Lanthanum-150

Properties and data of the isotope ¹⁵⁰La.

Contents

General data

Name of the isotope:Lanthanum-150; La-150Symbol:¹⁵⁰La or 15057LaMass number A:150 (= number of nucleons)Atomic number Z:57 (= number of protons)Neutrons N:93Isotopic mass:149.93974(47) u (atomic weight of Lanthanum-150)Nuclide mass:149.9084731 u (calculated nuclear mass without electrons)Mass excess:-56.13183 MeVMass defect:1.312124012 u (per nucleus)Nuclear binding energy:1222.23564443 MeV (per nucleus)
8.14823763 MeV (average binding energy per nucleon)Separation energy:S_N = 3.98(48) MeV (first neutron)
S_P = 10.30(62) MeV (first proton)Half-life:0.59(11) sDecay constant λ:1.1748257297626 s^-1Specific activity α:4.748299349334 × 10⁺²¹ Bq g^-1
128332414846.88 Ci g^-1Spin and parity:
(nuclear angular momentum)(3+)Year of discovery:1993

Radioactive Decay

Half-life T_½ = 0.59(11) s respectively 5.9 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁵⁰Ce	97.3 %	8.72(44) MeV
β^-, n	¹⁴⁹Ce	2.7(3) %	2.47(44) MeV

Parent Nuclides

Direct parent isotope is: ¹⁵⁰Ba.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 93) and isobaric (same nucleon number A = 150) with Lanthanum-150. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 93	Isobar A = 150
54	¹⁴⁷Xe
55	¹⁴⁸Cs	¹⁵⁰Cs
56	¹⁴⁹Ba	¹⁵⁰Ba
57	¹⁵⁰La	¹⁵⁰La
58	¹⁵¹Ce	¹⁵⁰Ce
59	¹⁵²Pr	¹⁵⁰Pr
60	¹⁵³Nd	¹⁵⁰Nd
61	¹⁵⁴Pm	¹⁵⁰Pm
62	¹⁵⁵Sm	¹⁵⁰Sm
63	¹⁵⁶Eu	¹⁵⁰Eu
64	¹⁵⁷Gd	¹⁵⁰Gd
65	¹⁵⁸Tb	¹⁵⁰Tb
66	¹⁵⁹Dy	¹⁵⁰Dy
67	¹⁶⁰Ho	¹⁵⁰Ho
68	¹⁶¹Er	¹⁵⁰Er
69	¹⁶²Tm	¹⁵⁰Tm
70	¹⁶³Yb	¹⁵⁰Yb
71	¹⁶⁴Lu	¹⁵⁰Lu
72	¹⁶⁵Hf
73	¹⁶⁶Ta
74	¹⁶⁷W
75	¹⁶⁸Re
76	¹⁶⁹Os
77	¹⁷⁰Ir
78	¹⁷¹Pt
79	¹⁷²Au
80	¹⁷³Hg