UF6 enrichment measurements using TDLS techniques

Berezin, A. G.; Malyugin, S. L.; Nadezhdinskii, Alexander I.; Namestnikov, D.Yu.; Ponurovskii, Ya. Ya.; Stavrovskiĭ, D. B.; Shapovalov, Yu. P.; Vyazov, I.E.; Zaslavskii, V. Ya.; Selivanov, Yu. G.; Gorshunov, N. M.; Grigoriev, G. Y.; Набиев, Ш. Ш.

doi:10.1016/j.saa.2006.10.037

Cited by 17 publications

(21 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An experimental setup consisting of a diode laser spectrometer and a vacuum-gas bench for sample preparation was developed to study the absorption spectra of 238 UF 6 and 235 UF 6 . The corrosion-resistant steel bench included vessels for storing 235 UF 6 , 238 UF 6 , F 2 , and inert gases and sensors for measuring pressure and temperature.…”

Section: Ufmentioning

confidence: 99%

“…The experiments showed that at least 0.1-0.2 vol.% HF was present in the UF 6 sample even after cryogenic cleaning. Thus, the uranium hexafluoride partial pressure is measured with an error, which can result in an error in determining the isotopic ratio 235 UF 6 / 238 UF 6 .…”

Section: Ufmentioning

confidence: 99%

“…The HITRAN spectral database [7] was used to determine the tuning range of the laser 1289.66-1292.36 cm −1 experimentally. Figure 2b shows the absorption spectrum of uranium hexafluoride and the absorption lines of acetyline and methane, which were used to stabilize the temperature of the diode laser and for absolute referencing of the frequency scale of the absorption spectra of UF 6 .…”

Section: Ufmentioning

confidence: 99%

“…On the basis of these spectra and the known isotopic shaft of the ν 3 vibration of UF 6 molecules, model spectra were calculated for the two isotopic modifications 238 UF 6 and 235 UF 6 . However, the accuracy with which the degree of enrichment of UF 6 is determined on the basis of the model spectra was found to be too low for measuring the isotopic composition of uranium under real conditions [6]. To increase the accuracy with which the isotopic ratio 235 UF 6 / 238 UF 6 , it is necessary to know the real spectroscopic characteristics of UF 6 molecules with different isotopic composition.…”

mentioning

confidence: 99%

“…The fundamental possibility of using laser spectroscopy for fast analysis of the degree of enrichment of UF 6 was shown in [5,6], where the IR spectra obtained for uranium hexafluoride by Fourier transformation were analyzed and the choice of the lasing frequency in the mid-IR range at the wavelength λ = 7.68 µm was substantiated. The IR absorption spectra of UF 6 with the natural isotopic composition were studied using such a laser in the range of the composite vibrational band ν 1 + ν 3 .…”

mentioning

confidence: 99%

See 4 more Smart Citations

Investigation of 235UF6 and 238UF6 spectra in the mid-IR range

et al. 2008

Self Cite

View full text Add to dashboard Cite

A diode laser is used to measure the absorption spectra of 238 UF 6 and 235 UF 6 molecules in the composite vibrational band ν 1 + ν 3 at wavelength λ = 7.68 µm. To determine the possibility of measuring the isotopic ratio 235 UF 6 / 238 UF 6 with the required accuracy, the absorption coefficients of isotopic samples of 235 UF 6 and 238 UF 6 are measured, and the sources of errors and ways to minimize them are determined.The isotopic composition of uranium hexafluoride, found in the chemical form UF 6 , is measured in separation plants to a high degree of accuracy using gamma spectrometers and specialized mass spectrometers [1]. But at the same time a sufficiently reliable, accurate, and rapid method for evaluating the degree of enrichment of UF 6 when checking research laboratories and facilities which are under IAEA control is not available.At the present time, diode laser spectroscopy is one of the most promising rapid methods of isotopic analysis for obtaining reliable information about the degree of enrichment of UF 6 [2]. An important feature is its high sensitivity and resolving power, and the possibility of tuning the wavelength of the laser radiation smoothly makes it possible to measure the isotopic composition of atoms and molecules containing stable and radioactive nuclei [3,4].The fundamental possibility of using laser spectroscopy for fast analysis of the degree of enrichment of UF 6 was shown in [5,6], where the IR spectra obtained for uranium hexafluoride by Fourier transformation were analyzed and the choice of the lasing frequency in the mid-IR range at the wavelength λ = 7.68 µm was substantiated. The IR absorption spectra of UF 6 with the natural isotopic composition were studied using such a laser in the range of the composite vibrational band ν 1 + ν 3 . The absorption coefficient in this band is 500 times lower than the absorption coefficient in the ground vibrational band ν 3 but it is sufficient for measuring the IR absorption spectra in 10-20 cm long cells. On the basis of these spectra and the known isotopic shaft of the ν 3 vibration of UF 6 molecules, model spectra were calculated for the two isotopic modifications 238 UF 6 and 235 UF 6 . However, the accuracy with which the degree of enrichment of UF 6 is determined on the basis of the model spectra was found to be too low for measuring the isotopic composition of uranium under real conditions [6]. To increase the accuracy with which the isotopic ratio 235 UF 6 / 238 UF 6 , it is necessary to know the real spectroscopic characteristics of UF 6 molecules with different isotopic composition.In the present work, the IR absorption spectra of 235 UF 6 , 238 UF 6 , and mixtures of these compounds are studied experimentally in the region of the composite vibration ν 1 + ν 3 using a λ = 7.68 µm diode laser. Special attention is focused on the measurement of the absorption cross sections of the two isotopic modifications of uranium hexafluoride 238 UF 6 and

show abstract

Section: Ufmentioning

confidence: 99%

Section: Ufmentioning

confidence: 99%