Tin-111m

Properties and data of the isotope ^111mSn.

Contents

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

General data

Name of the isotope:Tin-111m; Sn-111mSymbol:^111mSn or 111m50SnMass number A:111 (= number of nucleons)Atomic number Z:50 (= number of protons)Neutrons N:61Isotopic mass:110.907741(6) u (atomic weight of Tin-111m)
Excitation energy: 254.71(4) keVNuclide mass:110.8803136 u (calculated nuclear mass without electrons)Mass excess:-85.9387 MeVMass defect:1.012070476 u (per nucleus)Nuclear binding energy:942.73757597 MeV (per nucleus)
8.49313132 MeV (average binding energy per nucleon)Half-life:12.5(10) μsDecay constant λ:55451.774444796 s^-1Specific activity α:3.035803605818 × 10⁺²⁶ Bq g^-1
8.204874610319 × 10⁺¹⁵ Ci g^-1Spin and parity:
(nuclear angular momentum)1/2+

Radioactive Decay

Half-life T_½ = 12.5(10) μs respectively 1.25 × 10^-5 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹¹¹Sn	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
¹¹¹Sn		35.3(6) min	7/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 61) and isobaric (same nucleon number A = 111) with Tin-111m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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