Nuklida · radioaktif
Terbium-149 (¹⁴⁹Tb)
Terbium-149 (¹⁴⁹Tb) adalah isotop radioaktif terbium dengan 65 proton dan 84 neutron (nomor massa 149). Waktu paruhnya 4,118 jam (± 0,025 jam), meluruh terutama lewat peluruhan beta plus (β⁺).
Data nuklida
- Unsur
- Terbium (Tb, Z = 65)
- Nomor massa (A)
- 149
- Proton (Z)
- 65
- Neutron (N)
- 84
- Massa atom
- 148.923253792 ± 0.000003895 u
- Waktu paruh
- 4,118 jam (± 0,025 jam)
- Mode peluruhan
- Peluruhan beta plus (β⁺) ( 83,3 %), Peluruhan alfa (α) ( 16,7 %)
- Inti anak
- Gadolinium-149 (¹⁴⁹Gd), Europium-145 (¹⁴⁵Eu)
- Tahun penemuan
- 1950
- Sumber data
- IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem
Kegunaan isotop terbium
- 149Tb (with a half-life of 4.1 h) is being used in targeted radiotherapy using alpha particles for labeling radioimmunoconjugates in cancer treatments,. 161Tb (with a half-life of 6.9 days) attached to a bioconjugate (two covalently linked molecules, one or more of which is a biomolecule), is being used in cancer therapy as a targeted radiation treatment of cancer cells,. 161Tb is being used for imaging as it allows for on-line monitoring of its distribution using gamma cameras. 149Tb is produced by the reaction 142Nd(12C,5n) 149Dy, which is followed by a subsequent positron decay reaction 149Dy→ 149Tb+β +. It can also be produced by the reaction 141Pr(12C,4n) 149Tb; beam geometry is important for satisfactory yield of 149Tb (Fig. IUPAC.65.1).
Isotop terbium lainnya
¹³⁵Tb, ¹³⁶Tb, ¹³⁷Tb, ¹³⁸Tb, ¹³⁹Tb, ¹⁴⁰Tb, ¹⁴¹Tb, ¹⁴²Tb, ¹⁴³Tb, ¹⁴⁴Tb, ¹⁴⁵Tb, ¹⁴⁶Tb, ¹⁴⁷Tb, ¹⁴⁸Tb, ¹⁵⁰Tb, ¹⁵¹Tb, ¹⁵²Tb, ¹⁵³Tb, ¹⁵⁴Tb, ¹⁵⁵Tb, ¹⁵⁶Tb, ¹⁵⁷Tb, ¹⁵⁸Tb, ¹⁵⁹Tb, ¹⁶⁰Tb, ¹⁶¹Tb, ¹⁶²Tb, ¹⁶³Tb, ¹⁶⁴Tb, ¹⁶⁵Tb, ¹⁶⁶Tb, ¹⁶⁷Tb, ¹⁶⁸Tb, ¹⁶⁹Tb, ¹⁷⁰Tb, ¹⁷¹Tb, ¹⁷²Tb, ¹⁷³Tb, ¹⁷⁴Tb