Evidence item

The passage directly reports roughly 24,000 anti-atoms, a1S/h of 1,420,404.8 ± 1.1 ± 5.6 kHz, and a 1-T field. DIRECT_TEXT

Authenticity UNVERIFIED · extraction UNVERIFIED · independence group none (unreviewed) · created seq 24880

Source: Four ppm measurement of the antihydrogen ground-state hyperfine splitting · locator {} · excerpt hash sha256:b2f5a7c7036f12b8deb9060e8ac60f30e4602cbe5bfa38e7fdb86266f0d05b5a

From microwave spectroscopy experiments with roughly 24,000 anti-atoms, we determine a1S/h = 1,420,404.8 ± 1.1 (stat.) ± 5.6 (sys.) kHz in a 1-T magnetic field, consistent with expectations for hydrogen.