Nuclide reference

C-15 — Carbon-15

C-15 की half-life 2.449 s है। मुख्य decay mode: β⁻ decay → N-15 (100%)।

Identification

तत्व
Carbon (C)
Atomic number Z
6
Mass number A
15
State
Radioactive

Key quantities

Half-life
2.449 s
विशिष्ट गतिविधि
1.136e+22 Bq/g
Gamma constant Γ
—
D-value (НП-067-24)
—

Decay modes

  • β⁻ decay → N-15 — 100 %

Main gamma lines

Energy, keVYield, %
5,297.8263.2
8,310.150.032
9,046.780.031
7,298.920.0095
3,300.850.0084
6,322.350.0055
8,568.770.0043
3,013.470.0041
5,269.160.0037
1,011.750.0018

Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.

Alpha and beta particles

RadiationEnergy, keVYield, %
β⁻, E max4,472.963.2
9,771.736.8
1,459.10.041
721.990.034

For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.

Related calculators

Reference data vs computed valuesHalf-life, gamma lines and D-value are reference data (ENDF/B-VIII.0, НП-067-24).Gamma constant Γ 1 m पर H*(10) है, ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) से गणना की गई, equilibrium में short-lived progeny सहित (जैसे Cs-137/Ba-137m, Ra-226 series); specific activity molar mass M ≈ mass number A का उपयोग करती है।

Carbon-15 (C-15) — reference data

What is in the card

This card gathers the key data of radionuclide C-15 in one place: half-life, decay modes, main gamma lines, alpha and beta particle energies, gamma constant, specific activity and the D-value for source categorization. Decay and emission data are from ENDF/B-VIII.0; the D-value follows NP-067-24; the gamma constant is the ambient dose equivalent H*(10) at 1 m, computed from ICRP-107 spectra.

How to use the data

Half-life and specific activity let you recalculate the activity of a C-15 source to the delivery or disposal date — use the decay calculator. Gamma lines with yields identify the nuclide from a spectrum and pick the line for gamma spectrometry; the gamma constant Γ gives the dose rate at a distance, while the D-value and A1/A2 set the source category and the package type for transport.