Phosphorus-36

Properties and data of the isotope ³⁶P.

Content

General data

Name of the isotope:Phosphorus-36; P-36Symbol:³⁶P or 3615PMass number A:36 (= number of nucleons)Atomic number Z:15 (= number of protons)Neutrons N:21Isotopic mass:35.978260(14) u (atomic weight of Phosphorus-36)Nuclide mass:35.9700314 u (calculated nuclear mass without electrons)Mass excess:-20.25068 MeVMass defect:0.321078716 u (per nucleus)Nuclear binding energy:299.08289748 MeV (per nucleus)
8.30785826 MeV (average binding energy per nucleon)Separation energy:S_N = 3.465(13) MeV (first neutron)
S_P = 13.149(38) MeV (first proton)Half-life:5.6(3) sDecay constant λ:0.12377628224285 s^-1Specific activity α:2.129709162244 × 10⁺²¹ Bq g^-1
57559707087.7 Ci g^-1Spin and parity:
(nuclear angular momentum)4-Mirror nucleus:Scandium-36Year of discovery:1971

Radioactive Decay

Half-life T_½ = 5.6(3) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	³⁶S	100 %	10.413(13) MeV

Parent Nuclides

Direct parent isotopes are: ³⁶Si, ³⁷Si.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 21) and isobaric (same nucleon number A = 36) with Phosphorus-36. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 21	Isobar A = 36
9	³⁰F
10	³¹Ne
11	³²Na	³⁶Na
12	³³Mg	³⁶Mg
13	³⁴Al	³⁶Al
14	³⁵Si	³⁶Si
15	³⁶P	³⁶P
16	³⁷S	³⁶S
17	³⁸Cl	³⁶Cl
18	³⁹Ar	³⁶Ar
19	⁴⁰K	³⁶K
20	⁴¹Ca	³⁶Ca
21	⁴²Sc	³⁶Sc
22	⁴³Ti
23	⁴⁴V
24	⁴⁵Cr
25	⁴⁶Mn
26	⁴⁷Fe
27	⁴⁸Co
28	⁴⁹Ni