Cerium-141

Properties and data of the isotope ¹⁴¹Ce.

Contents

General Data

Radioactive Decay

Parent Nuclides

NMR Data

Isotones und Isobares

Literature

Cerium-141 is a radioisotope of the chemical element cerium, which has 83 neutrons in its atomic nucleus in addition to the element-specific 58 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 141. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical technical, medical, or industrial significance; the study of ¹⁴¹Ce is exclusively for academic purposes.

Cerium-141 was first identified in 1948. The isotope was produced by bombarding barium metal with 20 MeV α-particles in the reaction ¹³⁸Ba(α,n)¹⁴¹Ce as well as by the reactions ¹⁴⁰Ce(d,p)¹⁴¹Ce and ¹⁴²Ce(n,2n)¹⁴¹Ce [1].

See also: List of individual Cerium isotopes (and general data sources).

General data

Name of the isotope:Cerium-141; Ce-141Symbol:¹⁴¹Ce or 14158CeMass number A:141 (= number of nucleons)Atomic number Z:58 (= number of protons)Neutrons N:83Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.4310344827586 (= neutron-proton ratio)Neutron excess (N-Z):25Isotopic mass:140.9082860(14) u (atomic weight of Cerium-141)Nuclide mass:140.8764706 u (calculated nuclear mass without electrons)Mass excess:-85.43104 MeVMass defect:1.264753884 u (per nucleus)Nuclear binding energy:1178.11065442 MeV (per nucleus)
8.35539471 MeV (average binding energy per nucleon)Separation energy:S_N = 5.42815(10) MeV (first neutron)
S_P = 8.4080(13) MeV (first proton)Half-life:32.504(13) dDecay constant λ:2.468169090584 × 10^-7 s^-1Specific activity α:1.061690137831 × 10⁺¹⁵ Bq g^-1
28694.328049503 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2-Magnetic dipole moment:μ(μ_N) = 1.09(4)Year of discovery:1948

Radioactive Decay

Half-life T_½ = 32.504(13) d respectively 2.8083456 × 10⁶ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁴¹Pr	100 %	0.5835(12) MeV	0.1454433(14) MeV 48.3 %

Parent Nuclides

Direct parent isotope is: ¹⁴¹La.

NMR data

Nuclear magnetic properties and parameters of the NMR active Nuclide ¹⁴¹Ce

Isotope:¹⁴¹Ce-NMRQuantity:Does not occur in nature!Spin:7/2-Nuclearmagnetic moment
μ/μ_N:1.09(4)Nuclear g-factor:g_l = 0.31142857142857Resonance frequency:v₀ = 2.37 MHz at 1 TRelative Sensitivity:[related to ¹H = 1.000]:
0.00364 (H₀ = const.)
1.1709 (v₀ = const.)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 83) and isobaric (same nucleon number A = 141) with Cerium-141. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 83	Isobar A = 141
46	¹²⁹Pd
47	¹³⁰Ag
48	¹³¹Cd
49	¹³²In
50	¹³³Sn
51	¹³⁴Sb	¹⁴¹Sb
52	¹³⁵Te	¹⁴¹Te
53	¹³⁶I	¹⁴¹I
54	¹³⁷Xe	¹⁴¹Xe
55	¹³⁸Cs	¹⁴¹Cs
56	¹³⁹Ba	¹⁴¹Ba
57	¹⁴⁰La	¹⁴¹La
58	¹⁴¹Ce	¹⁴¹Ce
59	¹⁴²Pr	¹⁴¹Pr
60	¹⁴³Nd	¹⁴¹Nd
61	¹⁴⁴Pm	¹⁴¹Pm
62	¹⁴⁵Sm	¹⁴¹Sm
63	¹⁴⁶Eu	¹⁴¹Eu
64	¹⁴⁷Gd	¹⁴¹Gd
65	¹⁴⁸Tb	¹⁴¹Tb
66	¹⁴⁹Dy	¹⁴¹Dy
67	¹⁵⁰Ho	¹⁴¹Ho
68	¹⁵¹Er
69	¹⁵²Tm
70	¹⁵³Yb
71	¹⁵⁴Lu
72	¹⁵⁵Hf
73	¹⁵⁶Ta
74	¹⁵⁷W