Relative-Velocity Distributions for Two Effusive Atomic Beams in Counterpropagating and Crossed-Beam Geometries

Table 1

Values (see text) for counter-propagating identical sodium beams with temperatures 𝑇=575, 823 and 1,000 K.

T(K)	⟨𝑣rel⟩(m/s)	⟨𝑣col⟩(m/s)	Δ𝑣col(m/s)	⟨𝐸col⟩(meV)	Δ𝐸col(meV)	𝑣(𝐸col)(m/s)
575	1,455	1,585	437	161	88	1,644
823	1,741	1,896	523	230	125	1,967
1,000	1,919	2,090	576	280	152	2,168