interação feixe de elétrons-amostra [3]
interação feixe de elétrons-amostra [3] - DEM - Unesp
interação feixe de elétrons-amostra [3] - DEM - Unesp
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<strong>interação</strong> <strong>feixe</strong> <strong>de</strong> <strong>elétrons</strong>-<strong>amostra</strong><br />
‣ Comprimento <strong>de</strong> onda do <strong>feixe</strong> <strong>de</strong> <strong>elétrons</strong> (λ):<br />
V [kV]<br />
λ [pm]<br />
1<br />
38,7<br />
5<br />
17,3<br />
10<br />
12,2<br />
15<br />
9,9<br />
20<br />
8,6<br />
25<br />
30<br />
120<br />
200<br />
7,6<br />
6,9<br />
3,3<br />
2,5<br />
λ =<br />
λ =<br />
⎛<br />
⎜<br />
2 ⋅ e ⋅V<br />
⋅ m<br />
⎝<br />
1,5<br />
h<br />
e<br />
2<br />
+<br />
( )<br />
−6<br />
2<br />
V + 10 ⋅V<br />
e<br />
2<br />
c<br />
⋅V<br />
2<br />
2<br />
[nm]<br />
⎞<br />
⎟<br />
⎠<br />
c = 2,998.10 8 m.s -1<br />
e = 1,602.10 -19 C<br />
h = 6,62.10 -39 J.s<br />
m e = 9,109.10 -31 kg<br />
V = voltagem<br />
2>