Radioactive Isotopes and Their Half-Lives - YAML

- code: "001"
  slug: "tellurium-128"
  name: "Tellurium-128"
  symbol: "Te-128"
  atomicNumber: 52
  massNumber: 128
  halfLife:
    value: 2.2
    unit: "×10²⁴ years"
    seconds: 6.94e+31
  decayMode: "double beta decay"
  category: "naturally-occurring"
  description: "The radioactive isotope with the longest known half-life."
- code: "002"
  slug: "xenon-136"
  name: "Xenon-136"
  symbol: "Xe-136"
  atomicNumber: 54
  massNumber: 136
  halfLife:
    value: 2.38
    unit: "×10²¹ years"
    seconds: 7.51e+28
  decayMode: "double beta decay"
  category: "naturally-occurring"
  description: "A noble gas isotope that undergoes double beta decay."
- code: "003"
  slug: "thorium-232"
  name: "Thorium-232"
  symbol: "Th-232"
  atomicNumber: 90
  massNumber: 232
  halfLife:
    value: 1.41
    unit: "×10¹⁰ years"
    seconds: 445000000000000000
  decayMode: "alpha decay"
  category: "naturally-occurring"
  description: "The parent nuclide of the thorium series, abundantly present on Earth."
- code: "004"
  slug: "uranium-238"
  name: "Uranium-238"
  symbol: "U-238"
  atomicNumber: 92
  massNumber: 238
  halfLife:
    value: 4.47
    unit: "×10⁹ years"
    seconds: 141000000000000000
  decayMode: "alpha decay"
  category: "naturally-occurring"
  description: "The main component of natural uranium and parent nuclide of the uranium series."
- code: "005"
  slug: "potassium-40"
  name: "Potassium-40"
  symbol: "K-40"
  atomicNumber: 19
  massNumber: 40
  halfLife:
    value: 1.26
    unit: "×10⁹ years"
    seconds: 39800000000000000
  decayMode: "beta decay / electron capture"
  category: "naturally-occurring"
  description: "A radioactive isotope of potassium widely used for rock dating."
- code: "006"
  slug: "uranium-235"
  name: "Uranium-235"
  symbol: "U-235"
  atomicNumber: 92
  massNumber: 235
  halfLife:
    value: 7.04
    unit: "×10⁸ years"
    seconds: 22200000000000000
  decayMode: "alpha decay"
  category: "naturally-occurring"
  description: "Fissile material and the primary fuel for nuclear power generation."
- code: "007"
  slug: "plutonium-244"
  name: "Plutonium-244"
  symbol: "Pu-244"
  atomicNumber: 94
  massNumber: 244
  halfLife:
    value: 8.26
    unit: "×10⁷ years"
    seconds: 2610000000000000
  decayMode: "alpha decay"
  category: "transuranic"
  description: "The plutonium isotope with the longest half-life."
- code: "008"
  slug: "iodine-129"
  name: "Iodine-129"
  symbol: "I-129"
  atomicNumber: 53
  massNumber: 129
  halfLife:
    value: 1.57
    unit: "×10⁷ years"
    seconds: 495000000000000
  decayMode: "beta decay"
  category: "fission-product"
  description: "A long-lived fission product used for geological dating."
- code: "009"
  slug: "aluminum-26"
  name: "Aluminum-26"
  symbol: "Al-26"
  atomicNumber: 13
  massNumber: 26
  halfLife:
    value: 7.17
    unit: "×10⁵ years"
    seconds: 22600000000000
  decayMode: "beta decay / electron capture"
  category: "cosmogenic"
  description: "Produced by cosmic rays and used for meteorite dating."
- code: "010"
  slug: "carbon-14"
  name: "Carbon-14"
  symbol: "C-14"
  atomicNumber: 6
  massNumber: 14
  halfLife:
    value: 5730
    unit: "years"
    seconds: 181000000000
  decayMode: "beta decay"
  category: "cosmogenic"
  description: "The most famous isotope that forms the basis of radiocarbon dating."
- code: "011"
  slug: "plutonium-239"
  name: "Plutonium-239"
  symbol: "Pu-239"
  atomicNumber: 94
  massNumber: 239
  halfLife:
    value: 24100
    unit: "years"
    seconds: 761000000000
  decayMode: "alpha decay"
  category: "transuranic"
  description: "Fissile material used in both nuclear power and weapons."
- code: "012"
  slug: "americium-241"
  name: "Americium-241"
  symbol: "Am-241"
  atomicNumber: 95
  massNumber: 241
  halfLife:
    value: 432.2
    unit: "years"
    seconds: 13600000000
  decayMode: "alpha decay"
  category: "transuranic"
  description: "An artificial radioactive element widely used in smoke detectors."
- code: "013"
  slug: "radium-226"
  name: "Radium-226"
  symbol: "Ra-226"
  atomicNumber: 88
  massNumber: 226
  halfLife:
    value: 1600
    unit: "years"
    seconds: 50500000000
  decayMode: "alpha decay"
  category: "naturally-occurring"
  description: "A famous radioactive element discovered by Marie Curie, once used in medicine."
