Chromium-64

Properties and data of the isotope ⁶⁴Cr.

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-64; Cr-64Symbol:⁶⁴Cr or 6424CrMass number A:64 (= number of nucleons)Atomic number Z:24 (= number of protons)Neutrons N:40Isotopic mass:63.96406(47) u (atomic weight of Chromium-64)Nuclide mass:63.9508944 u (calculated nuclear mass without electrons)Mass excess:-33.47789 MeVMass defect:0.570337408 u (per nucleus)Nuclear binding energy:531.26587353 MeV (per nucleus)
8.30102927 MeV (average binding energy per nucleon)Separation energy:S_N = 5.54(57) MeV (first neutron)
S_P = 18.88(59) MeV (first proton)Half-life:43(1) msDecay constant λ:16.119701873487 s^-1Specific activity α:1.540874846068 × 10⁺²³ Bq g^-1
4164526610996.5 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1992

Radioactive Decay

Half-life T_½ = 43(1) ms respectively 4.3 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶⁴Mn	100 %	9.51(44) MeV
β^-, n	⁶³Mn	?	5.34(44) MeV

Parent Nuclides

Direct parent isotope is: ⁶⁴V.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 40) and isobaric (same nucleon number A = 64) with Chromium-64. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 40	Isobar A = 64
21	⁶¹Sc
22	⁶²Ti	⁶⁴Ti
23	⁶³V	⁶⁴V
24	⁶⁴Cr	⁶⁴Cr
25	⁶⁵Mn	⁶⁴Mn
26	⁶⁶Fe	⁶⁴Fe
27	⁶⁷Co	⁶⁴Co
28	⁶⁸Ni	⁶⁴Ni
29	⁶⁹Cu	⁶⁴Cu
30	⁷⁰Zn	⁶⁴Zn
31	⁷¹Ga	⁶⁴Ga
32	⁷²Ge	⁶⁴Ge
33	⁷³As	⁶⁴As
34	⁷⁴Se	⁶⁴Se
35	⁷⁵Br
36	⁷⁶Kr
37	⁷⁷Rb
38	⁷⁸Sr
39	⁷⁹Y
40	⁸⁰Zr
41	⁸¹Nb
42	⁸²Mo