1.
Phys Rev Lett
; 131(9): 093201, 2023 Sep 01.
Artigo
em Inglês
| MEDLINE
| ID: mdl-37721828
RESUMO
Light-ion trap (LIONTRAP), a high-precision Penning-trap mass spectrometer, was used to determine the atomic mass of ^{4}He. Here, we report a 12 parts-per-trillion measurement of the mass of a ^{4}He^{2+} ion, m(^{4}He^{2+})=4.001 506 179 651(48) u. From this, the atomic mass of the neutral atom can be determined without loss of precision: m(^{4}He)=4.002 603 254 653(48) u. This result is slightly more precise than the current CODATA18 literature value but deviates by 6.6 standard deviations.
2.
Vopr Kurortol Fizioter Lech Fiz Kult
; (2): 19-21, 1981.
Artigo
em Russo
| MEDLINE
| ID: mdl-6453464
3.
Vopr Kurortol Fizioter Lech Fiz Kult
; 36(4): 350-3, 1971.
Artigo
em Russo
| MEDLINE
| ID: mdl-5152961