Thulium-147m

Properties and data of the isotope ^147mTm.

Contents

General data

Name of the isotope:Thulium-147m; Tm-147mSymbol:^147mTm or 147m69TmMass number A:147 (= number of nucleons)Atomic number Z:69 (= number of protons)Neutrons N:78Isotopic mass:146.961380(7) u (atomic weight of Thulium-147m)
Excitation energy: 68(6) keVNuclide mass:146.9235314 u (calculated nuclear mass without electrons)Mass excess:-35.9743 MeVMass defect:1.254410656 u (per nucleus)Nuclear binding energy:1168.4759996 MeV (per nucleus)
7.94881632 MeV (average binding energy per nucleon)Half-life:0.36(4) msDecay constant λ:1925.4088348887 s^-1Specific activity α:7.941837819634 × 10⁺²⁴ Bq g^-1
2.146442653955 × 10⁺¹⁴ Ci g^-1Spin and parity:
(nuclear angular momentum)3/2+

Radioactive Decay

Half-life T_½ = 0.36(4) ms respectively 3.6 × 10^-4 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
p	¹⁴⁶Er	100 %

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
¹⁴⁷Tm		0.58(3) s	11/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 78) and isobaric (same nucleon number A = 147) with Thulium-147m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 78	Isobar A = 147
43	¹²¹Tc
44	¹²²Ru
45	¹²³Rh
46	¹²⁴Pd
47	¹²⁵Ag
48	¹²⁶Cd
49	¹²⁷In
50	¹²⁸Sn
51	¹²⁹Sb
52	¹³⁰Te
53	¹³¹I
54	¹³²Xe	¹⁴⁷Xe
55	¹³³Cs	¹⁴⁷Cs
56	¹³⁴Ba	¹⁴⁷Ba
57	¹³⁵La	¹⁴⁷La
58	¹³⁶Ce	¹⁴⁷Ce
59	¹³⁷Pr	¹⁴⁷Pr
60	¹³⁸Nd	¹⁴⁷Nd
61	¹³⁹Pm	¹⁴⁷Pm
62	¹⁴⁰Sm	¹⁴⁷Sm
63	¹⁴¹Eu	¹⁴⁷Eu
64	¹⁴²Gd	¹⁴⁷Gd
65	¹⁴³Tb	¹⁴⁷Tb
66	¹⁴⁴Dy	¹⁴⁷Dy
67	¹⁴⁵Ho	¹⁴⁷Ho
68	¹⁴⁶Er	¹⁴⁷Er
69	¹⁴⁷Tm	¹⁴⁷Tm
70	¹⁴⁸Yb
71	¹⁴⁹Lu