Chromium-59

Properties and data of the isotope ⁵⁹Cr.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Chromium-59; Cr-59Symbol:⁵⁹Cr or 5924CrMass number A:59 (= number of nucleons)Atomic number Z:24 (= number of protons)Neutrons N:35Isotopic mass:58.94838(23) u (atomic weight of Chromium-59)Nuclide mass:58.9352144 u (calculated nuclear mass without electrons)Mass excess:-48.08372 MeVMass defect:0.542692828 u (per nucleus)Nuclear binding energy:505.51511313 MeV (per nucleus)
8.56805276 MeV (average binding energy per nucleon)Separation energy:S_N = 4.17(22) MeV (first neutron)
S_P = 14.97(23) MeV (first proton)Half-life:0.74(28) sDecay constant λ:0.93668537913506 s^-1Specific activity α:9.725605680335 × 10⁺²¹ Bq g^-1
262854207576.64 Ci g^-1Spin and parity:
(nuclear angular momentum)(1/2-)Year of discovery:1980

Radioactive Decay

Half-life T_½ = 0.74(28) s respectively 7.4 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁵⁹Mn	100 %	7.44(22) MeV

Parent Nuclides

Direct parent isotope is: ⁵⁹V.

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
^59mCr	502.7(11) keV	96(20) μs	(9/2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 35) and isobaric (same nucleon number A = 59) with Chromium-59. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 35	Isobar A = 59
18	⁵³Ar
19	⁵⁴K
20	⁵⁵Ca
21	⁵⁶Sc	⁵⁹Sc
22	⁵⁷Ti	⁵⁹Ti
23	⁵⁸V	⁵⁹V
24	⁵⁹Cr	⁵⁹Cr
25	⁶⁰Mn	⁵⁹Mn
26	⁶¹Fe	⁵⁹Fe
27	⁶²Co	⁵⁹Co
28	⁶³Ni	⁵⁹Ni
29	⁶⁴Cu	⁵⁹Cu
30	⁶⁵Zn	⁵⁹Zn
31	⁶⁶Ga	⁵⁹Ga
32	⁶⁷Ge	⁵⁹Ge
33	⁶⁸As
34	⁶⁹Se
35	⁷⁰Br
36	⁷¹Kr
37	⁷²Rb
38	⁷³Sr