- code: "014"
  slug: "cesium-137"
  name: "Cesium-137"
  symbol: "Cs-137"
  atomicNumber: 55
  massNumber: 137
  halfLife:
    value: 30.17
    unit: "years"
    seconds: 952000000
  decayMode: "beta decay"
  category: "fission-product"
  description: "A fission product used in medicine and industry, but also a concern for environmental contamination."
- code: "015"
  slug: "strontium-90"
  name: "Strontium-90"
  symbol: "Sr-90"
  atomicNumber: 38
  massNumber: 90
  halfLife:
    value: 28.8
    unit: "years"
    seconds: 909000000
  decayMode: "beta decay"
  category: "fission-product"
  description: "A fission product that easily accumulates in bones, important for environmental monitoring."
- code: "016"
  slug: "tritium"
  name: "Tritium"
  symbol: "H-3"
  atomicNumber: 1
  massNumber: 3
  halfLife:
    value: 12.3
    unit: "years"
    seconds: 388000000
  decayMode: "beta decay"
  category: "cosmogenic"
  description: "A radioactive isotope of hydrogen used in fusion research and luminous watch dials."
- code: "017"
  slug: "cobalt-60"
  name: "Cobalt-60"
  symbol: "Co-60"
  atomicNumber: 27
  massNumber: 60
  halfLife:
    value: 5.27
    unit: "years"
    seconds: 166000000
  decayMode: "beta decay"
  category: "artificial"
  description: "An artificial radioactive isotope widely used as a radiation source for cancer treatment."
- code: "018"
  slug: "iridium-192"
  name: "Iridium-192"
  symbol: "Ir-192"
  atomicNumber: 77
  massNumber: 192
  halfLife:
    value: 73.8
    unit: "days"
    seconds: 6380000
  decayMode: "beta decay"
  category: "artificial"
  description: "A gamma source widely used for industrial radiographic testing."
- code: "019"
  slug: "iodine-131"
  name: "Iodine-131"
  symbol: "I-131"
  atomicNumber: 53
  massNumber: 131
  halfLife:
    value: 8.04
    unit: "days"
    seconds: 695000
  decayMode: "beta decay"
  category: "fission-product"
  description: "A nuclear medicine radioisotope used for thyroid diagnosis and treatment."
- code: "020"
  slug: "molybdenum-99"
  name: "Molybdenum-99"
  symbol: "Mo-99"
  atomicNumber: 42
  massNumber: 99
  halfLife:
    value: 65.9
    unit: "hours"
    seconds: 237000
  decayMode: "beta decay"
  category: "fission-product"
  description: "The parent nuclide of Technetium-99m, forming the foundation of nuclear medicine diagnostics."
- code: "021"
  slug: "technetium-99m"
  name: "Technetium-99m"
  symbol: "Tc-99m"
  atomicNumber: 43
  massNumber: 99
  halfLife:
    value: 6.01
    unit: "hours"
    seconds: 21600
  decayMode: "isomeric transition"
  category: "artificial"
  description: "The most widely used radioisotope in nuclear medicine diagnostics."
- code: "022"
  slug: "fluorine-18"
  name: "Fluorine-18"
  symbol: "F-18"
  atomicNumber: 9
  massNumber: 18
  halfLife:
    value: 109.8
    unit: "minutes"
    seconds: 6588
  decayMode: "positron emission"
  category: "artificial"
  description: "A positron-emitting nuclide used in PET scans."
- code: "023"
  slug: "radon-222"
  name: "Radon-222"
  symbol: "Rn-222"
  atomicNumber: 86
  massNumber: 222
  halfLife:
    value: 3.82
    unit: "days"
    seconds: 330000
  decayMode: "alpha decay"
  category: "naturally-occurring"
  description: "A naturally occurring radioactive gas that causes indoor air pollution."
- code: "024"
  slug: "polonium-210"
  name: "Polonium-210"
  symbol: "Po-210"
  atomicNumber: 84
  massNumber: 210
  halfLife:
    value: 138.4
    unit: "days"
    seconds: 12000000
  decayMode: "alpha decay"
  category: "naturally-occurring"
  description: "Emits strong alpha radiation and was once used in static eliminators."
- code: "025"
  slug: "bismuth-213"
  name: "Bismuth-213"
  symbol: "Bi-213"
  atomicNumber: 83
  massNumber: 213
  halfLife:
    value: 45.6
    unit: "minutes"
    seconds: 2736
  decayMode: "beta decay / alpha decay"
  category: "artificial"
  description: "An alpha source used in targeted alpha therapy for cancer treatment."
- code: "026"
  slug: "actinium-225"
  name: "Actinium-225"
  symbol: "Ac-225"
  atomicNumber: 89
  massNumber: 225
  halfLife:
    value: 9.9
    unit: "days"
    seconds: 855000
  decayMode: "alpha decay"
  category: "artificial"
  description: "A promising radioisotope used in targeted alpha therapy."
