Lanthanum-153

Properties and data of the isotope ¹⁵³La.

Content

General data

Name of the isotope:Lanthanum-153; La-153Symbol:¹⁵³La or 15357LaMass number A:153 (= number of nucleons)Atomic number Z:57 (= number of protons)Neutrons N:96Isotopic mass:152.95055(32) u (atomic weight of Lanthanum-153)Nuclide mass:152.9192831 u (calculated nuclear mass without electrons)Mass excess:-46.06238 MeVMass defect:1.32730876 u (per nucleus)Nuclear binding energy:1236.38014609 MeV (per nucleus)
8.08091599 MeV (average binding energy per nucleon)Separation energy:S_N = 4.84(42) MeV (first neutron)
S_P = 11.64(50) MeV (first proton)Half-life:245(18) msDecay constant λ:2.8291721655508 s^-1Specific activity α:1.120899559076 × 10⁺²² Bq g^-1
302945826777.38 Ci g^-1Spin and parity:
(nuclear angular momentum)(1/2+)Year of discovery:1994

Radioactive Decay

Half-life T_½ = 245(18) ms respectively 2.45 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁵³Ce	100 %	8.85(36) MeV
β^-, n	¹⁵²Ce	?	4.85(36) MeV

Parent Nuclides

Direct parent isotope is: ¹⁵³Ba.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 96) and isobaric (same nucleon number A = 153) with Lanthanum-153. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 96	Isobar A = 153
55	¹⁵¹Cs
56	¹⁵²Ba	¹⁵³Ba
57	¹⁵³La	¹⁵³La
58	¹⁵⁴Ce	¹⁵³Ce
59	¹⁵⁵Pr	¹⁵³Pr
60	¹⁵⁶Nd	¹⁵³Nd
61	¹⁵⁷Pm	¹⁵³Pm
62	¹⁵⁸Sm	¹⁵³Sm
63	¹⁵⁹Eu	¹⁵³Eu
64	¹⁶⁰Gd	¹⁵³Gd
65	¹⁶¹Tb	¹⁵³Tb
66	¹⁶²Dy	¹⁵³Dy
67	¹⁶³Ho	¹⁵³Ho
68	¹⁶⁴Er	¹⁵³Er
69	¹⁶⁵Tm	¹⁵³Tm
70	¹⁶⁶Yb	¹⁵³Yb
71	¹⁶⁷Lu	¹⁵³Lu
72	¹⁶⁸Hf	¹⁵³Hf
73	¹⁶⁹Ta
74	¹⁷⁰W
75	¹⁷¹Re
76	¹⁷²Os
77	¹⁷³Ir
78	¹⁷⁴Pt
79	¹⁷⁵Au
80	¹⁷⁶Hg
81	¹⁷⁷Tl
82	¹⁷⁸Pb