Aluminium-35

Properties and data of the isotope ³⁵Al.

Content

General data

Name of the isotope:Aluminium-35; Al-35Symbol:³⁵Al or 3513AlMass number A:35 (= number of nucleons)Atomic number Z:13 (= number of protons)Neutrons N:22Isotopic mass:34.999760(8) u (atomic weight of Aluminium-35)Nuclide mass:34.9926285 u (calculated nuclear mass without electrons)Mass excess:-0.22356 MeVMass defect:0.292593568 u (per nucleus)Nuclear binding energy:272.54915303 MeV (per nucleus)
7.78711866 MeV (average binding energy per nucleon)Separation energy:S_N = 5.295(8) MeV (first neutron)
S_P = 15.84(3) MeV (first proton)Half-life:38.3(4) msDecay constant λ:18.097837612531 s^-1Specific activity α:3.205521393027 × 10⁺²³ Bq g^-1
8663571332505.9 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2+)Year of discovery:1979

Radioactive Decay

Half-life T_½ = 38.3(4) ms respectively 3.83 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	³⁵Si	62(2) %	14.14057 MeV
β^-, n	³⁴Si	38(2) %	11.6656 MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 22) and isobaric (same nucleon number A = 35) with Aluminium-35. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 22	Isobar A = 35
9	³¹F
10	³²Ne
11	³³Na	³⁵Na
12	³⁴Mg	³⁵Mg
13	³⁵Al	³⁵Al
14	³⁶Si	³⁵Si
15	³⁷P	³⁵P
16	³⁸S	³⁵S
17	³⁹Cl	³⁵Cl
18	⁴⁰Ar	³⁵Ar
19	⁴¹K	³⁵K
20	⁴²Ca	³⁵Ca
21	⁴³Sc
22	⁴⁴Ti
23	⁴⁵V
24	⁴⁶Cr
25	⁴⁷Mn
26	⁴⁸Fe
27	⁴⁹Co
28	⁵⁰Ni