Nuklida · radioaktif
Praseodimium-140 (¹⁴⁰Pr)
Praseodimium-140 (¹⁴⁰Pr) adalah isotop radioaktif praseodimium dengan 59 proton dan 81 neutron (nomor massa 140). Waktu paruhnya 3,39 menit (± 0,01 menit), meluruh terutama lewat peluruhan beta plus (β⁺).
Data nuklida
- Nomor massa (A)
- 140
- Proton (Z)
- 59
- Neutron (N)
- 81
- Massa atom
- 139.909085600 ± 0.000006593 u
- Waktu paruh
- 3,39 menit (± 0,01 menit)
- Mode peluruhan
- Peluruhan beta plus (β⁺) ( 100 %), Penangkapan elektron (ε) ( 51,3 %)
- Inti anak
- Serium-140 (¹⁴⁰Ce), Serium-140 (¹⁴⁰Ce)
- Tahun penemuan
- 1938
- Sumber data
- IAEA Atomic Mass Data Center (NUBASE) and IUPAC CIAAW, via PubChem
Kegunaan isotop praseodimium
- Because of its relatively short half-life (19.12 h) and decay primarily by beta decay (96.3 percent beta decay and 3.7 percent alpha decay), 142Pr has been proposed for two main innovative applications in medicine, namely in microsphere brachytherapy and in eye plaque brachytherapy. 142Pr is advantageous because penetration of the beta fraction of the radiation is limited to a few millimeters in tissue, therefore limiting the dose of radiation to the treated site. 142Pr may be produced either by fast neutron activation or thermal neutron activation of stable 141Pr. Research in metal-bearing radiopharmaceuticals is being conducted to determine the most efficient way to produce and process radioactive metals for in vivo tracing. This research has led to the development of a potential radionuclide generator that administers radioactive metal complexes to be observed during positron emission tomography (PET) imaging. A n(140Nd)/n(140Pr) amount-ratio radionuclide generator has been designed to administer 140Pr complexes, such as 140Pr-DTPA, to be used as a tracer during a PET scan. The half-life of 140Pr is 3.4 min. The n(140Nd)/n(140Pr) ratio radionuclide generators can also be used for administering 140Pr-phosphonate complexes to identify the development of skeletal metastases. Once the skeletal metastases are found, 153Sm-EDTMP can be administered as a radiotherapeutic agent to treat bone cancer (Fig. IUPAC.59.1). The half-life of 153Sm is 1.9 days.
Isotop praseodimium lainnya
¹²¹Pr, ¹²²Pr, ¹²³Pr, ¹²⁴Pr, ¹²⁵Pr, ¹²⁶Pr, ¹²⁷Pr, ¹²⁸Pr, ¹²⁹Pr, ¹³⁰Pr, ¹³¹Pr, ¹³²Pr, ¹³³Pr, ¹³⁴Pr, ¹³⁵Pr, ¹³⁶Pr, ¹³⁷Pr, ¹³⁸Pr, ¹³⁹Pr, ¹⁴¹Pr, ¹⁴²Pr, ¹⁴³Pr, ¹⁴⁴Pr, ¹⁴⁵Pr, ¹⁴⁶Pr, ¹⁴⁷Pr, ¹⁴⁸Pr, ¹⁴⁹Pr, ¹⁵⁰Pr, ¹⁵¹Pr, ¹⁵²Pr, ¹⁵³Pr, ¹⁵⁴Pr, ¹⁵⁵Pr, ¹⁵⁶Pr, ¹⁵⁷Pr, ¹⁵⁸Pr, ¹⁵⁹Pr, ¹⁶⁰Pr, ¹⁶¹Pr