Palladium-111

Properties and data of the isotope ¹¹¹Pd.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Palladium-111; Pd-111Symbol:¹¹¹Pd or 11146PdMass number A:111 (= number of nucleons)Atomic number Z:46 (= number of protons)Neutrons N:65Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.4130434782609 (= neutron-proton ratio)Neutron excess (N-Z):19Isotopic mass:110.9076903(8) u (atomic weight of Palladium-111)Nuclide mass:110.8824569 u (calculated nuclear mass without electrons)Mass excess:-85.98593 MeVMass defect:1.015480712 u (per nucleus)Nuclear binding energy:945.91419034 MeV (per nucleus)
8.52174946 MeV (average binding energy per nucleon)Separation energy:S_N = 5.7263(4) MeV (first neutron)
S_P = 10.446(18) MeV (first proton)Half-life:23.4(2) minDecay constant λ:0.00049369457304839 s^-1Specific activity α:2.702816600621 × 10⁺¹⁸ Bq g^-1
73049097.314097 Ci g^-1Spin and parity:
(nuclear angular momentum)5/2+Year of discovery:1937

Radioactive Decay

Half-life T_½ = 23.4(2) min (minutes) respectively 1.404 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹¹¹Ag	100 %	2.2296(16) MeV

Parent Nuclides

Direct parent isotope is: ¹¹¹Rh.

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
^111mPd	172.18(8) keV	5.5(1) h	11/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 65) and isobaric (same nucleon number A = 111) with Palladium-111. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 65	Isobar A = 111
36	¹⁰¹Kr
37	¹⁰²Rb
38	¹⁰³Sr
39	¹⁰⁴Y
40	¹⁰⁵Zr	¹¹¹Zr
41	¹⁰⁶Nb	¹¹¹Nb
42	¹⁰⁷Mo	¹¹¹Mo
43	¹⁰⁸Tc	¹¹¹Tc
44	¹⁰⁹Ru	¹¹¹Ru
45	¹¹⁰Rh	¹¹¹Rh
46	¹¹¹Pd	¹¹¹Pd
47	¹¹²Ag	¹¹¹Ag
48	¹¹³Cd	¹¹¹Cd
49	¹¹⁴In	¹¹¹In
50	¹¹⁵Sn	¹¹¹Sn
51	¹¹⁶Sb	¹¹¹Sb
52	¹¹⁷Te	¹¹¹Te
53	¹¹⁸I	¹¹¹I
54	¹¹⁹Xe	¹¹¹Xe
55	¹²⁰Cs
56	¹²¹Ba
57	¹²²La
58	¹²³Ce
59	¹²⁴Pr
60	¹²⁵Nd
61	¹²⁶Pm