Physics & Astronomy
spectroscopy
100%
photons
99%
helium
94%
superfluidity
89%
multiphoton absorption
80%
Rydberg series
78%
free jets
73%
field strength
73%
lasers
73%
coherent radiation
72%
atomic beams
71%
beam splitters
65%
magnetic resonance
65%
ultraviolet lasers
63%
dye lasers
62%
interactions
61%
blurring
59%
high power lasers
57%
rare gases
56%
wave functions
46%
laser beams
43%
probes
43%
atoms
42%
ionization
42%
harmonics
41%
ground state
39%
molecules
38%
shift
36%
output
35%
energy
35%
excitation
34%
pumps
34%
spin resonance
31%
high resolution
29%
sensitivity
28%
closing
27%
elementary excitations
27%
nuclear spin
24%
proposals
22%
infrared spectroscopy
21%
angular momentum
19%
dissipation
19%
nuclear magnetic resonance
19%
synthesis
17%
life (durability)
16%
microwaves
16%
liquids
12%
magnetic fields
11%
electrons
10%