Rhodium-94

Properties and data of the isotope ⁹⁴Rh.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Rhodium-94; Rh-94Symbol:⁹⁴Rh or 9445RhMass number A:94 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:49Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.0888888888889 (= neutron-proton ratio)Neutron excess (N-Z):4Isotopic mass:93.921730(4) u (atomic weight of Rhodium-94)Nuclide mass:93.8970452 u (calculated nuclear mass without electrons)Mass excess:-72.90804 MeVMass defect:0.854977324 u (per nucleus)Nuclear binding energy:796.40624744 MeV (per nucleus)
8.47240689 MeV (average binding energy per nucleon)Separation energy:S_N = 11.967(4) MeV (first neutron)
S_P = 2.980(4) MeV (first proton)Half-life:70.6(6) sDecay constant λ:0.0098179487331437 s^-1Specific activity α:6.357534432970 × 10⁺¹⁹ Bq g^-1
1718252549.4516 Ci g^-1Spin and parity:
(nuclear angular momentum)(4+)Year of discovery:1979

Radioactive Decay

Half-life T_½ = 70.6(6) s respectively 7.06 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁹⁴Ru	98.2(5) %	9.676(5) MeV
ε, p	⁹³Tc	1.8(5) %

Parent Nuclides

Direct parent isotopes are: ⁹⁴Pd, ⁹⁵Ag.

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
^94mRh	+x keV	25.8(2) s	(8+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 49) and isobaric (same nucleon number A = 94) with Rhodium-94. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 49	Isobar A = 94
27	⁷⁶Co
28	⁷⁷Ni
29	⁷⁸Cu
30	⁷⁹Zn
31	⁸⁰Ga
32	⁸¹Ge
33	⁸²As
34	⁸³Se	⁹⁴Se
35	⁸⁴Br	⁹⁴Br
36	⁸⁵Kr	⁹⁴Kr
37	⁸⁶Rb	⁹⁴Rb
38	⁸⁷Sr	⁹⁴Sr
39	⁸⁸Y	⁹⁴Y
40	⁸⁹Zr	⁹⁴Zr
41	⁹⁰Nb	⁹⁴Nb
42	⁹¹Mo	⁹⁴Mo
43	⁹²Tc	⁹⁴Tc
44	⁹³Ru	⁹⁴Ru
45	⁹⁴Rh	⁹⁴Rh
46	⁹⁵Pd	⁹⁴Pd
47	⁹⁶Ag	⁹⁴Ag
48	⁹⁷Cd	⁹⁴Cd
49	⁹⁸In
50	⁹⁹Sn