Zirconium-108

Properties and data of the isotope ¹⁰⁸Zr.

Content

General data

Name of the isotope:Zirconium-108; Zr-108Symbol:¹⁰⁸Zr or 10840ZrMass number A:108 (= number of nucleons)Atomic number Z:40 (= number of protons)Neutrons N:68Isotopic mass:107.94487(43) u (atomic weight of Zirconium-108)Nuclide mass:107.9229278 u (calculated nuclear mass without electrons)Mass excess:-51.35326 MeVMass defect:0.95734556800001 u (per nucleus)Nuclear binding energy:891.76165252 MeV (per nucleus)
8.25705234 MeV (average binding energy per nucleon)Separation energy:S_N = 5.04 MeV (first neutron)
S_P = 16.28(64) MeV (first proton)Half-life:77.4(22) msDecay constant λ:8.9553899297151 s^-1Specific activity α:5.040244823589 × 10⁺²² Bq g^-1
1362228330699.8 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1997

Radioactive Decay

Half-life T_½ = 77.4(22) ms respectively 7.74 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁰⁸Nb		8.19(40) MeV
β^-, n	¹⁰⁶Nb	?	4.30(40) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 68) and isobaric (same nucleon number A = 108) with Zirconium-108. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 68	Isobar A = 108
38	¹⁰⁶Sr
39	¹⁰⁷Y	¹⁰⁸Y
40	¹⁰⁸Zr	¹⁰⁸Zr
41	¹⁰⁹Nb	¹⁰⁸Nb
42	¹¹⁰Mo	¹⁰⁸Mo
43	¹¹¹Tc	¹⁰⁸Tc
44	¹¹²Ru	¹⁰⁸Ru
45	¹¹³Rh	¹⁰⁸Rh
46	¹¹⁴Pd	¹⁰⁸Pd
47	¹¹⁵Ag	¹⁰⁸Ag
48	¹¹⁶Cd	¹⁰⁸Cd
49	¹¹⁷In	¹⁰⁸In
50	¹¹⁸Sn	¹⁰⁸Sn
51	¹¹⁹Sb	¹⁰⁸Sb
52	¹²⁰Te	¹⁰⁸Te
53	¹²¹I	¹⁰⁸I
54	¹²²Xe
55	¹²³Cs
56	¹²⁴Ba
57	¹²⁵La
58	¹²⁶Ce
59	¹²⁷Pr
60	¹²⁸Nd
61	¹²⁹Pm
62	¹³⁰Sm
63	¹³¹Eu