High-accuracy calculations in the H+2 molecular ion: towards a measurement of mp/me

2007 ◽  
Vol 85 (5) ◽  
pp. 497-507 ◽  
Author(s):  
J Ph. Karr ◽  
F Bielsa ◽  
T Valenzuela ◽  
A Douillet ◽  
L Hilico ◽  
...  
Keyword(s):  
Vibrational Spectroscopy ◽  
Quantum Cascade Laser ◽  
Energy Levels ◽  
High Accuracy ◽  
Electron Mass ◽  
Mass Ratio ◽  
Molecular Ion ◽  
Quantum Cascade ◽  
Two Photon

We report on our recent advances in the calculation of the energy levels of the H+2 molecular ion, including relativistic and radiative corrections. These theoretical efforts are linked to the prospect of obtaining a new determination of the proton to electron mass ratio mp/me through precise vibrational spectroscopy of H+2. We describe the setup of our experiment, aiming at a measurement of the L = 2, υ = 0 → L = 2, υ = 1 two-photon transition at 9.166 μm using a phase-locked quantum cascade laser as excitation source.PACS Nos.: 31.15.Pf, 31.30.Jv, 32.10.Hq

Direct Determination of Transparency Current in Mid-Infrared Quantum Cascade Laser

2012 ◽  
Author(s):  
D. G. Revin ◽  
R. S. Hassan ◽  
A. B. Krysa ◽  
K. Kennedy ◽  
A. N. Atkins ◽  
...  
Keyword(s):  
Quantum Cascade Laser ◽  
Direct Determination ◽  
Mid Infrared ◽  
Quantum Cascade

scholarly journals The Uehling correction to the energy levels in a pionic atom

2006 ◽  
Vol 84 (2) ◽  
pp. 107-113 ◽  
Author(s):  
S G Karshenboim ◽  
E Yu. Korzinin ◽  
V G Ivanov
Keyword(s):  
Free Electron ◽  
Vacuum Polarization ◽  
Energy Levels ◽  
Analytic Form ◽  
Electron Mass ◽  
Mass Ratio ◽  
Pionic Atom ◽  
Closed Analytic Form

We consider a correction to energy levels in a pionic atom induced by the Uehling potential, i.e., by a free electron vacuum-polarization loop. The calculation is performed for circular states (l = n–1). The result is obtained in a closed analytic form as a function of Zα and the pion-to-electron mass ratio. Certain asymptotics of the result are also presented.PACS Nos.: 12.20.Ds, 36.10.Gv

Tunable external cavity quantum cascade laser for the simultaneous determination of glucose and lactate in aqueous phase

The Analyst ◽  
2010 ◽  
Vol 135 (12) ◽  
pp. 3260 ◽  
Author(s):  
Markus Brandstetter ◽  
Andreas Genner ◽  
Kresimir Anic ◽  
Bernhard Lendl
Keyword(s):  
Simultaneous Determination ◽  
Aqueous Phase ◽  
Quantum Cascade Laser ◽  
External Cavity ◽  
Quantum Cascade

Determination of the CO3− bond strength via the resonant two-photon photodissociation threshold: Electronic and vibrational spectroscopy of CO3−∙Arn

2006 ◽  
Vol 124 (17) ◽  
pp. 174302 ◽  
Author(s):  
Joseph C. Bopp ◽  
Eric G. Diken ◽  
Jeffrey M. Headrick ◽  
Joseph R. Roscioli ◽  
Mark A. Johnson ◽  
...  
Keyword(s):  
Bond Strength ◽  
Vibrational Spectroscopy ◽  
Two Photon

scholarly journals Two-Photon Vibrational Transitions in O2+ as Probes of Variation of the Proton-to-Electron Mass Ratio

2018 ◽  
Author(s):  
Ryan Carollo ◽  
Alexander Frenett ◽  
David Hanneke
Keyword(s):  
Dipole Moments ◽  
Excited Electronic State ◽  
Electron Mass ◽  
Mass Ratio ◽  
Transition Dipole ◽  
Two Photon ◽  
Statistical Precision ◽  
Systematic Effects ◽  
Multiple Routes ◽  
Vibrational Transitions

Vibrational overtones in deeply bound molecules are sensitive probes for variation of the proton-to-electron mass ratio μ. In nonpolar molecules, these overtones may be driven as two-photon transitions. Here, we present procedures for experiments with O2+, including state-preparation through photoionization, a two-photon probe, and detection. We calculate transition dipole moments between all X2Пg vibrational levels and those of the A2Пu excited electronic state. Using these dipole moments, we calculate two-photon transition rates and AC-Stark-shift systematics for the overtones. We estimate other systematic effects and statistical precision. Two-photon vibrational transitions in O2+ provide multiple routes to improved searches for μ variation.

scholarly journals Prospects for a polar-molecular-ion optical probe of varying proton-electron mass ratio

2018 ◽  
Vol 98 (5) ◽  
Author(s):  
Mark G. Kokish ◽  
Patrick R. Stollenwerk ◽  
Masatoshi Kajita ◽  
Brian C. Odom
Keyword(s):  
Optical Probe ◽  
Electron Mass ◽  
Mass Ratio ◽  
Molecular Ion
Sign in / Sign up

Export Citation Format

Share Document