id author title date pages extension mime words sentence flesch summary cache txt zw12z320540 James Martin Kelly Precision Measurements and Development of a Spectrometer to Determine Atomic Masses of High Impact for the Astrophysical r-Process 2019 .txt text/plain 390 14 38 Finally, a new experimental facility in development at Argonne National Laboratory will allow for Penning trap mass spectrometry on a swath of N=126 isotopes previously inaccessible, and of critical importance for understanding the r-process. Changes in two-neutron separation and neutron pairing energies show systematic deviations from theoretical mass model predictions. cache/zw12z320540.txt txt/zw12z320540.txt