Nuklida · stabil · alami
Neodimium-142 (¹⁴²Nd)
Neodimium-142 (¹⁴²Nd) adalah isotop stabil neodimium dengan 60 proton dan 82 neutron (nomor massa 142). Kelimpahan alaminya 0.271 52(40).
Data nuklida
- Nomor massa (A)
- 142
- Proton (Z)
- 60
- Neutron (N)
- 82
- Massa atom
- 141.907728824 ± 0.000001348 u
- Waktu paruh
- Stabil
- Mode peluruhan
- Tidak meluruh
- Kelimpahan alami
- 0.271 52(40)
- Tahun penemuan
- 1924
- Sumber data
- IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem
Kegunaan isotop neodimium
- 143Nd is a radiogenic isotope produced by decay of 147Sm, with a half-life of 1.06×1011 years. Thus, the isotope-amount ratio n(143Nd)/n(144Nd) can be used for dating rocks on long time scales and as a chemical tracer in geochemistry (Fig. IUPAC.60.1),. The very small accumulation of 142Nd in billion-year-old metamorphosed rocks from Greenland [from the relatively short-lived (about 68×106 years) alpha decay of 146Sm] provided evidence that the crust of the Earth formed before the young planet was more than 100×106 years old. This is because only a short amount of time could have elapse to incorporate the 146Sm parent radionuclide into the ancient Greenland minerals before it decayed,.
Isotop neodimium lainnya
¹²⁴Nd, ¹²⁵Nd, ¹²⁶Nd, ¹²⁷Nd, ¹²⁸Nd, ¹²⁹Nd, ¹³⁰Nd, ¹³¹Nd, ¹³²Nd, ¹³³Nd, ¹³⁴Nd, ¹³⁵Nd, ¹³⁶Nd, ¹³⁷Nd, ¹³⁸Nd, ¹³⁹Nd, ¹⁴⁰Nd, ¹⁴¹Nd, ¹⁴³Nd, ¹⁴⁴Nd, ¹⁴⁵Nd, ¹⁴⁶Nd, ¹⁴⁷Nd, ¹⁴⁸Nd, ¹⁴⁹Nd, ¹⁵⁰Nd, ¹⁵¹Nd, ¹⁵²Nd, ¹⁵³Nd, ¹⁵⁴Nd, ¹⁵⁵Nd, ¹⁵⁶Nd, ¹⁵⁷Nd, ¹⁵⁸Nd, ¹⁵⁹Nd, ¹⁶⁰Nd, ¹⁶¹Nd, ¹⁶²Nd, ¹⁶³Nd