Rubidium-80

Properties and data of the isotope ⁸⁰Rb.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Rubidium-80; Rb-80Symbol:⁸⁰Rb or 8037RbMass number A:80 (= number of nucleons)Atomic number Z:37 (= number of protons)Neutrons N:43Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.1621621621622 (= neutron-proton ratio)Neutron excess (N-Z):6Isotopic mass:79.9225164(20) u (atomic weight of Rubidium-80)Nuclide mass:79.9022197 u (calculated nuclear mass without electrons)Mass excess:-72.17551 MeVMass defect:0.73960117199999 u (per nucleus)Nuclear binding energy:688.93405411 MeV (per nucleus)
8.61167568 MeV (average binding energy per nucleon)Separation energy:S_N = 9.4438(28) MeV (first neutron)
S_P = 5.022(4) MeV (first proton)Half-life:33.4(7) sDecay constant λ:0.020752909597603 s^-1Specific activity α:1.581986643674 × 10⁺²⁰ Bq g^-1
4275639577.4992 Ci g^-1Spin and parity:
(nuclear angular momentum)1+Magnetic dipole moment:μ(μ_N) = - 0.0836(6)Quadrupole moment Q:+ 0.348(20) barn (100 fm²)Nuclear g-factor:g_l = -0.0836Charge radius:4.2271(61) femtometer fmYear of discovery:1961

Radioactive Decay

Half-life T_½ = 33.4(7) s respectively 3.34 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁸⁰Kr	100 %	5.7179(20) MeV

Parent Nuclides

Direct parent isotope is: ⁸⁰Sr.

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
^80mRb	493.9(5) keV	1.63(4) μs	(6+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 43) and isobaric (same nucleon number A = 80) with Rubidium-80. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 43	Isobar A = 80
22	⁶⁵Ti
23	⁶⁶V
24	⁶⁷Cr
25	⁶⁸Mn
26	⁶⁹Fe
27	⁷⁰Co
28	⁷¹Ni	⁸⁰Ni
29	⁷²Cu	⁸⁰Cu
30	⁷³Zn	⁸⁰Zn
31	⁷⁴Ga	⁸⁰Ga
32	⁷⁵Ge	⁸⁰Ge
33	⁷⁶As	⁸⁰As
34	⁷⁷Se	⁸⁰Se
35	⁷⁸Br	⁸⁰Br
36	⁷⁹Kr	⁸⁰Kr
37	⁸⁰Rb	⁸⁰Rb
38	⁸¹Sr	⁸⁰Sr
39	⁸²Y	⁸⁰Y
40	⁸³Zr	⁸⁰Zr
41	⁸⁴Nb
42	⁸⁵Mo
43	⁸⁶Tc
44	⁸⁷Ru