scholarly journals Sub-Hz Differential Rotational Spectroscopy of Enantiomers

Symmetry ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 28
Author(s):  
Lincoln Satterthwaite ◽  
Greta Koumarianou ◽  
Daniel Sorensen ◽  
David Patterson
Keyword(s):  
Parity Violation ◽  
Rotational Spectroscopy ◽  
Buffer Gas ◽  
Structural Effects ◽  
Gas Cell ◽  
Pulsed Jet ◽  
Fabry Perot ◽  
Systematic Effects ◽  
First Time ◽  
Opening Up

We demonstrate for the first time high-precision differential microwave spectroscopy, achieving sub-Hz precision by coupling a cryogenic buffer gas cell with a tunable microwave Fabry–Perot cavity. We report statistically limited sub-Hz precision of (0.08 ± 0.72) Hz, observed between enantiopure samples of (R)-1,2-propanediol and (S)-1,2-propanediol at frequencies near 15 GHz. We confirm highly repeatable spectroscopic measurements compared to traditional pulsed-jet methods, opening up new capabilities in probing subtle molecular structural effects at the 10−10 level and providing a platform for exploring sources of systematic error in parity-violation searches. We discuss dominant systematic effects at this level and propose possible extensions of the technique for higher precision.

scholarly journals sub-Hz Differential Rotational Spectroscopy of Enantiomers

2021 ◽  
Author(s):  
Lincoln Satterthwaite ◽  
Greta Koumarianou ◽  
Daniel Sorensen ◽  
David Patterson
Keyword(s):  
Molecular Spectroscopy ◽  
Buffer Gas ◽  
Chiral Molecules ◽  
Buffer Gas Cooling ◽  
Pulsed Jet ◽  
Systematic Effects ◽  
Gas Cooling ◽  
The Difference ◽  
Microwave Regime ◽  
First Time

Observation of parity-violating effects in chiral molecules is a long-standing challenge of the molecular spectroscopy community. In the microwave regime, the difference in transition frequencies between enantiomers is predicted to be below the mHz level, which is considerably beyond current experimental capabilities. The most promising future efforts combine vibrational spectroscopy, buffer gas cooling, and carefully chosen molecular candidates with large predicted parity-violating shifts. Here, we demonstrate for the first time high-precision differential microwave spectroscopy, achieving sub-Hz precision by coupling a cryogenic buffer gas cell with a tunable microwave Fabry-Perot cavity. We report statistically limited sub-Hz precision of (0.08±0.72) Hz, observed between enantiopure samples of (R)-1,2-propanediol and (S)-1,2-propanediol at frequencies near 15 GHz. We confirm highly repeatable spectroscopic measurements compared to traditional pulsed-jet methods, opening up new capabilities in probing subtle molecular structural effects at the 10−10 level and providing a platform for exploring sources of systematic error in parity-violation searches. We discuss dominant systematic effects at this level and propose possible extensions of the technique for higher precision.

Disentangling the complex network of non-covalent interactions in fenchone hydrates via rotational spectroscopy and quantum chemistry

2021 ◽  
Author(s):  
Mhamad Chrayteh ◽  
Ecaterina Burevschi ◽  
Donatella Loru ◽  
Therese R. Huet ◽  
Pascal Dréan ◽  
...  
Keyword(s):  
Quantum Chemistry ◽  
Computational Chemistry ◽  
Complex Network ◽  
Microwave Spectroscopy ◽  
Rotational Spectroscopy ◽  
Non Covalent Interactions ◽  
First Time ◽  
Covalent Interactions

The hydrates of the monoterpenoid fenchone (C10H16O).(H2O)n (n=1,2,3) were investigated both by computational chemistry and microwave spectroscopy. Two monohydrates, three dihydrates and for the first time three trihydrates have been...

Aging study on a micro-fabricated Cs buffer-gas cell for atomic clock applications

2014 ◽  
Author(s):  
S. Abdullah ◽  
C. Affolderbach ◽  
F. Gruet ◽  
G. Mileti ◽  
Y. Petremand
Keyword(s):  
Atomic Clock ◽  
Buffer Gas ◽  
Gas Cell ◽  
Aging Study

scholarly journals DISTORTIONLESS SIGNALS TRANSFER THROUGH A WIRE MEDIA METASTRUCTURE

2018 ◽  
Vol 8 (1) ◽  
pp. 44-47 ◽  
Author(s):  
Dmytro Vovchuk ◽  
Serhii Haliuk ◽  
Leonid Politanskyy
Keyword(s):  
Electromagnetic Waves ◽  
Spectral Characteristics ◽  
Wide Frequency Range ◽  
Power Transfer ◽  
Fabry Perot ◽  
Signal Distortions ◽  
Metallic Wires ◽  
The Wire ◽  
Wire Media ◽  
First Time

In the paper the development of the components of communication means is considered based on the wire metastructures. This approach is novel and quite promising due to the metamaterials provides new opportunities for the radio engineering devices such as antennas, absorbers etc. First of all it makes possible decreasing of the dimensions of devices while the characteristics stay the same or better. Here the artificially created metastructure that consists of parallel metallic wires and characterizes by a negative electric permittivity was investigated. The possibility of broadband power transfer of electromagnetic waves was demonstrated. Also, at first time, the investigation of possible signal distortions due to wave propagation through the wire medium (WM) slab was performed via analyzing of spectral characteristics. The obtained results allow applying of WM to power transfer in wide frequency range (not only at frequencies of Fabry-Perot resonant) and enhancement of weak source propagation as well as to antennas constructions due to the absence of signal distortions. One of the promising applications of such structures is the possibility of realizing of flexible screens with nanometer thickness and high resolution.

scholarly journals Elucidating the multiple structures of pipecolic acid by rotational spectroscopy

2019 ◽  
Vol 21 (8) ◽  
pp. 4155-4161 ◽  
Author(s):  
A. Simão ◽  
C. Cabezas ◽  
I. León ◽  
E. R. Alonso ◽  
S. Mata ◽  
...  
Keyword(s):  
Amino Acid ◽  
Gas Phase ◽  
Theoretical Data ◽  
Pipecolic Acid ◽  
Conformational Space ◽  
Rotational Spectroscopy ◽  
Multiple Structures ◽  
First Time

The complex conformational space of the non-proteinogenic cyclic amino acid pipecolic acid has been explored in the gas phase for the first time, with 9 conformers characterized via a combination of CP-FTMW and LA-FTMW techniques, supported by theoretical data.

scholarly journals High quality electromagnetically induced transparency spectroscopy of 87 Rb in a buffer gas cell with a magnetic field

2017 ◽  
Vol 26 (7) ◽  
pp. 074204 ◽  
Author(s):  
Hong Cheng ◽  
Han-Mu Wang ◽  
Shan-Shan Zhang ◽  
Pei-Pei Xin ◽  
Jun Luo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electromagnetically Induced Transparency ◽  
Buffer Gas ◽  
Gas Cell ◽  
High Quality ◽  
Induced Transparency
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