Single-reference high-precision mass measurement with a multi-reflection time-of-flight mass spectrograph

摘要

A multi-reflection time-of-flight mass spectrograph, competitive with Penningtrap mass spectrometers, has been built at RIKEN. We have performed a firstonline mass measurement, using 8Li+ (T1/2 = 838 ms). A new analysis method hasbeen realized, with which, using only 12C+ references, the mass excess of 8Liwas accurately determined to be 20947.6(15)(34) keV (dm/m = 6.6 x 10-7). Thespeed, precision and accuracy of this first online measurement exemplifies thepotential for using this new type of mass spectrograph for precisionmeasurements of short-lived nuclei.