放射性同位体とその半減期 - TOML

[[items]]
code = "001"
slug = "tellurium-128"
name = "テルル-128"
description = "現在知られている中で最も長い半減期を持つ放射性同位体です。"
atomicNumber = 52
category = "naturally-occurring"
decayMode = "double beta decay"
halfLife_seconds = 6.94e+31
halfLife_unit = "×10²⁴ years"
halfLife_value = 2.2
massNumber = 128
symbol = "Te-128"

[[items]]
code = "002"
slug = "xenon-136"
name = "キセノン-136"
description = "二重ベータ崩壊を起こす希ガス元素の同位体です。"
atomicNumber = 54
category = "naturally-occurring"
decayMode = "double beta decay"
halfLife_seconds = 7.51e+28
halfLife_unit = "×10²¹ years"
halfLife_value = 2.38
massNumber = 136
symbol = "Xe-136"

[[items]]
code = "003"
slug = "thorium-232"
name = "トリウム-232"
description = "トリウム系列の親核種であり、地球に豊富に存在する放射性元素です。"
atomicNumber = 90
category = "naturally-occurring"
decayMode = "alpha decay"
halfLife_seconds = 445000000000000000
halfLife_unit = "×10¹⁰ years"
halfLife_value = 1.41
massNumber = 232
symbol = "Th-232"

[[items]]
code = "004"
slug = "uranium-238"
name = "ウラン-238"
description = "天然ウランの主要構成成分であり、ウラン系列の親核種です。"
atomicNumber = 92
category = "naturally-occurring"
decayMode = "alpha decay"
halfLife_seconds = 141000000000000000
halfLife_unit = "×10⁹ years"
halfLife_value = 4.47
massNumber = 238
symbol = "U-238"

[[items]]
code = "005"
slug = "potassium-40"
name = "カリウム-40"
description = "カリウムの放射性同位体で、岩石年代測定に広く利用されます。"
atomicNumber = 19
category = "naturally-occurring"
decayMode = "beta decay / electron capture"
halfLife_seconds = 39800000000000000
halfLife_unit = "×10⁹ years"
halfLife_value = 1.26
massNumber = 40
symbol = "K-40"

[[items]]
code = "006"
slug = "uranium-235"
name = "ウラン-235"
description = "核分裂性を持ち、原子力発電の主要燃料です。"
atomicNumber = 92
category = "naturally-occurring"
decayMode = "alpha decay"
halfLife_seconds = 22200000000000000
halfLife_unit = "×10⁸ years"
halfLife_value = 7.04
massNumber = 235
symbol = "U-235"

[[items]]
code = "007"
slug = "plutonium-244"
name = "プルトニウム-244"
description = "最も長い半減期を持つプルトニウムの同位体です。"
atomicNumber = 94
category = "transuranic"
decayMode = "alpha decay"
halfLife_seconds = 2610000000000000
halfLife_unit = "×10⁷ years"
halfLife_value = 8.26
massNumber = 244
symbol = "Pu-244"

[[items]]
code = "008"
slug = "iodine-129"
name = "ヨウ素-129"
description = "長寿命核分裂生成物で、地質学的年代測定に利用されます。"
atomicNumber = 53
category = "fission-product"
decayMode = "beta decay"
halfLife_seconds = 495000000000000
halfLife_unit = "×10⁷ years"
halfLife_value = 1.57
massNumber = 129
symbol = "I-129"

[[items]]
code = "009"
slug = "aluminum-26"
name = "アルミニウム-26"
description = "宇宙線によって生成され、隕石年代測定に利用されます。"
atomicNumber = 13
category = "cosmogenic"
decayMode = "beta decay / electron capture"
halfLife_seconds = 22600000000000
halfLife_unit = "×10⁵ years"
halfLife_value = 7.17
massNumber = 26
symbol = "Al-26"

[[items]]
code = "010"
slug = "carbon-14"
name = "炭素-14"
description = "放射性炭素年代測定法の基礎となる最も有名な同位体です。"
atomicNumber = 6
category = "cosmogenic"
decayMode = "beta decay"
halfLife_seconds = 181000000000
halfLife_unit = "years"
halfLife_value = 5730
massNumber = 14
symbol = "C-14"

