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. 2020 Nov 2;5(45):28977-28983.
doi: 10.1021/acsomega.0c02883. eCollection 2020 Nov 17.

Isotopic Dependence of Vapor Pressure in Xenon

Amal Alamre  1 , Ibtesam Badhrees  1 , Brandon Death  1 , Caio Licciardi  2 , David Sinclair  1   3
Affiliations

Isotopic Dependence of Vapor Pressure in Xenon

Amal Alamre et al. ACS Omega. .

Abstract

The vapor pressure isotopic effect (VPIE) of xenon has been measured using cryogenic distillation. The still is calibrated with argon and krypton and yields a measurement of ln(p 130/p 136) ≃ (0.26 ± 0.04) × 10-3, where p 130 and p 136 are the vapor pressures of 130Xe and 136Xe at the nominal boiling point, respectively. The dependence of the VPIE across the isotopes for the three elements is found to be approximately linear with atomic mass, and all values are consistent with theoretical expectations.

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Conflict of interest statement

The authors declare no competing financial interest.

Figures

Figure 1
Figure 1
Experimental setup showing gas entering the top of the still, with samples extracted from the top and bottom to be sent to the mass spectrometer.
Figure 2
Figure 2
Mass spectra for (a) argon, (b) krypton, and (c) xenon.
Figure 3
Figure 3
Average fractional difference between the top and bottom of the column, δi, for each isotope of (a) argon, (b) krypton, and (c) xenon. The data can be described by a linear dependence on the isotopic mass mi, and results from the fit δi = p1mi + p0 are presented for each fluid.
Figure 4
Figure 4
VPIE between fluids isotopes as a function of (a) T* and (b) formula image. The lines represent values from numerical simulations for argon (dashed), krypton (dot-dashed), and xenon (solid), while the filled regions are the corresponding expectations from eq 23 accounting for uncertainties in the parameters. Open data points are those presented in Tables 1 and 2 for argon (diamonds), krypton (squares), and xenon (circle) representing the average for the same temperature, while solid points with error bars are measurements from this work.
See this image and copyright information in PMC

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