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Introduction to Health Physics: Fourth Edition - Ruang Baca FMIPA UB

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856 Answers <strong>to</strong> Problems<br />

3.27 8.198 × 10 −14 J<br />

0.512 MeV<br />

0.042 ˚A<br />

3.28 1.47 × 10 −6 g<br />

3.29 1.545 ˚A<br />

3.30 2952 ˚A<br />

3.31 a. fe = 57.6 N<br />

b. fg =1.84 × 10 −34<br />

3.32 4.34 eV<br />

4.1 0.156 MeV<br />

4.2 1.3 MBq, 35.1 μCi<br />

4.3<br />

198 Au, % 131 I, %<br />

t(0) 65 35<br />

t(3) 52 48<br />

t(8) 32 68<br />

t(16) 11 89<br />

A(t) = 37e −0.26t +20e −0.086t<br />

4.4 b. 14.3 d<br />

c. 0.049 d −1<br />

d. A(t) = 5500e −0.049t<br />

e. 32 P<br />

4.5 289.3 mCi, 10.7 GBq<br />

4.6 4 × 10 4<br />

4.7 1.2 μg<br />

4.8 299 years<br />

4.9 a. 55 d<br />

b.5d<br />

c. 160 d<br />

d. 1200 d<br />

4.10 36%<br />

4.11 3.25 × 10 15<br />

4.12 9.96 × 10 5<br />

4.13 a. 598 d<br />

b. 86.6 d<br />

4.14 39 <strong>to</strong>nnes<br />

4.15 4.2 g<br />

4.16 U-4: 0.029 Ci/<strong>to</strong>n<br />

U-5: 0.00132 Ci/<strong>to</strong>n<br />

U-8: 0.029 Ci/<strong>to</strong>n<br />

4.17 U-4: 0.34 μCi<br />

U-5: 0.016 μCi<br />

U-8: 0.34 μCi<br />

4.18 1.3 ◦ C<br />

4.19 23 μCi/<strong>to</strong>nne<br />

4.20 6.28<br />

4.21 104 hours<br />

4.22 A(t) = 100e −0.087t + 10e −0.115t<br />

4.23 ∼ 7h<br />

4.24 2.6 μg<br />

4.25 0.27 g U-8<br />

0.26 g U-5<br />

0.58 g Th-232<br />

4.26 70 y, 1.1 × 10 14 Bq<br />

4.27 26 min.<br />

4.28 0.12 Bq<br />

4.29 5.2 × 10 16 Bq/m 3<br />

4.30 35 S 14 C<br />

a. 7.8 × 10−9 W/MBq<br />

b. 1.3 × 104 W/kg<br />

7.9 × 10 −9<br />

W/MBq<br />

1.3<br />

W/kg<br />

4.31 a. 1.8 × 10 −7 W/MBq<br />

b. 972 W/kg<br />

4.32 5.2 × 10 9 J<br />

4.33 a. 4.5 × 10 8 W/kg<br />

b. 4.5 × 10 8 W/kg<br />

4.34 6.4 × 10 −5 mL<br />

4.35 23.3 atm.<br />

4.36 a. 9.47 × 10 11 Bq<br />

b. 5.7 × 10 −3 MeV/t<br />

4.37 a. 136.5 h<br />

b. 0.035 μg<br />

4.38 a. 3 × 10 4 Ci<br />

b. Yes<br />

4.39 1.15 × 10 9 Bq<br />

4.40 7.1 × 10 16 Bq/year<br />

4.41 U-8/U-5 = 34.6<br />

4.42 a. U-4: 3.5 × 10 6 Bq<br />

U-5: 7.56 × 10 4 Bq<br />

U-8: 631 Bq<br />

b. 3.58 × 10 16 Bq<br />

4.43 a. 73 mCi<br />

b. 73 mCi<br />

c. 0.92 mg<br />

d1. 0<br />

d2. 4.6 × 10 3 Ci/g<br />

d3. 15.8 × μg<br />

4.44 a. 6.93 m<br />

b. 10 m<br />

4.45 b. 128.7 mrems/y<br />

4.46 a1. 7μ Ci/g<br />

a2. 2.6 × 10 5 Bq/g<br />

b. 2.9 × 10 −8 Ci<br />

4.47 a. 1.58 × 10 5 Ci/g<br />

b. 2.5 × 10 −17 g<br />

c. 1.3 × 10 −9 mole<br />

d. 0.041 mole<br />

e. 2.75 × 10 −18 %<br />

4.48 7.35 × 10 8 y<br />

4.49 a. 5.42 MBq<br />

b. 2.63 × 10 15 a<strong>to</strong>ms<br />

c. 4.36 × 10 −9 mole<br />

d. 0.107 μL<br />

4.50 7.2 dpm<br />

4.51 1.24 μg<br />

4.52 5.65 mL<br />

5.1 4.08 × 1023 5.2 Si: 2.65 × 1022 O: 5.3 × 1022 5.3 Al: 3.9 × 1023 elec/cm2 Fe: 3.8 × 1023 elec/cm2 32 5.4 P<br />

5.5 E = 1.17 MeV<br />

210Bi 5.6 0.083 cm<br />

5.7 a. 1.09 MeV<br />

b. 1.30 MeV<br />

5.8 a. 0.077 MeV<br />

b. 0.023 MeV<br />

5.9 a. 0.22 MeV<br />

b. 0.22 MeV<br />

5.10 0.48 MeV<br />

5.11 0.61 MeV<br />

5.12 a. 0.047 MeV<br />

b. 0.617 MeV<br />

c. 1.12 MeV<br />

5.13 a. 0.63 per cm<br />

0.056 cm2 /g<br />

19.2 barns<br />

b. 1.25 MeV<br />

5.14 a. beta and gamma<br />

b. ∼1 MeV<br />

c. 0.4 MeV<br />

d. 198Au e. 900e−24t + 100e−0.25t 5.15 41.3<br />

5.16 1:0.8:1.2<br />

5.17 a. 6.25 × 109 phot/cm2 /s<br />

b. 1.12 × 103 ergs/g/s<br />

0.112 J/kg/s<br />

5.18 a. HVL<br />

0.1MeV<br />

0.8 MeV<br />

<br />

<br />

Al 1.59 cm<br />

Cu 0.18 cm<br />

<br />

<br />

Al 3.75 cm<br />

Cu 1.12 cm

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