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Isotop berkelium

Ensiklopedia Pengetahuan Universitas Islam Sultan Agung

Berkelium (97Bk) adalah sebuah unsur buatan, sehingga berat atom standarnya tidak dapat diberikan. Seperti semua unsur buatan, ia tidak memiliki satu pun isotop stabil. Isotop pertama yang disintesis adalah 243Bk pada tahun 1949. Ada 18 radioisotop yang diketahui, mulai dari 233Bk hingga 253Bk (dengan pengecualian 235Bk, 237Bk, dan 239Bk), dan 6 isomer nuklir. Isotop yang berumur paling panjang adalah 247Bk dengan waktu paruh 1.380 tahun.

Daftar isotop

|- | 233Bk[1] | style="text-align:right" | 97 | style="text-align:right" | 136 | | 21 dtk | α | 229Am | |- | rowspan=2|234Bk[2] | rowspan=2 style="text-align:right" | 97 | rowspan=2 style="text-align:right" | 137 | rowspan=2| | rowspan=2|19(+6-4) dtk | α (50%) | 230Am | rowspan=2| |- | β+ (50%) | 234Cm |- | rowspan=2|236Bk | rowspan=2 style="text-align:right" | 97 | rowspan=2 style="text-align:right" | 139 | rowspan=2|236,05733(43)# | rowspan=2|22(+13-6) dtk[3] | α | 232Am | rowspan=2| |- | β+ | 236Cm

|- | rowspan=3|238Bk | rowspan=3 style="text-align:right" | 97 | rowspan=3 style="text-align:right" | 141 | rowspan=3|238,05828(31)# | rowspan=3|2,40(8) mnt | α | 234Am | rowspan=3| |- | β+, SF (0,048%) | (beberapa) |- | β+ (langka) | 238Cm

