6.15. AN/N = 71e4 (0.7 - + 0.3 t) pdNA cot22 = 1.4.10-3,
4T2
Af i
Ai2
2
where Z1 and Z2 are the atomic numbers of copper and zinc,
M1 and M2 are their molar masses, NA is Avogadro's number.
6.16. Aa = n (Ze2/T)2 cot2 (0012) = 0.73 kb.
6.17. (a) 0.9 MeV; (b) dold52 = Aa/4n sin4 (0/2) = 0.64 kb/sp.
6.18. t = (3mc2/2e2co2) In ri = 15 ns.
6.19. t
m2c3r3I4e4
13 ps.
6.21. rn = linh/mo), En = nho), where n = 1, 2, . .
=
=-- 1
1/7/Tn.
6.22.
ri, pm
v, 106 m/s T, eV
Eb, eV
Ti, V,
(pi, V
R, nm
H
52.9
2.18
13.6
13.6
13.6
10.2
121.5
He
26.5
4.36
54.5
54.5
54.5
40.8
30.4
6.23. co = me4Z2/h3n8 = 2.07.1016 s--1 .
6.24. pm, = neh/2mc, µn /Mn = el2mc, t1 = 146.25. B = m2e7lch5 = 125 kG.
6.27. The Brackett series, X6-.4 = 2.63 Rm.
6.28. (a) 657, 487 and 434 nm; (b) 2s 16X,
1.5 -102.
6.29. For n >> 1 sin 0 x n3acl1R, whence 0
60°.
6.30. Het
6.31. N = 1/2n (n - 1).
6.32. 97.3, 102.6 and 121.6 nm.
6.33. n = 5.
6.34 ' R -
176nc
15Z20k - -= 2.07.10 16 s -1.
6.35. Z--- -V- (176/15)ncIRAA, = 3, Li".
6.36. X-- (2nc/Aco) (Z1/ R/A - 1 )1(2Z V RIAo)-1)------ 0.47 Rm.
6.37. Eb = 54.4 eV (He+).
6.38. E = E, 4hR = 79 eV.
6.39. v = V 2 (hco - 4hR)/m = 2.3.106 m/s, where co = 2acA.
6.40. Tmin = 3i2hR = 20.5 eV.
6.41. v = 3hR/4mc = 3.25 m/s, where m is the mass of the
atom.
6.42. (e - e')/e
3hRI8mc2 = 0.55-10-6%, where m is the
mass of the atom.
6.43. v = 2 y hRlm = 3.1-106 m/s, where 7n is the mass of
the electron.
6.44. v = 3RAX/8n cos 0 = 0.7.106 m/s.
6.45. (a) En = n2n2h2/2m12; (b) E n =
= nh 17. alm; (d) En = -ma2/23t2n2.
n2h2/2mr2;
(c) En =
351