Trace analysis of radioisotopes by laser spectroscopy and mass spectrometry

Strashnov, I.; Fernando, Ruchira; Izosimov, I. N.

doi:10.1007/s10967-019-06899-7

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…Gennady V. Mishinsky which allow X-ray microprobe analysis of substances and materials. Researchers have now the opportunity, to obtain, with extreme sensitivity levels [1], independent, reliable information about the mass, elemental composition of both geological samples and materials obtained in various experiments.…”

Section: Towards a New Paradigmmentioning

confidence: 99%

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Towards a New Paradigm

Mishinsky¹

2020

RENSIT

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Section: Towards a New Paradigmmentioning

confidence: 99%

“…The minus sign describes fermions, i.e. particles with half-integer spin, s = ћ/2, 3ћ/2... Fermions obey the Fermi-Dirac statistics, in which the sign of the wave function(1,2)…”

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confidence: 99%

Towards a New Paradigm

Mishinsky¹

2020

RENSIT

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“…Resonance ionization mass spectrometry (RIMS) is one of the most sensitive techniques for ultra-trace analysis of long-lived radionuclides such as the isotopes of actinides 9 – 14 . In RIMS, ions are formed by stepwise resonant absorption of two or three photons through allowed atomic levels to photoionization.…”

Section: Introductionmentioning

confidence: 99%

High efficiency laser resonance ionization of plutonium

Galindo-Uribarri

Liu

Romero

et al. 2021

Sci Rep

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Three-step resonance photoionization spectra of plutonium have been studied with Ti:Sapphire lasers for the development of efficient laser ionization schemes for ultra-trace analysis of Pu isotopes by resonance ionization mass spectrometry. We observed eighteen intermediate excited states of even parity in the energy range 35568–36701 $${\text {cm}}^{-1}$$ cm - 1 , thirteen of them have not been previously documented, and a larger number of high-lying excited states and autoionizing states of odd-parity between 48238 and 49510 $${\text {cm}}^{-1}$$ cm - 1 . Three-color, three-photon ionization schemes via six intermediate states were evaluated under similar ion source operating conditions. This led to a highly efficient three-step scheme with an overall ionization efficiency of $$51.1 \pm 1.3\%$$ 51.1 ± 1.3 % , which is an order of magnitude improvement over the previously reported ionization efficiency for Pu.

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Actinide isotope analysis and trace element composition of bones of prehistoric animals and humans by inductively coupled plasma mass spectrometry (ICP-MS)

Nesmiyan,

Ragazzon-Smith,

Saidullaev

et al. 2024

J Radioanal Nucl Chem

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Inductively coupled plasma mass spectrometry (ICP-MS) has been used for analysis of the bones of archanthropus, ancient bear, southern mammoths, dinosaurs, as well as soils collected in various parts of Uzbekistan. The concentrations of 64 elements have been detected including thorium and uranium for which isotope compositions were also analysed. The comparison of the ICP-MS data with the results we obtained earlier for some bones using instrumental neutron activation analysis (INAA) is presented. The concentrations of 234, 235, 238U are up to two orders of magnitude elevated compared to the soils (e.g.238U in south mammoth bone—130.1 mg/kg, and that of soil is only 1.6 mg/kg). The levels of 236U, and 239, 240, 242, 244Pu isotopes (possible neutron capture products of 235U and 238U) correspond to a count rate of blank samples. In addition, the isotope analysis confirms the uranium in the bones and surrounding soils is natural (the average determined for all samples uranium ratios 235U/238U = 0.0071 ± 0.0003 (2-sigma errors). The concentration of 230Th (which is the part of 234U and 238U decay chain) is also elevated in the bones compared to the surrounding soils, however, the concentrations of stable 232Th largely correspond to those of the soil. The excess uranium detected in bones is most probably due to the preferential accumulation from soil, and not to the paleo diet.

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Trace analysis of radioisotopes by laser spectroscopy and mass spectrometry

Cited by 6 publications

References 27 publications

Towards a New Paradigm

Towards a New Paradigm

High efficiency laser resonance ionization of plutonium

Actinide isotope analysis and trace element composition of bones of prehistoric animals and humans by inductively coupled plasma mass spectrometry (ICP-MS)

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