Phosphorus-34

Properties and data of the isotope ³⁴P.

Content

General data

Name of the isotope:Phosphorus-34; P-34Symbol:³⁴P or 3415PMass number A:34 (= number of nucleons)Atomic number Z:15 (= number of protons)Neutrons N:19Isotopic mass:33.9736459(9) u (atomic weight of Phosphorus-34)Nuclide mass:33.9654173 u (calculated nuclear mass without electrons)Mass excess:-24.54869 MeVMass defect:0.308362984 u (per nucleus)Nuclear binding energy:287.23826942 MeV (per nucleus)
8.44818439 MeV (average binding energy per nucleon)Separation energy:S_N = 6.2827(14) MeV (first neutron)
S_P = 11.3233(11) MeV (first proton)Half-life:12.43(10) sDecay constant λ:0.055764053142393 s^-1Specific activity α:1.0176332816 × 10⁺²¹ Bq g^-1
27503602206.757 Ci g^-1Spin and parity:
(nuclear angular momentum)1+Mirror nucleus:Potassium-34Year of discovery:1945

Radioactive Decay

Half-life T_½ = 12.43(10) s respectively 1.243 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	³⁴S	100 %	5.3830(8) MeV

Parent Nuclides

Direct parent isotope is: ³⁴Si.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 19) and isobaric (same nucleon number A = 34) with Phosphorus-34. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 19	Isobar A = 34
8	²⁷O
9	²⁸F
10	²⁹Ne	³⁴Ne
11	³⁰Na	³⁴Na
12	³¹Mg	³⁴Mg
13	³²Al	³⁴Al
14	³³Si	³⁴Si
15	³⁴P	³⁴P
16	³⁵S	³⁴S
17	³⁶Cl	³⁴Cl
18	³⁷Ar	³⁴Ar
19	³⁸K	³⁴K
20	³⁹Ca	³⁴Ca
21	⁴⁰Sc
22	⁴¹Ti
23	⁴²V
24	⁴³Cr
25	⁴⁴Mn
26	⁴⁵Fe
27	⁴⁶Co