Table 2 Annihilation detector efficiencies and background rates

From: Characterization of the 1S–2S transition in antihydrogen

 

Efficiency

Uncertainty

Background rate (10−3 s−1)

Uncertainty (10−3 s−1)

Laser exposure (300 s)

0.472

0.001

1.04

0.11

Microwave exposure (32 s)

0.801

0.002

33.0

0.6

Release of surviving atoms (1.6 s)

0.852

0.002

191

1

  1. The detection efficiencies and background rates of the silicon vertex detector, as determined by the multivariate analysis (Methods), are listed for the three observation windows. The 1.6-s window during which the surviving atoms are released extends for 0.1 s after the magnet rampdown is complete.
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