Praseodymium-145

Properties and data of the isotope ¹⁴⁵Pr.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Praseodymium-145; Pr-145Symbol:¹⁴⁵Pr or 14559PrMass number A:145 (= number of nucleons)Atomic number Z:59 (= number of protons)Neutrons N:86Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.4576271186441 (= neutron-proton ratio)Neutron excess (N-Z):27Isotopic mass:144.914518(8) u (atomic weight of Praseodymium-145)Nuclide mass:144.8821542 u (calculated nuclear mass without electrons)Mass excess:-79.62597 MeVMass defect:1.292341664 u (per nucleus)Nuclear binding energy:1203.80850597 MeV (per nucleus)
8.30212763 MeV (average binding energy per nucleon)Separation energy:S_N = 6.947(7) MeV (first neutron)
S_P = 6.483(7) MeV (first proton)Half-life:5.984(10) hDecay constant λ:3.217594978089 × 10^-5 s^-1Specific activity α:1.345611818630 × 10⁺¹⁷ Bq g^-1
3636788.6990014 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2+Year of discovery:1954

Radioactive Decay

Half-life T_½ = 5.984(10) h (hours) respectively 2.15424 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁴⁵Nd	100 %	1.806(7) MeV

Parent Nuclides

Direct parent isotope is: ¹⁴⁵Ce.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 86) and isobaric (same nucleon number A = 145) with Praseodymium-145. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 86	Isobar A = 145
48	¹³⁴Cd
49	¹³⁵In
50	¹³⁶Sn
51	¹³⁷Sb
52	¹³⁸Te
53	¹³⁹I	¹⁴⁵I
54	¹⁴⁰Xe	¹⁴⁵Xe
55	¹⁴¹Cs	¹⁴⁵Cs
56	¹⁴²Ba	¹⁴⁵Ba
57	¹⁴³La	¹⁴⁵La
58	¹⁴⁴Ce	¹⁴⁵Ce
59	¹⁴⁵Pr	¹⁴⁵Pr
60	¹⁴⁶Nd	¹⁴⁵Nd
61	¹⁴⁷Pm	¹⁴⁵Pm
62	¹⁴⁸Sm	¹⁴⁵Sm
63	¹⁴⁹Eu	¹⁴⁵Eu
64	¹⁵⁰Gd	¹⁴⁵Gd
65	¹⁵¹Tb	¹⁴⁵Tb
66	¹⁵²Dy	¹⁴⁵Dy
67	¹⁵³Ho	¹⁴⁵Ho
68	¹⁵⁴Er	¹⁴⁵Er
69	¹⁵⁵Tm	¹⁴⁵Tm
70	¹⁵⁶Yb
71	¹⁵⁷Lu
72	¹⁵⁸Hf
73	¹⁵⁹Ta
74	¹⁶⁰W
75	¹⁶¹Re
76	¹⁶²Os