Year: 2023
Type: article
Abstract: Light-ion trap (LIONTRAP), a high-precision Penning-trap mass spectrometer, was used to determine the atomic mass of $^{4}\mathrm{He}$. Here, we report a 12 parts-per-trillion measurement of the mass of a $^{4}{\mathrm{He}}^{2+}$ ion, $m(^{4}{\mathrm{He}}^{2+})=4.001\text{ }506\text{ }179\text{ }651(48)\text{ }\text{ }\mathrm{u}$. From this, the atomic mass of the neutral atom can be determined without loss of precision: $m(^{4}\mathrm{He})=4.002\text{ }603\text{ }254\text{ }653(48)\text{ }\text{ }\mathrm{u}$. This result is slightly more precise than the current CODATA18 literature value but deviates by 6.6 standard deviations.
Source: Physical Review Letters
Language: English
Subfield: Statistics, Probability and Uncertainty
Field: Decision Sciences
Domain: Social Sciences
Open Access status: hybrid
Estimated APC paid: $3,750
Funders: International Max Planck Research School for Environmental, Cellular and Molecular Microbiology, Universität Heidelberg, Max-Planck-Gesellschaft, International Max Planck Research School for Advanced Methods in Process and Systems Engineering, RIKEN, GSI Helmholtzzentrum für Schwerionenforschung, International Max Planck Research School for Precision Tests of Fundamental Symmetries
OpenAlex ID: W4386285170