Muonium is an exotic atom made up of an antimuon and an electron, which was discovered in 1960 and is given the chemical symbol Mu. During the muon's 7000220000000000000♠2.2 µs lifetime, muonium can enter into compounds such as muonium chloride (MuCl) or sodium muonide (NaMu). Due to the mass difference between the antimuon and the electron, muonium (μ+e−) is more similar to atomic hydrogen (p+e−) than positronium (e+e−). Its Bohr radius and ionization energy are within 0.5% of hydrogen, deuterium, and tritium.
Although muonium is short-lived, physical chemists study it using muon spin spectroscopy (μSR), a magnetic resonance technique analogous to nuclear magnetic resonance (NMR) or electron spin resonance (ESR) spectroscopy. Like ESR, μSR is useful for the analysis of chemical transformations and the structure of compounds with novel or potentially valuable electronic properties. Muonium is usually studied by muon spin rotation, in which the Mu atom's spin precesses in a magnetic field applied transverse to the muon spin direction (since muons are typically produced in a spin-polarized state from the decay of pions), and by avoided level crossing (ALC), which is also called level crossing resonance (LCR). The latter employs a magnetic field applied longitudinally to the polarization direction, and monitors the relaxation of muon spins caused by "flip/flop" transitions with other magnetic nuclei.
The morning slumbers not for me
The sun has gone letting me down
I wake in wonder I can see
The rain has come turning me round
The morning slumbers not for me
The sun has gone letting me down
I wake in wonder I can see
The rain has come turning me round
But it's alright now
Yes it's alright now
Cause it's all come together
In the last few days it's been better
All come together right now
The seven wonders of the world
Were broken and ready to fall
The king lay dying all alone
In sadness I'll always recall
But it's alright now
Yes it's alright now
Cause it's all come together
In the last few days it's been better
All come together right now
I had to feel good feeling good is all I need
You have to start with sad so good means what it means
And there's been lots of sad for me for me
But it's alright now
Yes it's alright now
Cause it's all come together
In the last few days it's been better
All come together right now
I think I've tumbled now at last
I guess there ain't nothing to choose
A fallen angel follows me
It looks like there's no time to lose
But it's alright now
Yes it's alright now
Cause it's all come together
In the last few days it's been better
All come together right now
Breathing in the air feel the falling rain