Mass Spectrometry at 100 Parts Per Trillion
- 203 Downloads
Using a Penning trap single ion mass spectrometer, we have measured the atomic masses of 13 isotopes, many important for fundamental metrology and fundamental constants [9, 16, 3]. The fractional accuracy of the measurements, ≈ 10−10, is typically two orders of magnitude better than previously accepted values. This paper provides an overview of the MIT Penning trap measurements with special emphasis on the new techniques which we have developed for making measurements with accuracy 10−10. We go on to discuss some current work and proposals for improving the accuracy by another order of magnitude. We conclude with a discussion of the scientific payoff already realized, and the future scientific applications of precision mass spectrometry.
KeywordsCyclotron Frequency Johnson Noise Gravity Gradiometer Trapping Voltage Cyclotron Mode
Unable to display preview. Download preview PDF.
- 1.Bevington, P. and Robinson, D. (1992) Data Reduction and Error Analysis for the Physical Sciences, 2nd edition, McGraw-Hill, Boston.Google Scholar
- 18.Van Dyck RS, J., F. DL, Z. SL, and S. PB (1998) High precision Penning trap mass spectroscopy and a new measurement of the protonŠs atomic mass, in Trapped Charged Particles and Fundamental Physics., Vol. 457, Asilomar, CA, pp. 101–110, AIP.Google Scholar