Promethium-150

Properties and data of the isotope ¹⁵⁰Pm.

Content

General data

Name of the isotope:Promethium-150; Pm-150Symbol:¹⁵⁰Pm or 15061PmMass number A:150 (= number of nucleons)Atomic number Z:61 (= number of protons)Neutrons N:89Isotopic mass:149.920990(22) u (atomic weight of Promethium-150)Nuclide mass:149.8875292 u (calculated nuclear mass without electrons)Mass excess:-73.59734 MeVMass defect:1.327514476 u (per nucleus)Nuclear binding energy:1236.57176931 MeV (per nucleus)
8.2438118 MeV (average binding energy per nucleon)Separation energy:S_N = 5.604(20) MeV (first neutron)
S_P = 6.511(20) MeV (first proton)Half-life:2.698(15) hDecay constant λ:7.13643007742 × 10^-5 s^-1Specific activity α:2.884334708948 × 10⁺¹⁷ Bq g^-1
7795499.2133741 Ci g^-1Spin and parity:
(nuclear angular momentum)(1-)Year of discovery:1952

Radioactive Decay

Half-life T_½ = 2.698(15) h (hours) respectively 9.7128 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁵⁰Sm	100 %	3.454(20) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 89) and isobaric (same nucleon number A = 150) with Promethium-150. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 89	Isobar A = 150
50	¹³⁹Sn
51	¹⁴⁰Sb
52	¹⁴¹Te
53	¹⁴²I
54	¹⁴³Xe
55	¹⁴⁴Cs	¹⁵⁰Cs
56	¹⁴⁵Ba	¹⁵⁰Ba
57	¹⁴⁶La	¹⁵⁰La
58	¹⁴⁷Ce	¹⁵⁰Ce
59	¹⁴⁸Pr	¹⁵⁰Pr
60	¹⁴⁹Nd	¹⁵⁰Nd
61	¹⁵⁰Pm	¹⁵⁰Pm
62	¹⁵¹Sm	¹⁵⁰Sm
63	¹⁵²Eu	¹⁵⁰Eu
64	¹⁵³Gd	¹⁵⁰Gd
65	¹⁵⁴Tb	¹⁵⁰Tb
66	¹⁵⁵Dy	¹⁵⁰Dy
67	¹⁵⁶Ho	¹⁵⁰Ho
68	¹⁵⁷Er	¹⁵⁰Er
69	¹⁵⁸Tm	¹⁵⁰Tm
70	¹⁵⁹Yb	¹⁵⁰Yb
71	¹⁶⁰Lu	¹⁵⁰Lu
72	¹⁶¹Hf
73	¹⁶²Ta
74	¹⁶³W
75	¹⁶⁴Re
76	¹⁶⁵Os
77	¹⁶⁶Ir
78	¹⁶⁷Pt