Nuklida · radioaktif
Besi-55 (⁵⁵Fe)
Besi-55 (⁵⁵Fe) adalah isotop radioaktif besi dengan 26 proton dan 29 neutron (nomor massa 55). Waktu paruhnya 2,7562 tahun (± 0,0004 tahun), meluruh terutama lewat penangkapan elektron (ε).
Data nuklida
- Unsur
- Besi (Fe, Z = 26)
- Nomor massa (A)
- 55
- Proton (Z)
- 26
- Neutron (N)
- 29
- Massa atom
- 54.938291158 ± 0.00000033 u
- Waktu paruh
- 2,7562 tahun (± 0,0004 tahun)
- Mode peluruhan
- Penangkapan elektron (ε) ( 100 %)
- Inti anak
- Mangan-55 (⁵⁵Mn)
- Tahun penemuan
- 1939
- Sumber data
- IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem
Kegunaan isotop besi
- Natural iron enriched in its least abundant stable isotopes, 57Fe and 58Fe, are used as a tracer in human studies to assess absorption, excretion, distribution, and utilization of iron in basic and applied research,,,,,. The two radioisotopes, 55Fe and 59Fe, have sufficiently long half-lives of 2.75 years and 44.5 days, respectively, to be used as tracers, but potential health and environmental hazards limit their use to diagnostic applications in patient care (i.e. disorders of blood and of iron metabolism),,.
- 55Fe is a beta emitting nuclide that serves as an electron source together with 63Ni (with a half-life of 99 years) in electron-capture detectors. Electron-capture detectors are used as thickness gauges or as detectors for organic analytes in gas chromatography.
Isotop besi lainnya
⁴⁵Fe, ⁴⁶Fe, ⁴⁷Fe, ⁴⁸Fe, ⁴⁹Fe, ⁵⁰Fe, ⁵¹Fe, ⁵²Fe, ⁵³Fe, ⁵⁴Fe, ⁵⁶Fe, ⁵⁷Fe, ⁵⁸Fe, ⁵⁹Fe, ⁶⁰Fe, ⁶¹Fe, ⁶²Fe, ⁶³Fe, ⁶⁴Fe, ⁶⁵Fe, ⁶⁶Fe, ⁶⁷Fe, ⁶⁸Fe, ⁶⁹Fe, ⁷⁰Fe, ⁷¹Fe, ⁷²Fe, ⁷³Fe, ⁷⁴Fe, ⁷⁵Fe, ⁷⁶Fe