Nuklida · radioaktif · alami
Samarium-147 (¹⁴⁷Sm)
Samarium-147 (¹⁴⁷Sm) adalah isotop radioaktif samarium dengan 62 proton dan 85 neutron (nomor massa 147). Waktu paruhnya 106,6 miliar tahun (± 0,5 miliar tahun), meluruh terutama lewat peluruhan alfa (α). Kelimpahan alaminya 0.1500(14).
Data nuklida
- Nomor massa (A)
- 147
- Proton (Z)
- 62
- Neutron (N)
- 85
- Massa atom
- 146.914904401 ± 0.000001354 u
- Waktu paruh
- 106,6 miliar tahun (± 0,5 miliar tahun)
- Mode peluruhan
- Peluruhan alfa (α) ( 100 %)
- Inti anak
- Neodimium-143 (¹⁴³Nd)
- Kelimpahan alami
- 0.1500(14)
- Tahun penemuan
- 1933
- Sumber data
- IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem
Kegunaan isotop samarium
- One possible origin for the Moon is from debris ejected by an indirect giant impact of Earth by an astronomical body the size of Mars when the Earth was forming. The kinetic energy liberated is thought to have melted a large part of the Moon forming a lunar magma ocean. Samarium isotope measurement results, along with measurements of isotopes of hafnium, tungsten, and neodymium, suggest that lunar magma formed about 70×106 years after the Solar System formed and had crystallized by about 215×106 years after formation. 147Sm (with a half-life of 1.06×1011 years) is used to study the formation of potassium, rare earth elements, and phosphorus-rich rocks.
- 147Sm is used for determining formation ages of igneous and metamorphic rocks via analysis of the minerals which compose them, such as those shown in Fig. IUPAC.62.1,,.
- 147Sm bombarded with 40Ca produces the radioisotope 182Pb.
Isotop samarium lainnya
¹²⁸Sm, ¹²⁹Sm, ¹³⁰Sm, ¹³¹Sm, ¹³²Sm, ¹³³Sm, ¹³⁴Sm, ¹³⁵Sm, ¹³⁶Sm, ¹³⁷Sm, ¹³⁸Sm, ¹³⁹Sm, ¹⁴⁰Sm, ¹⁴¹Sm, ¹⁴²Sm, ¹⁴³Sm, ¹⁴⁴Sm, ¹⁴⁵Sm, ¹⁴⁶Sm, ¹⁴⁸Sm, ¹⁴⁹Sm, ¹⁵⁰Sm, ¹⁵¹Sm, ¹⁵²Sm, ¹⁵³Sm, ¹⁵⁴Sm, ¹⁵⁵Sm, ¹⁵⁶Sm, ¹⁵⁷Sm, ¹⁵⁸Sm, ¹⁵⁹Sm, ¹⁶⁰Sm, ¹⁶¹Sm, ¹⁶²Sm, ¹⁶³Sm, ¹⁶⁴Sm, ¹⁶⁵Sm, ¹⁶⁶Sm, ¹⁶⁷Sm, ¹⁶⁸Sm