Nuklida · stabil · alami
Serium-138 (¹³⁸Ce)
Serium-138 (¹³⁸Ce) adalah isotop stabil serium dengan 58 proton dan 80 neutron (nomor massa 138). Kelimpahan alaminya 0.002 51(2).
Data nuklida
- Unsur
- Serium (Ce, Z = 58)
- Nomor massa (A)
- 138
- Proton (Z)
- 58
- Neutron (N)
- 80
- Massa atom
- 137.905994180 ± 0.000000536 u
- Waktu paruh
- Stable >44Py
- Mode peluruhan
- Peluruhan beta plus ganda
- Inti anak
- Barium-138 (¹³⁸Ba)
- Kelimpahan alami
- 0.002 51(2)
- Tahun penemuan
- 1936
- Sumber data
- IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem
Kegunaan isotop serium
- When combined, 138La– 138Ce and 147Sm– 143Nd are two decay systems that are useful for studying processes affecting the light-rare-earth elements (lanthanum, cerium, praseodymium, neodymium, and samarium) and the igneous evolution of the Moon and Earth because different igneous materials have different cerium isotopic compositions (Fig. IUPAC.58.1) and can be used in mass balance investigations,.
- 138Ce is a radiogenic isotope produced by decay of 138La, with a half-life of 1.06×1011 years, one of the longest clocks in geochronology. Thus, the isotope-amount ratio n(138Ce)/n(142Ce) can be used for dating rocks on long time scales (billions of years) and can also be used as a chemical tracer in geochemical studies.
Isotop serium lainnya
¹¹⁹Ce, ¹²⁰Ce, ¹²¹Ce, ¹²²Ce, ¹²³Ce, ¹²⁴Ce, ¹²⁵Ce, ¹²⁶Ce, ¹²⁷Ce, ¹²⁸Ce, ¹²⁹Ce, ¹³⁰Ce, ¹³¹Ce, ¹³²Ce, ¹³³Ce, ¹³⁴Ce, ¹³⁵Ce, ¹³⁶Ce, ¹³⁷Ce, ¹³⁹Ce, ¹⁴⁰Ce, ¹⁴¹Ce, ¹⁴²Ce, ¹⁴³Ce, ¹⁴⁴Ce, ¹⁴⁵Ce, ¹⁴⁶Ce, ¹⁴⁷Ce, ¹⁴⁸Ce, ¹⁴⁹Ce, ¹⁵⁰Ce, ¹⁵¹Ce, ¹⁵²Ce, ¹⁵³Ce, ¹⁵⁴Ce, ¹⁵⁵Ce, ¹⁵⁶Ce, ¹⁵⁷Ce, ¹⁵⁸Ce, ¹⁵⁹Ce