Publication

Investigation of the fine structure of Antihydrogen

On February 19, 2020, ALPHA published the first investigation of the fine structure of Antihydrogen.

News Article
19 Feb 2020

Lyman-Alpha Transition observed in Antihydrogen

The ALPHA collaboration has for the first time observed single-photon excitation of antihydrogen atoms from the ground (1S) state to the 2P state using 121nm pulsed laser light - the so-called lyman-alpha line of the Lyman series.

News Article
23 Aug 2018

First 1S-2S Line Shape published in Nature

Our latest breakthrough, the first detailed study of one of the hyperfine components of the 1S-2S line in trapped antihydrogen has been published in Nature and is the most precise and most accurate measurement of antimatter to date.

News Article
04 Apr 2018

Observation of the 1S-2S Transition in Trapped Antihydrogen published in Nature

Our latest breakthrough, the first observation of the 1S-2S transition in trapped antihydrogen has been published in Nature and is the first time a spectral line has been observed in antihydrogen.

News Article
16 Dec 2016

ALPHA probes Antimatter Gravity

Physicists have long wondered if the gravitational interaction between antimatter and matter might be different than that between matter and itself. Do atoms made of antimatter, like antihydrogen, fall at a different rate to those made of matter, or might they even fall up – antigravity?

News Article
30 Apr 2013

A new result from ALPHA - The first measurements of the Antihydrogen Spectrum

Once you've trapped antihydrogen what do you do? You measure it!
We report the first resonant quantum transitions in antihydrogen atoms.

News Article
07 Mar 2012

Antihydrogen Atoms trapped for 1000s

In a paper published online at Nature Physics, ALPHA announces confinement of antihydrogen atoms for at least 1000s.

News Article
04 Jun 2011