Molybdenum-87

Properties and data of the isotope ⁸⁷Mo.

Contents

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

General data

Name of the isotope:Molybdenum-87; Mo-87Symbol:⁸⁷Mo or 8742MoMass number A:87 (= number of nucleons)Atomic number Z:42 (= number of protons)Neutrons N:45Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.0714285714286 (= neutron-proton ratio)Neutron excess (N-Z):3Isotopic mass:86.928196(3) u (atomic weight of Molybdenum-87)Nuclide mass:86.9051567 u (calculated nuclear mass without electrons)Mass excess:-66.885 MeVMass defect:0.790376564 u (per nucleus)Nuclear binding energy:736.23102711 MeV (per nucleus)
8.4624256 MeV (average binding energy per nucleon)Separation energy:S_N = 10.846(5) MeV (first neutron)
S_P = 5.040(6) MeV (first proton)Half-life:14.1(3) sDecay constant λ:0.049159374507798 s^-1Specific activity α:3.442379975259 × 10⁺²⁰ Bq g^-1
9303729662.8643 Ci g^-1Spin and parity:
(nuclear angular momentum)(7/2+)Year of discovery:1977

Radioactive Decay

Half-life T_½ = 14.1(3) s respectively 1.41 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁸⁷Nb	85(8) %	6.990(7) MeV
ε, p	⁸⁶Zr	15(8) %

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 45) and isobaric (same nucleon number A = 87) with Molybdenum-87. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 45	Isobar A = 87
23	⁶⁸V
25	⁷⁰Mn
26	⁷¹Fe
27	⁷²Co
28	⁷³Ni
29	⁷⁴Cu
30	⁷⁵Zn
31	⁷⁶Ga	⁸⁷Ga
32	⁷⁷Ge	⁸⁷Ge
33	⁷⁸As	⁸⁷As
34	⁷⁹Se	⁸⁷Se
35	⁸⁰Br	⁸⁷Br
36	⁸¹Kr	⁸⁷Kr
37	⁸²Rb	⁸⁷Rb
38	⁸³Sr	⁸⁷Sr
39	⁸⁴Y	⁸⁷Y
40	⁸⁵Zr	⁸⁷Zr
41	⁸⁶Nb	⁸⁷Nb
42	⁸⁷Mo	⁸⁷Mo
43	⁸⁸Tc	⁸⁷Tc
44	⁸⁹Ru	⁸⁷Ru
45	⁹⁰Rh
46	⁹¹Pd
47	⁹²Ag