Terbium-145

Properties and data of the isotope ¹⁴⁵Tb.

Content

General data

Name of the isotope:Terbium-145; Tb-145Symbol:¹⁴⁵Tb or 14565TbMass number A:145 (= number of nucleons)Atomic number Z:65 (= number of protons)Neutrons N:80Isotopic mass:144.92873(12) u (atomic weight of Terbium-145)Nuclide mass:144.8930753 u (calculated nuclear mass without electrons)Mass excess:-66.38758 MeVMass defect:1.27309036 u (per nucleus)Nuclear binding energy:1185.8760318 MeV (per nucleus)
8.17845539 MeV (average binding energy per nucleon)Separation energy:S_N = 12.09(11) MeV (first neutron)
S_P = 1.92(11) MeV (first proton)Half-life:Spin and parity:
(nuclear angular momentum)(3/2+)Year of discovery:1981

Parent Nuclides

Direct parent isotope is: ¹⁴⁵Dy.

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
^145mTb		30.9(6) s	(11/2-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 80) and isobaric (same nucleon number A = 145) with Terbium-145. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 80	Isobar A = 145
44	¹²⁴Ru
45	¹²⁵Rh
46	¹²⁶Pd
47	¹²⁷Ag
48	¹²⁸Cd
49	¹²⁹In
50	¹³⁰Sn
51	¹³¹Sb
52	¹³²Te
53	¹³³I	¹⁴⁵I
54	¹³⁴Xe	¹⁴⁵Xe
55	¹³⁵Cs	¹⁴⁵Cs
56	¹³⁶Ba	¹⁴⁵Ba
57	¹³⁷La	¹⁴⁵La
58	¹³⁸Ce	¹⁴⁵Ce
59	¹³⁹Pr	¹⁴⁵Pr
60	¹⁴⁰Nd	¹⁴⁵Nd
61	¹⁴¹Pm	¹⁴⁵Pm
62	¹⁴²Sm	¹⁴⁵Sm
63	¹⁴³Eu	¹⁴⁵Eu
64	¹⁴⁴Gd	¹⁴⁵Gd
65	¹⁴⁵Tb	¹⁴⁵Tb
66	¹⁴⁶Dy	¹⁴⁵Dy
67	¹⁴⁷Ho	¹⁴⁵Ho
68	¹⁴⁸Er	¹⁴⁵Er
69	¹⁴⁹Tm	¹⁴⁵Tm
70	¹⁵⁰Yb
71	¹⁵¹Lu