9 4 2012

Fingerprint

calorimeters
rare earth element
rare earth elements
scanning electron microscopy
sensor
sensors
calibration
field emission
electric potential
curves
electron
electron microscopes
monazite
electron probe analysis
scanning
borides
energy
heavy elements
mineralogy
spatial resolution

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geology

これを引用

TES microcalorimeter SEM-EDS system for rare-earth elements analyses. / Uehara, Seiichiro; Takai, Yasuhiro; Shirose, Yohei; Fujii, Yuki.

:: Journal of Mineralogical and Petrological Sciences, 巻 107, 番号 2, 04.09.2012, p. 105-109.

研究成果: ジャーナルへの寄稿レター

Uehara, Seiichiro ; Takai, Yasuhiro ; Shirose, Yohei ; Fujii, Yuki. / TES microcalorimeter SEM-EDS system for rare-earth elements analyses. :: Journal of Mineralogical and Petrological Sciences. 2012 ; 巻 107, 番号 2. pp. 105-109.
@article{5ae38359ec664ccdbbe11bbbaa040d9d,
title = "TES microcalorimeter SEM-EDS system for rare-earth elements analyses",
abstract = "Objective: A field-emission scanning electron microscope (FE-SEM) with energy-dispersive X-ray spectrometer (EDS)detector of a superconducting transition-edge sensor (TES) microcalorimeter is a new system for electron-microprobe chemical analyses. FE-SEM with TES was used for qualitative and semi-quantitative analyses of rareearth elements (REE) at a low accelerating voltage of 5 kV. Four characteristic M-lines were detected in the LaB 6 spectrum: LaMζ at 640, LaMαβ at 841, LaMγ at 1021, and a weak line (M 2N 4 transition) at 1100 eV. The spectra of other rare-earth borides, rare-earth phosphates, and monazite were assigned in the same way as the La M-lines were. For quantitative analyses, we used a calibration curve method, using standard specimens of known chemical compositions. Linear calibration curves for plots of P, Ca, La, Ce, Pr, andNd intensities versus each weight percentage were obtained. Semi-quantitative analyses of rare-earth minerals should be c rried out at low accelerating voltages using a calibration curve method. In a TES-EDS system, a low accelerating voltage can be used to improve the spatial resolution, without the sensitivity disadvantages of low-energy X-ray emissions. Moreover, a strong increase in the Mαβ intensity with increasing atomic number Z was seen, so the detection limits of heavy REE as much lower than those of light REEs. These results suggest that the TES-EDS system could be a useful analytical tool in rare-earth mineralogy.",
author = "Seiichiro Uehara and Yasuhiro Takai and Yohei Shirose and Yuki Fujii",
year = "2012",
month = "9",
day = "4",
doi = "10.2465/jmps.111020d",
language = "English",
volume = "107",
pages = "105--109",
journal = "Journal of Mineralogical and Petrological Sciences",
issn = "1345-6296",
publisher = "Tohoku University",
number = "2",

}

TY - JOUR

T1 - TES microcalorimeter SEM-EDS system for rare-earth elements analyses

AU - Uehara, Seiichiro

AU - Takai, Yasuhiro

AU - Shirose, Yohei

AU - Fujii, Yuki

PY - 2012/9/4

Y1 - 2012/9/4

N2 - Objective: A field-emission scanning electron microscope (FE-SEM) with energy-dispersive X-ray spectrometer (EDS)detector of a superconducting transition-edge sensor (TES) microcalorimeter is a new system for electron-microprobe chemical analyses. FE-SEM with TES was used for qualitative and semi-quantitative analyses of rareearth elements (REE) at a low accelerating voltage of 5 kV. Four characteristic M-lines were detected in the LaB 6 spectrum: LaMζ at 640, LaMαβ at 841, LaMγ at 1021, and a weak line (M 2N 4 transition) at 1100 eV. The spectra of other rare-earth borides, rare-earth phosphates, and monazite were assigned in the same way as the La M-lines were. For quantitative analyses, we used a calibration curve method, using standard specimens of known chemical compositions. Linear calibration curves for plots of P, Ca, La, Ce, Pr, andNd intensities versus each weight percentage were obtained. Semi-quantitative analyses of rare-earth minerals should be c rried out at low accelerating voltages using a calibration curve method. In a TES-EDS system, a low accelerating voltage can be used to improve the spatial resolution, without the sensitivity disadvantages of low-energy X-ray emissions. Moreover, a strong increase in the Mαβ intensity with increasing atomic number Z was seen, so the detection limits of heavy REE as much lower than those of light REEs. These results suggest that the TES-EDS system could be a useful analytical tool in rare-earth mineralogy.

AB - Objective: A field-emission scanning electron microscope (FE-SEM) with energy-dispersive X-ray spectrometer (EDS)detector of a superconducting transition-edge sensor (TES) microcalorimeter is a new system for electron-microprobe chemical analyses. FE-SEM with TES was used for qualitative and semi-quantitative analyses of rareearth elements (REE) at a low accelerating voltage of 5 kV. Four characteristic M-lines were detected in the LaB 6 spectrum: LaMζ at 640, LaMαβ at 841, LaMγ at 1021, and a weak line (M 2N 4 transition) at 1100 eV. The spectra of other rare-earth borides, rare-earth phosphates, and monazite were assigned in the same way as the La M-lines were. For quantitative analyses, we used a calibration curve method, using standard specimens of known chemical compositions. Linear calibration curves for plots of P, Ca, La, Ce, Pr, andNd intensities versus each weight percentage were obtained. Semi-quantitative analyses of rare-earth minerals should be c rried out at low accelerating voltages using a calibration curve method. In a TES-EDS system, a low accelerating voltage can be used to improve the spatial resolution, without the sensitivity disadvantages of low-energy X-ray emissions. Moreover, a strong increase in the Mαβ intensity with increasing atomic number Z was seen, so the detection limits of heavy REE as much lower than those of light REEs. These results suggest that the TES-EDS system could be a useful analytical tool in rare-earth mineralogy.

UR - http://www.scopus.com/inward/record.url?scp=84865547963&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865547963&partnerID=8YFLogxK

U2 - 10.2465/jmps.111020d

DO - 10.2465/jmps.111020d

M3 - Letter

VL - 107

SP - 105

EP - 109

JO - Journal of Mineralogical and Petrological Sciences

JF - Journal of Mineralogical and Petrological Sciences

SN - 1345-6296

IS - 2

ER -