Promethium-162

Properties and data of the isotope ¹⁶²Pm.

Content

General data

Name of the isotope:Promethium-162; Pm-162Symbol:¹⁶²Pm or 16261PmMass number A:162 (= number of nucleons)Atomic number Z:61 (= number of protons)Neutrons N:101Isotopic mass:161.95022(32) u (atomic weight of Promethium-162)Nuclide mass:161.9167592 u (calculated nuclear mass without electrons)Mass excess:-46.36977 MeVMass defect:1.402263468 u (per nucleus)Nuclear binding energy:1306.20000686 MeV (per nucleus)
8.06296301 MeV (average binding energy per nucleon)Separation energy:S_N = 4.21(42) MeV (first neutron)
S_P = 11.07(50) MeV (first proton)Half-life:0.63(18) sDecay constant λ:1.1002336199364 s^-1Specific activity α:4.115380023661 × 10⁺²¹ Bq g^-1
111226487125.99 Ci g^-1Spin and parity:
(nuclear angular momentum)(2+)Year of discovery:2012

Radioactive Decay

Half-life T_½ = 0.63(18) s respectively 6.3 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁶²Sm	100 %	8.16(36) MeV
β^-, n	¹⁶¹Sm	?	2.23(30) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 101) and isobaric (same nucleon number A = 162) with Promethium-162. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 101	Isobar A = 162
59	¹⁶⁰Pr
60	¹⁶¹Nd	¹⁶²Nd
61	¹⁶²Pm	¹⁶²Pm
62	¹⁶³Sm	¹⁶²Sm
63	¹⁶⁴Eu	¹⁶²Eu
64	¹⁶⁵Gd	¹⁶²Gd
65	¹⁶⁶Tb	¹⁶²Tb
66	¹⁶⁷Dy	¹⁶²Dy
67	¹⁶⁸Ho	¹⁶²Ho
68	¹⁶⁹Er	¹⁶²Er
69	¹⁷⁰Tm	¹⁶²Tm
70	¹⁷¹Yb	¹⁶²Yb
71	¹⁷²Lu	¹⁶²Lu
72	¹⁷³Hf	¹⁶²Hf
73	¹⁷⁴Ta	¹⁶²Ta
74	¹⁷⁵W	¹⁶²W
75	¹⁷⁶Re	¹⁶²Re
76	¹⁷⁷Os	¹⁶²Os
77	¹⁷⁸Ir
78	¹⁷⁹Pt
79	¹⁸⁰Au
80	¹⁸¹Hg
81	¹⁸²Tl
82	¹⁸³Pb
83	¹⁸⁴Bi