Chromium-65

Properties and data of the isotope ⁶⁵Cr.

Content

General data

Name of the isotope:Chromium-65; Cr-65Symbol:⁶⁵Cr or 6524CrMass number A:65 (= number of nucleons)Atomic number Z:24 (= number of protons)Neutrons N:41Isotopic mass:64.96970(32) u (atomic weight of Chromium-65)Nuclide mass:64.9565344 u (calculated nuclear mass without electrons)Mass excess:-28.22427 MeVMass defect:0.573362324 u (per nucleus)Nuclear binding energy:534.08356463 MeV (per nucleus)
8.21667023 MeV (average binding energy per nucleon)Separation energy:S_N = 2.82(53) MeV (first neutron)
S_P = 19.19(50) MeV (first proton)Half-life:27(3) msDecay constant λ:25.672117798516 s^-1Specific activity α:2.415642336805 × 10⁺²³ Bq g^-1
6528763072447.6 Ci g^-1Spin and parity:
(nuclear angular momentum)(1/2-)Year of discovery:1997

Radioactive Decay

Half-life T_½ = 27(3) ms respectively 2.7 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶⁵Mn	100 %	12.75(39) MeV

Parent Nuclides

Direct parent isotope is: ⁶⁵V.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 41) and isobaric (same nucleon number A = 65) with Chromium-65. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 41	Isobar A = 65
22	⁶³Ti
23	⁶⁴V	⁶⁵V
24	⁶⁵Cr	⁶⁵Cr
25	⁶⁶Mn	⁶⁵Mn
26	⁶⁷Fe	⁶⁵Fe
27	⁶⁸Co	⁶⁵Co
28	⁶⁹Ni	⁶⁵Ni
29	⁷⁰Cu	⁶⁵Cu
30	⁷¹Zn	⁶⁵Zn
31	⁷²Ga	⁶⁵Ga
32	⁷³Ge	⁶⁵Ge
33	⁷⁴As	⁶⁵As
34	⁷⁵Se	⁶⁵Se
35	⁷⁶Br
36	⁷⁷Kr
37	⁷⁸Rb
38	⁷⁹Sr
39	⁸⁰Y
40	⁸¹Zr
41	⁸²Nb
42	⁸³Mo
44	⁸⁵Ru