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Isotop silikon

Isotop utama silikon
Iso­top Peluruhan
kelim­pahan waktu paruh (t1/2) mode pro­duk
28Si 92,2% stabil
29Si 4,7% stabil
30Si 3,1% stabil
31Si renik 2,62 jam β 31P
32Si renik 153 thn β 32P
Berat atom standar Ar°(Si)
  • [28,08428,086]
  • 28,085±0,001 (diringkas)[1]

Silikon (14Si) memiliki 23 isotop yang diketahui, dengan nomor massa berkisar antara 22 hingga 44. 28Si (isotop yang paling melimpah, pada 92,23%), 29Si (4,67%), dan 30Si (3,1%) adalah isotop stabil. Radioisotop yang berumur paling panjang adalah 32Si, yang dihasilkan oleh spalasi sinar kosmik argon. Waktu paruhnya telah ditentukan menjadi sekitar 150 tahun (dengan energi peluruhan 0,21 MeV), dan ia meluruh melalui emisi beta menjadi 32P (yang memiliki waktu paruh 14,28 hari)[2] dan kemudian menjadi 32S. Setelah 32Si, 31Si memiliki waktu paruh terpanjang kedua pada 157,3 menit. Semua radioisotop lain memiliki waktu paruh di bawah 7 detik.

Daftar isotop

Nuklida[3]
[n 1]
Z N Massa isotop (Da)[4]
[n 2][n 3]
Waktu paruh
[n 4]
Mode
peluruhan

[n 5]
Isotop
anak

[n 6]
Spin dan
paritas
[n 7][n 4]
Kelimpahan alami (fraksi mol)
Energi eksitasi Proporsi normal Rentang variasi
22Si 14 8 22,03579(54)# 29(2) mdtk β+ (67,6%) 22Al 0+
β+, p (32,4%) 21Mg
23Si 14 9 23,02544(54)# 42,3(4) mdtk β+ (12%) 23Al 3/2+#
β+, p (88%) 21Mg
24Si 14 10 24,011535(21) 140(8) mdtk β+ (62,4%) 24Al 0+
β+, p (37,6%) 23Mg
25Si 14 11 25,004109(11) 220(3) mdtk β+ (64,8%) 25Al 5/2+
β+, p (35,2%) 24Mg
26Si 14 12 25,9923338(12) 2,2453(7) dtk β+ 26Al 0+
27Si 14 13 26,98670469(12) 4,15(4) dtk β+ 27Al 5/2+
28Si 14 14 27,9769265350(5) Stabil 0+ 0,92223(19) 0,92205–0,92241
29Si 14 15 28,9764946653(6) Stabil 1/2+ 0,04685(8) 0,04678–0,04692
30Si 14 16 29,973770137(23) Stabil 0+ 0,03092(11) 0,03082–0,03102
31Si 14 17 30,97536319(5) 157.36(26) mnt β 31P 3/2+
32Si 14 18 31,9741515(3) 153(19) thn β 32P 0+ renik kosmogenik
33Si 14 19 32,9779770(8) 6,18(18) dtk β 33P (3/2+)
34Si 14 20 33,978575(15) 2,77(20) dtk β 34P 0+
34mSi 4256,1(4) keV <210 ndtk IT 34Si (3−)
35Si 14 21 34,98455(4) 780(120) mdtk β (94,74%) 35P 7/2−#
36Si 14 22 35,98665(8) 450(60) mdtk β (87,5%) 36P 0+
β, n (12,5%) 35P
37Si 14 23 36,99295(12) 90(60) mdtk β (83%) 37P (7/2−)#
β, n (17%) 36P
38Si 14 24 37,99552(11) 90# mdtk [>1 μdtk] β, n 37P 0+
β 38P
39Si 14 25 39,00249(15) 47,5(20) mdtk β 39P 7/2−#
40Si 14 26 40,00583(37) 33,0(10) mdtk β 40P 0+
41Si 14 27 41,01301(60) 20,0(25) mdtk β 41P 7/2−#
42Si 14 28 42,01768(54)# 12,5(35) mdtk β 42P 0+
43Si 14 29 43,02480(64)# 15# mdtk [>260 ndtk] 3/2−#
44Si 14 30 44,03061(64)# 10# dtk 0+
Header & footer tabel ini:  view 
  1. ^ mSi – Isomer nuklir tereksitasi.
  2. ^ ( ) – Ketidakpastian (1σ) diberikan dalam bentuk ringkas dalam tanda kurung setelah digit terakhir yang sesuai.
  3. ^ # – Massa atom bertanda #: nilai dan ketidakpastian yang diperoleh bukan dari data eksperimen murni, tetapi setidaknya sebagian dari tren dari Permukaan Massa (trends from the Mass Surface, TMS).
  4. ^ a b # – Nilai yang ditandai # tidak murni berasal dari data eksperimen, tetapi setidaknya sebagian dari tren nuklida tetangga (trends of neighboring nuclides, TNN).
  5. ^ Mode peluruhan:
    IT: Transisi isomerik
    n: Emisi neutron
    p: Emisi proton
  6. ^ Simbol tebal sebagai anak – Produk anak stabil.
  7. ^ ( ) nilai spin – Menunjukkan spin dengan argumen penempatan yang lemah.

Referensi

  1. ^ Meija, J.; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure Appl. Chem. 88 (3): 265–91. doi:10.1515/pac-2015-0305. 
  2. ^ Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S. (2017). "The NUBASE2016 evaluation of nuclear properties" (PDF). Chinese Physics C. 41 (3): 030001. Bibcode:2017ChPhC..41c0001A. doi:10.1088/1674-1137/41/3/030001. 
  3. ^ Waktu paruh, mode peluruhan, spin nuklir, dan komposisi isotop bersumber dari:
    Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S. (2017). "The NUBASE2016 evaluation of nuclear properties" (PDF). Chinese Physics C. 41 (3): 030001. Bibcode:2017ChPhC..41c0001A. doi:10.1088/1674-1137/41/3/030001. 
  4. ^ Wang, M.; Audi, G.; Kondev, F. G.; Huang, W. J.; Naimi, S.; Xu, X. (2017). "The AME2016 atomic mass evaluation (II). Tables, graphs, and references" (PDF). Chinese Physics C. 41 (3): 030003–1—030003–442. doi:10.1088/1674-1137/41/3/030003. 

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