Technetium-104m1

Properties and data of the isotope ^104m1Tc.

Contents

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

General data

Name of the isotope:Technetium-104m1; Tc-104m1Symbol:^104m1Tc or 104m143TcMass number A:104 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:61Isotopic mass:103.911429(27) u (atomic weight of Technetium-104m1)
Excitation energy: 69.7(2) keVNuclide mass:103.8878412 u (calculated nuclear mass without electrons)Mass excess:-82.50336 MeVMass defect:0.95360725200001 u (per nucleus)Nuclear binding energy:888.27943359 MeV (per nucleus)
8.5411484 MeV (average binding energy per nucleon)Half-life:3.5(3) μsDecay constant λ:198042.05158856 s^-1Specific activity α:1.157900127045 × 10⁺²⁷ Bq g^-1
3.129459802826 × 10⁺¹⁶ Ci g^-1Spin and parity:
(nuclear angular momentum)(+)

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
¹⁰⁴Tc		18.3(3) min	(3+)
^104m2Tc	106.1(3) keV	0.40(2) μs	(+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 61) and isobaric (same nucleon number A = 104) with Technetium-104m1. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 61	Isobar A = 104
34	⁹⁵Se
35	⁹⁶Br
36	⁹⁷Kr
37	⁹⁸Rb
38	⁹⁹Sr	¹⁰⁴Sr
39	¹⁰⁰Y	¹⁰⁴Y
40	¹⁰¹Zr	¹⁰⁴Zr
41	¹⁰²Nb	¹⁰⁴Nb
42	¹⁰³Mo	¹⁰⁴Mo
43	¹⁰⁴Tc	¹⁰⁴Tc
44	¹⁰⁵Ru	¹⁰⁴Ru
45	¹⁰⁶Rh	¹⁰⁴Rh
46	¹⁰⁷Pd	¹⁰⁴Pd
47	¹⁰⁸Ag	¹⁰⁴Ag
48	¹⁰⁹Cd	¹⁰⁴Cd
49	¹¹⁰In	¹⁰⁴In
50	¹¹¹Sn	¹⁰⁴Sn
51	¹¹²Sb	¹⁰⁴Sb
52	¹¹³Te
53	¹¹⁴I
54	¹¹⁵Xe
55	¹¹⁶Cs
56	¹¹⁷Ba
57	¹¹⁸La
58	¹¹⁹Ce