Thulium-145

Properties and data of the isotope ¹⁴⁵Tm.

Contents

General data

Name of the isotope:Thulium-145; Tm-145Symbol:¹⁴⁵Tm or 14569TmMass number A:145 (= number of nucleons)Atomic number Z:69 (= number of protons)Neutrons N:76Isotopic mass:144.97039(21) u (atomic weight of Thulium-145)Nuclide mass:144.9325414 u (calculated nuclear mass without electrons)Mass excess:-27.58154 MeVMass defect:1.228070824 u (per nucleus)Nuclear binding energy:1143.94060413 MeV (per nucleus)
7.88924555 MeV (average binding energy per nucleon)Separation energy:S_N = 13.39(44) MeV (first neutron)Half-life:3.17(20) μsDecay constant λ:218658.41658042 s^-1Specific activity α:9.144387394847 × 10⁺²⁶ Bq g^-1
2.471456052661 × 10⁺¹⁶ Ci g^-1Spin and parity:
(nuclear angular momentum)(11/2-)Year of discovery:1998

Radioactive Decay

Half-life T_½ = 3.17(20) μs respectively 3.17 × 10^-6 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
p	¹⁴⁴Er	100 %

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 76) and isobaric (same nucleon number A = 145) with Thulium-145. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 76	Isobar A = 145
42	¹¹⁸Mo
43	¹¹⁹Tc
44	¹²⁰Ru
45	¹²¹Rh
46	¹²²Pd
47	¹²³Ag
48	¹²⁴Cd
49	¹²⁵In
50	¹²⁶Sn
51	¹²⁷Sb
52	¹²⁸Te
53	¹²⁹I	¹⁴⁵I
54	¹³⁰Xe	¹⁴⁵Xe
55	¹³¹Cs	¹⁴⁵Cs
56	¹³²Ba	¹⁴⁵Ba
57	¹³³La	¹⁴⁵La
58	¹³⁴Ce	¹⁴⁵Ce
59	¹³⁵Pr	¹⁴⁵Pr
60	¹³⁶Nd	¹⁴⁵Nd
61	¹³⁷Pm	¹⁴⁵Pm
62	¹³⁸Sm	¹⁴⁵Sm
63	¹³⁹Eu	¹⁴⁵Eu
64	¹⁴⁰Gd	¹⁴⁵Gd
65	¹⁴¹Tb	¹⁴⁵Tb
66	¹⁴²Dy	¹⁴⁵Dy
67	¹⁴³Ho	¹⁴⁵Ho
68	¹⁴⁴Er	¹⁴⁵Er
69	¹⁴⁵Tm	¹⁴⁵Tm