Title :
Precision measurement of the atomic mass of /sup 6/Li using a Penning ion trap mass spectrometer
Author :
Heavner, T.P. ; Jefferts, S.R. ; Dunn, G.H.
Author_Institution :
Joint Inst. for Lab. Astrophys., Colorado Univ., Boulder, CO, USA
Abstract :
A cryogenic (4 K) Penning ion trap mass spectrometer has been used to measure the mass ratios of /sup 6/Li/sup +///sup 12/C/sup 2+/ and /sup 6/Li/sup +//D/sub 3//sup +/ using small numbers of ions (1-10). These measurements result in a value for the atomic mass of /sup 6/Li of 6.015122795(16) u, which has a fractional uncertainty of 2.7/spl times/10/sup -9/, representing a factor of 30 improvement over the published accepted value.
Keywords :
atomic mass; lithium; mass measurement; mass spectra; nuclear mass; nuclei with mass number 6 to 19; particle traps; trapped ions; /sup 6/Li/sup +///sup 12/C/sup 2+/; /sup 6/Li/sup +//D/sub 3//sup +/; Li; Penning ion trap mass spectrometer; atomic mass of /sup 6/Li; cryogenic mass spectrometer; fractional uncertainty; fundamental metrology; mass ratios; precision measurement; small numbers of ions; Atomic measurements; Cryogenics; Cyclotrons; Electron traps; Frequency; Helium; Magnetic field measurement; Mass spectroscopy; Motion detection; Superconducting magnets;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.699804