- code: "027"
  slug: "lutetium-177"
  name: "Lutetium-177"
  symbol: "Lu-177"
  atomicNumber: 71
  massNumber: 177
  halfLife:
    value: 6.65
    unit: "days"
    seconds: 575000
  decayMode: "beta decay"
  category: "artificial"
  description: "A beta source used for treating neuroendocrine tumors."
- code: "028"
  slug: "yttrium-90"
  name: "Yttrium-90"
  symbol: "Y-90"
  atomicNumber: 39
  massNumber: 90
  halfLife:
    value: 64.1
    unit: "hours"
    seconds: 231000
  decayMode: "beta decay"
  category: "fission-product"
  description: "A beta source used for liver cancer treatment (SIRT)."
- code: "029"
  slug: "phosphorus-32"
  name: "Phosphorus-32"
  symbol: "P-32"
  atomicNumber: 15
  massNumber: 32
  halfLife:
    value: 14.3
    unit: "days"
    seconds: 1240000
  decayMode: "beta decay"
  category: "artificial"
  description: "Used for malignant tumor treatment and biological research."
- code: "030"
  slug: "sodium-24"
  name: "Sodium-24"
  symbol: "Na-24"
  atomicNumber: 11
  massNumber: 24
  halfLife:
    value: 15
    unit: "hours"
    seconds: 54000
  decayMode: "beta decay"
  category: "artificial"
  description: "Used for blood flow measurement and industrial flow measurement."
- code: "031"
  slug: "gallium-68"
  name: "Gallium-68"
  symbol: "Ga-68"
  atomicNumber: 31
  massNumber: 68
  halfLife:
    value: 68
    unit: "minutes"
    seconds: 4080
  decayMode: "positron emission"
  category: "artificial"
  description: "A positron-emitting nuclide used in PET scans."
- code: "032"
  slug: "copper-64"
  name: "Copper-64"
  symbol: "Cu-64"
  atomicNumber: 29
  massNumber: 64
  halfLife:
    value: 12.7
    unit: "hours"
    seconds: 45720
  decayMode: "beta decay / positron emission / electron capture"
  category: "artificial"
  description: "A versatile nuclide used for both PET imaging and radionuclide therapy."
- code: "033"
  slug: "astatine-211"
  name: "Astatine-211"
  symbol: "At-211"
  atomicNumber: 85
  massNumber: 211
  halfLife:
    value: 7.2
    unit: "hours"
    seconds: 25920
  decayMode: "alpha decay / electron capture"
  category: "artificial"
  description: "A rare halogen element used in targeted alpha therapy."
- code: "034"
  slug: "lead-212"
  name: "Lead-212"
  symbol: "Pb-212"
  atomicNumber: 82
  massNumber: 212
  halfLife:
    value: 10.6
    unit: "hours"
    seconds: 38160
  decayMode: "beta decay"
  category: "naturally-occurring"
  description: "An intermediate nuclide of the thorium series used in targeted radionuclide therapy."
- code: "035"
  slug: "thorium-229"
  name: "Thorium-229"
  symbol: "Th-229"
  atomicNumber: 90
  massNumber: 229
  halfLife:
    value: 7340
    unit: "years"
    seconds: 232000000000
  decayMode: "alpha decay"
  category: "naturally-occurring"
  description: "A thorium isotope used in nuclear clock research."
- code: "036"
  slug: "protactinium-231"
  name: "Protactinium-231"
  symbol: "Pa-231"
  atomicNumber: 91
  massNumber: 231
  halfLife:
    value: 32760
    unit: "years"
    seconds: 1030000000000
  decayMode: "alpha decay"
  category: "naturally-occurring"
  description: "A long-lived radionuclide used for dating ocean circulation."
- code: "037"
  slug: "neptunium-237"
  name: "Neptunium-237"
  symbol: "Np-237"
  atomicNumber: 93
  massNumber: 237
  halfLife:
    value: 2.14
    unit: "×10⁶ years"
    seconds: 67500000000000
  decayMode: "alpha decay"
  category: "transuranic"
  description: "The parent nuclide of the neptunium series, present in spent nuclear fuel."
- code: "038"
  slug: "curium-247"
  name: "Curium-247"
  symbol: "Cm-247"
  atomicNumber: 96
  massNumber: 247
  halfLife:
    value: 1.56
    unit: "×10⁷ years"
    seconds: 492000000000000
  decayMode: "alpha decay"
  category: "transuranic"
  description: "The curium isotope with the longest half-life."
- code: "039"
  slug: "einsteinium-252"
  name: "Einsteinium-252"
  symbol: "Es-252"
  atomicNumber: 99
  massNumber: 252
  halfLife:
    value: 471.7
    unit: "days"
    seconds: 40800000
  decayMode: "alpha decay"
  category: "transuranic"
  description: "The einsteinium isotope with the longest half-life."
- code: "040"
  slug: "californium-251"
  name: "Californium-251"
  symbol: "Cf-251"
  atomicNumber: 98
  massNumber: 251
  halfLife:
    value: 898
    unit: "years"
    seconds: 28300000000
  decayMode: "alpha decay"
  category: "transuranic"
  description: "The californium isotope with the longest half-life."