31

August 30, '49

Block pointed out that, if γT₂ = T₁γ² = [const] as
would be the case for termal broadening of the Sn isotopes,
that our isotope identification would be backwards,
since it turns out that

dv/dΔω h_max = -γ²([const.])T₂²

[Now it] T₂ = 1/γΔH and ΔH = kH, then T₂ = 1/γkH = 1/kΔω
& since we compare at [const.] freq, T₂ = [const] [therefore] our
γ² correction is correct on opposite page.

Test
Sample #5
A (5075 [right arrow] 5050)

Width	Dist. Marker Res. Dist. (Markers)
3.0 mm	111.8 mm 20.5 mm
3.1
3.2
2.7	ν = 5070.5 KC
3.4
3.0	rate = 25/111.8 = 0.222 KC/mm
3.1

Av. = 3.07 ± 0.21
= 3.07 (1 ± 0.07) mm