Nuclide reference

Cs-132 — Caesium-132

Cs-132 की half-life 6.48 d है। मुख्य decay mode: β⁺ decay / electron capture → Xe-132 (98.13%)।

Identification

तत्व
Caesium (Cs)
Atomic number Z
55
Mass number A
132
State
Radioactive

Key quantities

Half-life
6.48 d
विशिष्ट गतिविधि
5.648e+15 Bq/g
Gamma constant Γ
—
परिवहन के लिए A1 / A2 (SSR-6)
1 TBq / 1 TBq
D-value (НП-067-24)
0.1 TBq

Decay modes

  • β⁺ decay / electron capture → Xe-132 — 98.13 %
  • β⁻ decay → Ba-132 — 1.87 %

Main gamma lines

Energy, keVYield, %
667.71497.59
29.778 · X-ray line39.75
29.458 · X-ray line21.43
464.4661.58
630.190.9467
510.999 · annihilation 511 keV0.814
505.790.732
1,317.920.5856
1,1360.4763
567.160.2233

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

Alpha and beta particles

RadiationEnergy, keVYield, %
β⁻, E max814.41.51
247.240.36
β⁺, E max434.890.407

For β⁻ and 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।K-series X-ray energies are from NIST SRD 128 (Deslattes et al., 2003): in ENDF/B-VIII.0 they are given to 1 % and shifted by up to 0.7 keV for heavy elements. L-series lines and all yields are ENDF/B-VIII.0.

Caesium-132 (Cs-132) — reference data

What is in the card

This card gathers the key data of radionuclide Cs-132 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 Cs-132 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.