Nuklida · radioaktif
Astatin-211 (²¹¹At)
Astatin-211 (²¹¹At) adalah isotop radioaktif astatin dengan 85 proton dan 126 neutron (nomor massa 211). Waktu paruhnya 7,214 jam (± 0,007 jam), meluruh terutama lewat penangkapan elektron (ε).
Data nuklida
- Unsur
- Astatin (At, Z = 85)
- Nomor massa (A)
- 211
- Proton (Z)
- 85
- Neutron (N)
- 126
- Massa atom
- 210.987496226 ± 0.000002929 u
- Waktu paruh
- 7,214 jam (± 0,007 jam)
- Mode peluruhan
- Penangkapan elektron (ε) ( 58,2 %), Peluruhan alfa (α) ( 41,8 %)
- Inti anak
- Polonium-211 (²¹¹Po), Bismut-207 (²⁰⁷Bi)
- Tahun penemuan
- 1940
- Sumber data
- IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem
Kegunaan isotop astatin
- 211At (with a half-life of 7.2 h) is known to accumulate in the thyroid and occasionally is the preferred treatment for hyperthyroidism and thyroid cancer because the particles emitted from 211At provide more energy than radiolabeled iodine, the other treatment method (Fig. IUPAC.85.1). However, astatine has shown a tendency to induce tumors, so its use is limited. The 211At-labeled di-carborane (cluster of boron, carbon, and hydrogen atoms) ligand known as the Venus Flytrap Cluster (VFC) has been used as a robust pharmaceutical in radiotherapy treatment.
Isotop astatin lainnya
¹⁹¹At, ¹⁹²At, ¹⁹³At, ¹⁹⁴At, ¹⁹⁵At, ¹⁹⁶At, ¹⁹⁷At, ¹⁹⁸At, ¹⁹⁹At, ²⁰⁰At, ²⁰¹At, ²⁰²At, ²⁰³At, ²⁰⁴At, ²⁰⁵At, ²⁰⁶At, ²⁰⁷At, ²⁰⁸At, ²⁰⁹At, ²¹⁰At, ²¹²At, ²¹³At, ²¹⁴At, ²¹⁵At, ²¹⁶At, ²¹⁷At, ²¹⁸At, ²¹⁹At, ²²⁰At, ²²¹At, ²²²At, ²²³At, ²²⁴At, ²²⁵At, ²²⁶At, ²²⁷At, ²²⁸At, ²²⁹At