Praseodymium-144

Properties and data of the isotope ¹⁴⁴Pr.

Content

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: list of Praseodymium isotopes.

General data

Name of the isotope:Praseodymium-144; Pr-144Symbol:¹⁴⁴Pr or 14459PrMass number A:144 (= number of nucleons)Atomic number Z:59 (= number of protons)Neutrons N:85Isotopic mass:143.9133107(29) u (atomic weight of Praseodymium-144)Nuclide mass:143.8809469 u (calculated nuclear mass without electrons)Mass excess:-80.75056 MeVMass defect:1.284884048 u (per nucleus)Nuclear binding energy:1196.86178141 MeV (per nucleus)
8.31154015 MeV (average binding energy per nucleon)Separation energy:S_N = 5.7537(28) MeV (first neutron)
S_P = 6.433(3) MeV (first proton)Half-life:17.28(5) minDecay constant λ:0.00066854473433637 s^-1Specific activity α:2.815433958980 × 10⁺¹⁸ Bq g^-1
76092809.702184 Ci g^-1Spin and parity:
(nuclear angular momentum)0-Year of discovery:1951

Radioactive Decay

Half-life T_½ = 17.28(5) min (minutes) respectively 1.0368 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁴⁴Nd	100 %	2.9974(24) MeV

Parent Nuclides

Direct parent isotope is: ¹⁴⁴Ce.

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^144mPr	59.03(3) keV	7.2(3) min	3-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 85) and isobaric (same nucleon number A = 144) with Praseodymium-144. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 85	Isobar A = 144
47	¹³²Ag
48	¹³³Cd
49	¹³⁴In
50	¹³⁵Sn
51	¹³⁶Sb
52	¹³⁷Te
53	¹³⁸I	¹⁴⁴I
54	¹³⁹Xe	¹⁴⁴Xe
55	¹⁴⁰Cs	¹⁴⁴Cs
56	¹⁴¹Ba	¹⁴⁴Ba
57	¹⁴²La	¹⁴⁴La
58	¹⁴³Ce	¹⁴⁴Ce
59	¹⁴⁴Pr	¹⁴⁴Pr
60	¹⁴⁵Nd	¹⁴⁴Nd
61	¹⁴⁶Pm	¹⁴⁴Pm
62	¹⁴⁷Sm	¹⁴⁴Sm
63	¹⁴⁸Eu	¹⁴⁴Eu
64	¹⁴⁹Gd	¹⁴⁴Gd
65	¹⁵⁰Tb	¹⁴⁴Tb
66	¹⁵¹Dy	¹⁴⁴Dy
67	¹⁵²Ho	¹⁴⁴Ho
68	¹⁵³Er	¹⁴⁴Er
69	¹⁵⁴Tm	¹⁴⁴Tm
70	¹⁵⁵Yb
71	¹⁵⁶Lu
72	¹⁵⁷Hf
73	¹⁵⁸Ta
74	¹⁵⁹W
75	¹⁶⁰Re
76	¹⁶¹Os