What kind of radiation does radium emit

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The decay chain of radium-226

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88-Ra-226

Radium-226

Half-life: 1600 years

Mode of decay: alpha to nucleus Rn-222

Decay energy: 4.871 MeV

Then γ-radiation of the Rn-222 at 186 keV possible

86-marginal number 222

Radon-222, noble gas

Half-life: 3.8235 days

Mode of decay: alpha to nucleus Po-218

Decay energy: 5.590 MeV

84-Po-218

Polonium-218

(Po-218 is historically also called Radium A)

Half-life: 3.10 minutes

Mode of decay: alpha to form the core Pb-214

Probability: 99.98%

Decay energy: 6.115 MeV

Mode of decay: beta to At-218 nucleus

Probability: 0.02%

Decay energy: 0.265 MeV

85-At-218

Astatine-218

Half-life: 1.5 seconds

Mode of decay: alpha to nucleus Bi-214

Probability: 99.90%

Decay energy: 6.874 MeV

Mode of decay: beta to nucleus Rn-218

Probability: 0.1%

Decay energy: 2.883 MeV

86-marginal number 218

Radon-218

Half-life: 35 milliseconds

Mode of decay: alpha to nucleus Po-214

Decay energy: 7.263 MeV

82-Pb-214

Lead-214

(Pb-214 is historically also called Radium B)

Half-life: 26.8 minutes

Mode of decay: beta to the nucleus Bi-214

Decay energy: 1.024 MeV

Then γ-radiation of the Bi-214 at 352 keV, 295 keV, 242 keV, 53 keV possible

83-Bi-214

Bismuth-214

(Bi-214 is historically also called Radium C)

Half-life: 19.9 minutes

Mode of decay: beta to nucleus Po-214

Probability: 99.98%

Decay energy: 3.272 MeV

Then γ-radiation of the Po-214 at 609 keV possible

Mode of decay: alpha to nucleus Tl-210

Probability: 0.02%

Decay energy: 5.617 MeV

84-Po-214

Polonium-214

(Po-214 is historically also called Radium C ')

Half-life: 164.3 µs

Type of disintegration: alpha to the core Pb-210

Decay energy: 7.833 MeV

81-Tl-210

Thallium-210

(Tl-210 is historically also called Radium C ")

Half-life: 1.3 minutes

Type of decay: beta to the core Pb-210

Decay energy: 5.484 MeV

82-Pb-210

Lead-210

(Pb-210 is historically also called Radium D)

Half-life: 22.3 years

Mode of decay: beta to the nucleus Bi-210

Decay energy: 0.064 MeV

Mode of decay: alpha to nucleus Hg-206

Probability: 1.9-6 %

Decay energy: 3.792 MeV

83-Bi-210

Bismuth-210

(Bi-210 is historically also called Radium E)

Half-life: 5.013 days

Mode of decay: beta to the core Po-210

Decay energy: 1.163 MeV

Mode of decay: alpha to nucleus Tl-206

Probability: 0.00013%

Decay energy: 5.037 MeV

84-Po-210

Polonium-210

(Po-210 is historically also called Radium F)

Half-life: 138.376 days

Mode of decay: alpha to the core Pb-206

Decay energy: 5.407 MeV

82-Pb-206

Lead-206

(Pb-206 is historically also called Radium G)

Pb-206 is the end product of the U238 decay chain, it is stable.

The entries come from the NUDAT database, see:

R.R. Kinsey, et al., The NUDAT / PCNUDAT Program for Nuclear Data, paper submitted to the 9th International Symposium of Capture-Gamma_ray Spectroscopy and Related Topics, Budapest, Hungary, Octover 1996. Data extracted from NUDAT database (Dec. 18, 1997).

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