Fisika Inti dan Radioaktivitas
275
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P
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5. Reaksi Fusi
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;B?KC
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:?B7AKA7D A7H;D7 C;C;HBKA7D IKK I;A?J7H 7:7 IKK J;HI;8KJ
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:7B7C C;:7D C7=D;J?A :?H7D97D= EB; ,KI?7 N7D= :?I;8KJ :;D=7D C;:7D C7=D;J?A 8;H8;DJKA AK; :ED7J JEHKI
Gambar 10.21
Penggabungan empat inti hidrogen membentuk inti helium disertai
pelepasan energi.
H
1 1
H
1 1
H
1 1
H
1 1
H
1 1
H
1 1
H
1 1
H
2 1
H
2 1
Hc
3 2
Hc
3 2
Hc
4 2
H
1 1
H–2 deuterium
H–3 tritium
reaksi fusi helium
neutron +
+ +
+ +
+
Gambar 10.22
Reaksi fusi di Matahari
Gambar 10.23
Tokamak ruang vakum
toroid arus listrik
luar medan
magnetik total
plasma arus
plasma medan
magnetik poloid
medan magnetik
toroid
Sumber: Physics for Scientist and Engineers, 2000
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Mudah dan Aktif Belajar Fisika untuk Kelas XII
276
Contoh
10.9
?JKD=B7;D;H=?:7B7C;0N7D=:?8;87IA7DEB;F;D==78KD=7D:K7FHEJED:7D :K7D;KJHEDKDJKAC;C8;DJKAI;8K7?DJ?;B?KC ?A;J7K?C7II7
IC7 ;
IC7
D IC7:7DIC7;0 =
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5
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;0
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P
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;0
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-?
N7D= C7II7DN78;HJKHKJJKHKJ7:7B7
IC7
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H;7AI?DN7 7II7 ? IC7:7DC7II7:;KJHED
IC7 ;H7J?A7DH;7AI??DJ?8;H?AKJ
? +
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? IC7 IC7
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7 7=7?C7D7 H;7AI? ?I? :7F7J :?A;D:7B?A7D
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F7 N7D= C;DN;878A7D A;HKI7A7D KDJKA C;D=7:7A7DIK7JKH;7AI?KI?
9 F7N7D=:?C7AIK::;D=7DH7:?7I?:7D87=7?C7D7
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Tes Kompetensi Subbab
C
+80142.6;1;2:.4
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Fisika Inti dan Radioaktivitas
277
D. Reaktor Nuklir, Bom Nuklir, dan Radioisotop
