Promethium-163

Properties and data of the isotope ¹⁶³Pm.

Contents

General data

Name of the isotope:Promethium-163; Pm-163Symbol:¹⁶³Pm or 16361PmMass number A:163 (= number of nucleons)Atomic number Z:61 (= number of protons)Neutrons N:102Isotopic mass:162.95357(43) u (atomic weight of Promethium-163)Nuclide mass:162.9201092 u (calculated nuclear mass without electrons)Mass excess:-43.24927 MeVMass defect:1.407578384 u (per nucleus)Nuclear binding energy:1311.15081923 MeV (per nucleus)
8.04387006 MeV (average binding energy per nucleon)Separation energy:S_N = 3.21(44) MeV (first neutron)
S_P = 4.95(50) MeV (first proton)Half-life:0.43(35) sDecay constant λ:1.6119701873487 s^-1Specific activity α:5.992291068044 × 10⁺²¹ Bq g^-1
161953812649.86 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:2012

Radioactive Decay

Half-life T_½ = 0.43(35) s respectively 4.3 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁶³Sm	100 %	7.47(50) MeV
β^-, n	¹⁶²Sm	?	3.21(44) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 102) and isobaric (same nucleon number A = 163) with Promethium-163. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 102	Isobar A = 163
60	¹⁶²Nd	¹⁶³Nd
61	¹⁶³Pm	¹⁶³Pm
62	¹⁶⁴Sm	¹⁶³Sm
63	¹⁶⁵Eu	¹⁶³Eu
64	¹⁶⁶Gd	¹⁶³Gd
65	¹⁶⁷Tb	¹⁶³Tb
66	¹⁶⁸Dy	¹⁶³Dy
67	¹⁶⁹Ho	¹⁶³Ho
68	¹⁷⁰Er	¹⁶³Er
69	¹⁷¹Tm	¹⁶³Tm
70	¹⁷²Yb	¹⁶³Yb
71	¹⁷³Lu	¹⁶³Lu
72	¹⁷⁴Hf	¹⁶³Hf
73	¹⁷⁵Ta	¹⁶³Ta
74	¹⁷⁶W	¹⁶³W
75	¹⁷⁷Re	¹⁶³Re
76	¹⁷⁸Os	¹⁶³Os
77	¹⁷⁹Ir
78	¹⁸⁰Pt
79	¹⁸¹Au
80	¹⁸²Hg
81	¹⁸³Tl
82	¹⁸⁴Pb
83	¹⁸⁵Bi
84	¹⁸⁶Po