Nuklida · radioaktif
Mangan-53 (⁵³Mn)
Mangan-53 (⁵³Mn) adalah isotop radioaktif mangan dengan 25 proton dan 28 neutron (nomor massa 53). Waktu paruhnya 3,7 juta tahun (± 0,4 juta tahun), meluruh terutama lewat penangkapan elektron (ε).
Data nuklida
- Unsur
- Mangan (Mn, Z = 25)
- Nomor massa (A)
- 53
- Proton (Z)
- 25
- Neutron (N)
- 28
- Massa atom
- 52.941287497 ± 0.000000371 u
- Waktu paruh
- 3,7 juta tahun (± 0,4 juta tahun)
- Mode peluruhan
- Penangkapan elektron (ε) ( 100 %)
- Inti anak
- Kromium-53 (⁵³Cr)
- Tahun penemuan
- 1955
- Sumber data
- IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem
Kegunaan isotop mangan
- The radioactive isotope 53Mn is formed by the interaction of protons, produced by cosmic rays, on iron in rocks. The accumulation of 53Mn, having a half-life of 3.7×106 years, at the Earth’s surface enables determination of exposure ages of landforms to cosmic rays and quantification of erosion rates. For example, Schaefer et al. measured 13 samples from nine dolerite (igneous rock containing plagioclase, pyroxene, and olivine) surfaces in the Dry Valleys, Antarctica. They found that the terrestrial 53Mn concentrations correlate well with cosmic-ray-produced 3He and 21Ne concentrations in the same samples (Fig. IUPAC.25.1), which suggests that 53Mn is produced continuously in place and retained over millions of years without loss. Their results suggest that 53Mn concentrations in rocks can be used to monitor Earth-surface processes on time scales exceeding 10×106 years.
Isotop mangan lainnya
⁴³Mn, ⁴⁴Mn, ⁴⁵Mn, ⁴⁶Mn, ⁴⁷Mn, ⁴⁸Mn, ⁴⁹Mn, ⁵⁰Mn, ⁵¹Mn, ⁵²Mn, ⁵⁴Mn, ⁵⁵Mn, ⁵⁶Mn, ⁵⁷Mn, ⁵⁸Mn, ⁵⁹Mn, ⁶⁰Mn, ⁶¹Mn, ⁶²Mn, ⁶³Mn, ⁶⁴Mn, ⁶⁵Mn, ⁶⁶Mn, ⁶⁷Mn, ⁶⁸Mn, ⁶⁹Mn, ⁷⁰Mn, ⁷¹Mn, ⁷²Mn, ⁷³Mn