|- | rowspan=3|240Bk | rowspan=3 style="text-align:right" | 97 | rowspan=3 style="text-align:right" | 143 | rowspan=3|240,05976(16)# | rowspan=3|4,8(8) mnt | β+ (90%) | 240Cm | rowspan=3| |- | α (10%) | 236Am |- | β+, SF (0,002%) | (beberapa) |- | rowspan=2|241Bk | rowspan=2 style="text-align:right" | 97 | rowspan=2 style="text-align:right" | 144 | rowspan=2|241,06023(22)# | rowspan=2|4,6(4) mnt | α | 237Am | rowspan=2|(7/2+) |- | β+ (langka) | 241Cm |- | rowspan=2|242Bk | rowspan=2 style="text-align:right" | 97 | rowspan=2 style="text-align:right" | 145 | rowspan=2|242,06198(22)# | rowspan=2|7,0(13) mnt | β+ (99,99%) | 242Cm | rowspan=2|2−# |- | β+, SF (3%) | (beberapa) |- | style="text-indent:1em" | 242mBk | colspan="3" style="text-indent:2em" | 200(200)# keV | 600(100) ndtk | SF | (beberapa) | |- | rowspan=2|243Bk | rowspan=2 style="text-align:right" | 97 | rowspan=2 style="text-align:right" | 146 | rowspan=2|243,063008(5) | rowspan=2|4,5(2) jam | β+ (99,85%) | 243Cm | rowspan=2|(3/2−) |- | α (0,15%) | 239Am |- | rowspan=2|244Bk | rowspan=2 style="text-align:right" | 97 | rowspan=2 style="text-align:right" | 147 | rowspan=2|244,065181(16) | rowspan=2|4,35(15) jam | β+ (99,99%) | 244Cm | rowspan=2|(4−)# |- | α (0,006%) | 240Am |- | rowspan=2|245Bk | rowspan=2 style="text-align:right" | 97 | rowspan=2 style="text-align:right" | 148 | rowspan=2|245,0663616(25) | rowspan=2|4,94(3) hri | EC (99,88%) | 245Cm | rowspan=2|3/2− |- | α (0,12%) | 241Am |- | rowspan=2|246Bk | rowspan=2 style="text-align:right" | 97 | rowspan=2 style="text-align:right" | 149 | rowspan=2|246,06867(6) | rowspan=2|1,80(2) hri | EC (99,8%) | 246Cm | rowspan=2|2(−) |- | α (0,2%) | 242Am |- | rowspan=2|247Bk | rowspan=2 style="text-align:right" | 97 | rowspan=2 style="text-align:right" | 150 | rowspan=2|247,070307(6) | rowspan=2|1,38(25) thn | α | 243Am | rowspan=2|(3/2−) |- | SF (langka) | (beberapa) |- | 248Bk | style="text-align:right" | 97 | style="text-align:right" | 151 | 248,07309(8)# | >300 thn[4] | α | 244Am | 6+# |- | style="text-indent:1em" | 248mBk | colspan="3" style="text-indent:2em" | 30(70)# keV | 23,7(2) jam | β− | 248Cf | 1(−) |- | rowspan=3|249Bk[5] | rowspan=3 style="text-align:right" | 97 | rowspan=3 style="text-align:right" | 152 | rowspan=3|249,0749867(28) | rowspan=3|330(4) hri | β− | 249Cf | rowspan=3|7/2+ |- | α (0,00145%) | 245Am |- | SF (4,7%) | (beberapa) |- | style="text-indent:1em" | 249mBk | colspan="3" style="text-indent:2em" | 8,80(10) keV | 300 μdtk | IT | 249Bk | (3/2−) |- | 250Bk | style="text-align:right" | 97 | style="text-align:right" | 153 | 250,078317(4) | 3,212(5) jam | β− | 250Cf | 2− |- | style="text-indent:1em" | 250m1Bk | colspan="3" style="text-indent:2em" | 35,59(5) keV | 29(1) μdtk | IT | 250Bk | (4+) |- | style="text-indent:1em" | 250m2Bk | colspan="3" style="text-indent:2em" | 84,1(21) keV | 213(8) μdtk | | | (7+) |- | rowspan=2|251Bk | rowspan=2 style="text-align:right" | 97 | rowspan=2 style="text-align:right" | 154 | rowspan=2|251,080760(12) | rowspan=2|55,6(11) mnt | β− | 251Cf | rowspan=2|(3/2−)# |- | α (10−5%) | 247Am |- | style="text-indent:1em" | 251mBk | colspan="3" style="text-indent:2em" | 35,5(13) keV | 58(4) μdtk | IT | 251Bk | (7/2+)# |- | rowspan=2|252Bk | rowspan=2 style="text-align:right" | 97 | rowspan=2 style="text-align:right" | 155 | rowspan=2|252,08431(22)# | rowspan=2|1,8(5) mnt | β− | 252Cf | rowspan=2| |- | α | 248Am |- | 253Bk | style="text-align:right" | 97 | style="text-align:right" | 156 | 253,08688(39)# | 10# mnt | β− | 253Cf |

Aktinida vs produk fisi

Referensi

  1. ↑ "Observation of new neutron-deficient isotopes with Z ≥ 92 in multinucleon transfer reactions" http://inspirehep.net/record/1383747/files/scoap3-fulltext.pdf
  2. ↑ D. Kaji. Decay Properties of New Isotopes 234 Bk and 230 Am, and Even–Even Nuclides 234 Cm and 230 Pu. Journal of the Physical Society of Japan. 2016. Vol. 84 (15002). hlm. 015002. doi:10.7566/JPSJ.85.015002.
  3. ↑ J. Konki. Towards saturation of the electron-capture delayed fission probability: The new isotopes 240 Es and 236 Bk. Physics Letters B. 10 Januari 2017. Vol. 764. hlm. 265–270. doi:10.1016/j.physletb.2016.11.038.
  4. ↑ J. Milsted. The alpha half-life of berkelium-247; a new long-lived isomer of berkelium-248. Nuclear Physics. 1965. Vol. 71 (2). hlm. 299. doi:10.1016/0029-5582(65)90719-4.
  5. ↑ Isotop yang paling mudah untuk disintesis

Sumber dan atribusi

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