A direct determination of the proton-electron mass ratio

TITAN (TRIUMF's Ion Traps for Atomic and Nuclear science) is an online facility designed to carry out high-precision mass measurements on singly and highly charged radioactive ions. The TITAN Penning trap has been built and optimized in order to perform such measurements with an accuracy in the sub ppb-range. A detailed characterization of the TITAN Penning trap is presented and a new compensation method is derived and demonstrated, verifying the performance in the range of sub-ppb.

show abstract

“…The basic principal behind Penning-trap mass spectrometry [34] consists of measuring the cyclotron frequency…”

Section: Tof-icr Penning Trap Mass Measurements Basicsmentioning

confidence: 99%

Verifying the accuracy of the TITAN Penning-trap mass spectrometer

Brodeur

Ryjkov

Brunner

et al. 2012

International Journal of Mass Spectrometry

View full text Add to dashboard Cite

show abstract

“…Figure 1 shows the precision of m p /m e measured directly over the past 40 years. In earlier times, m p /m e was determined by measuring the cyclotron frequencies of a free proton and a free electron in the same magnetic field, [9][10][11][12][13][14][15][16] where the energy scales involved were in the high energy range of GeV to TeV. In the last decade, due to rapid development of new techniques, such as femtosecond optical comb and laser cooling and trapping, atomic and molecular spectroscopy can be measured to an unprecedented high precision at the level of Hz or sub-Hz, which has created many opportunities to test physical laws in low energy eV region.…”

mentioning

confidence: 99%

High-precision spectroscopy of hydrogen molecular ions

et al. 2015

View full text Add to dashboard Cite

In this paper, we overview recent advances in high-precision structure calculations of the hydrogen molecular ions ( and HD+), including nonrelativistic energy eigenvalues and relativistic and quantum electrodynamic corrections. In combination with high-precision measurements, it is feasible to precisely determine a molecular-based value of the proton-to-electron mass ratio. An experimental scheme is presented for measuring the rovibrational transition frequency (v,L) : (0,0) → (6,1) in HD+, which is currently underway at the Wuhan Institute of Physics and Mathematics.

show abstract

“…2, cyclotron resonance is detected by measuring ion loss from the trap after resonant excitation. In Ref.…”

mentioning

confidence: 99%

Laser-Fluorescence Mass Spectroscopy

1983

View full text Add to dashboard Cite

Measurements of ion cyclotron-resonance frequencies in a Penning trap, by a laser fluorescence technique, are described. This technique has been applied to indirect measurements of the proton-to-electron mass ratio and the 9 Be + electron gj factor. It is found that m p /m e = 1836.152 38(62) (0.34 ppm) and #>( 9 Be + ) = 2.002 262 06(42) (0.21 ppm). Ultimately, ion cyclotron-resonance accuracies near 1 part in 10 13 should be possible. > [An irreducible lower"]

show abstract

A direct determination of the proton-electron mass ratio

Cited by 26 publications

References 10 publications

Verifying the accuracy of the TITAN Penning-trap mass spectrometer

Verifying the accuracy of the TITAN Penning-trap mass spectrometer

High-precision spectroscopy of hydrogen molecular ions

Laser-Fluorescence Mass Spectroscopy

Contact Info

Product

Resources

About