Isotopically Selective Condensation and Infrared-Laser-Assisted Gas-Dynamic Isotope Separation

Zellweger, J. M.; Philippoz, J. M.; Melinon, P.; Monot, R.; Bergh, Hubert van den

doi:10.1103/physrevlett.52.522

Cited by 46 publications

(11 citation statements)

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“…An inverted version of the messenger tagging technique for detecting ion absorption uses the fact that electronic and/or vibrational excitation of ions hinders formation of weakly-bound clusters. This effect, explored years ago in relation to laser isotope separation [82], has recently been demonstrated for spectroscopy of N 2 + ions, cooled to 10.6 K in a 22-pole trap by collisions with He and termed laserinduced inhibition of cluster growth (LIICG) [83]. An electronic spectrum is generated by monitoring the reduction of the steady-state concentration of ionHe complexes as a function of the excitation laser wavenumber.…”

Section: Spectroscopic Detection Of Ion Absorptionmentioning

confidence: 98%

Cryogenic Methods for the Spectroscopy of Large, Biomolecular Ions

Rizzo

Boyarkin

2014

Topics in Current Chemistry

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Determining the conformation of biological molecules is key for understanding their function. The recent combination of mass spectrometry, cryogenic ion traps, and laser spectroscopy is providing new methods to interrogate individual conformations of peptides and proteins that have advantages over classical techniques of structure determination. This chapter provides an overview of these new state-of-the-art methods and illustrates several specific applications. After reviewing the fundamentals of ion production, trapping, cooling, and spectroscopic detection, we review how different combinations of these techniques have been implemented in various laboratories around the world. We then focus on applications of cryogenic ion spectroscopy from two specific laboratories to illustrate the potential of this general approach. Finally, we outline ways in which these powerful new techniques could be further improved.

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Section: Spectroscopic Detection Of Ion Absorptionmentioning

confidence: 98%

Cryogenic Methods for the Spectroscopy of Large, Biomolecular Ions

Rizzo

Boyarkin

2014

Topics in Current Chemistry

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“…Production of weakly bound complexes in supersonic beams, also in ion spectroscopy, has been used . The method of selective heating with an IR laser has been used in isotope separation by selective inhibition of condensation with argon …”

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confidence: 99%

A Novel Method to Measure Electronic Spectra of Cold Molecular Ions

Chakrabarty

Holz

Campbell

et al. 2013

J. Phys. Chem. Lett.

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A universal method has been developed for measuring spectra of molecular ions in a 22-pole radio frequency trap at 5 K. It is based on laser induced inhibition of complex growth (LIICG). The first successful measurements have been demonstrated on the A 2Π u ← X 2Σ g + electronic transition with some thousand N2 + ions, helium densities of 1015 cm–3, and storage times of 1 s. The reduction of the number of N2 +–He complexes is the result of an interplay between excitation, radiative and collisional cooling, ternary association, and collision induced dissociation, which is explained by a kinetic model.

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“…SF 6 can be used as a target gas molecule due to its high equilibrium pressure of vapor at room temperature (no need in additional energy supply to prevent target gas condensation), and, for example, target isotopomer 33 SF 6 vibrational mode 33 3 ¼ 939 cm -1 can be selectively excited by 10 P(26) mode of CO 2 laser. Isotope shifts between neighbor isotopomers for corresponding mode are D 32ð34Þ 3 ¼ 8ð9Þcm -1 : In order to calculate SF 6 molecule excitation rate, we took experimental value from Ref.…”

Section: Optimal Design Of Experiments Setupmentioning

confidence: 99%

“…Viability of this method was originally demonstrated on the example of sulfur isotopes separation in SF 6 target gas mixed with argon. 6,7 In the case of separation scheme based on the selective condensation on cold walls, called as CRISLA-2 in Ref. 4, the last reaction is modified as i Q þ j Q þ open surface !…”

Section: Introductionmentioning

confidence: 99%

Some features of experimental setup design for isotopes separation by the laser assisted retardation of condensation method

Lyakhov¹,

Lee²

2015

Journal of Laser Applications

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In this paper, we propose optimal design of experimental setup for isotope separation by laser assisted retardation of condensation method. Optimal parameters for this setup can be found from the optimization criterion based on the transport model for rarefied gas flow dynamics in external laser field specifically tuned for selective excitation of target isotope [J. W. Eerkens, Laser Part. Beams 23, 225–253 (2005)]. Constrains applied by condensation dynamics were also considered. Because product cut and enrichment factor corresponding to the optimal conditions are rather small, isotopes in this setup should be recovered iteratively. Proposed method to calculate optimal parameters of experimental setup can be applied for arbitrary chemical element isotopes separation, where target isotopomer chemical structure should provide its highest efficiency. Optimal design of experimental setup operation is demonstrated on the example of sulfur isotopes separation.

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Isotopically Selective Condensation and Infrared-Laser-Assisted Gas-Dynamic Isotope Separation

Cited by 46 publications

References 1 publication

Cryogenic Methods for the Spectroscopy of Large, Biomolecular Ions

Cryogenic Methods for the Spectroscopy of Large, Biomolecular Ions

A Novel Method to Measure Electronic Spectra of Cold Molecular Ions

Some features of experimental setup design for isotopes separation by the laser assisted retardation of condensation method

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