[[items]]
code = "011"
slug = "plutonium-239"
name = "プルトニウム-239"
description = "核分裂性を持ち、原子力発電と核兵器の両方に使用されます。"
atomicNumber = 94
category = "transuranic"
decayMode = "alpha decay"
halfLife_seconds = 761000000000
halfLife_unit = "years"
halfLife_value = 24100
massNumber = 239
symbol = "Pu-239"

[[items]]
code = "012"
slug = "americium-241"
name = "アメリシウム-241"
description = "煙感知器に広く使用される人工放射性元素です。"
atomicNumber = 95
category = "transuranic"
decayMode = "alpha decay"
halfLife_seconds = 13600000000
halfLife_unit = "years"
halfLife_value = 432.2
massNumber = 241
symbol = "Am-241"

[[items]]
code = "013"
slug = "radium-226"
name = "ラジウム-226"
description = "キュリー夫人によって発見され、かつて医療に使用された有名な放射性元素です。"
atomicNumber = 88
category = "naturally-occurring"
decayMode = "alpha decay"
halfLife_seconds = 50500000000
halfLife_unit = "years"
halfLife_value = 1600
massNumber = 226
symbol = "Ra-226"

[[items]]
code = "014"
slug = "cesium-137"
name = "セシウム-137"
description = "核分裂生成物で、医療と工業に利用されると同時に環境汚染の懸念もあります。"
atomicNumber = 55
category = "fission-product"
decayMode = "beta decay"
halfLife_seconds = 952000000
halfLife_unit = "years"
halfLife_value = 30.17
massNumber = 137
symbol = "Cs-137"

[[items]]
code = "015"
slug = "strontium-90"
name = "ストロンチウム-90"
description = "骨に取り込まれやすい核分裂生成物で、環境モニタリングの重要対象です。"
atomicNumber = 38
category = "fission-product"
decayMode = "beta decay"
halfLife_seconds = 909000000
halfLife_unit = "years"
halfLife_value = 28.8
massNumber = 90
symbol = "Sr-90"

[[items]]
code = "016"
slug = "tritium"
name = "トリチウム（三重水素）"
description = "水素の放射性同位体で、核融合研究や時計の発光塗料に使用されます。"
atomicNumber = 1
category = "cosmogenic"
decayMode = "beta decay"
halfLife_seconds = 388000000
halfLife_unit = "years"
halfLife_value = 12.3
massNumber = 3
symbol = "H-3"

[[items]]
code = "017"
slug = "cobalt-60"
name = "コバルト-60"
description = "がん治療用の放射線源として広く使用される人工放射性同位体です。"
atomicNumber = 27
category = "artificial"
decayMode = "beta decay"
halfLife_seconds = 166000000
halfLife_unit = "years"
halfLife_value = 5.27
massNumber = 60
symbol = "Co-60"

[[items]]
code = "018"
slug = "iridium-192"
name = "イリジウム-192"
description = "工業用放射線透過試験に広く使用されるガンマ線源です。"
atomicNumber = 77
category = "artificial"
decayMode = "beta decay"
halfLife_seconds = 6380000
halfLife_unit = "days"
halfLife_value = 73.8
massNumber = 192
symbol = "Ir-192"

[[items]]
code = "019"
slug = "iodine-131"
name = "ヨウ素-131"
description = "甲状腺の診断と治療に使用される核医学用放射性同位体です。"
atomicNumber = 53
category = "fission-product"
decayMode = "beta decay"
halfLife_seconds = 695000
halfLife_unit = "days"
halfLife_value = 8.04
massNumber = 131
symbol = "I-131"

[[items]]
code = "020"
slug = "molybdenum-99"
name = "モリブデン-99"
description = "テクネチウム-99mの親核種であり、核医学診断の基盤となります。"
atomicNumber = 42
category = "fission-product"
decayMode = "beta decay"
halfLife_seconds = 237000
halfLife_unit = "hours"
halfLife_value = 65.9
massNumber = 99
symbol = "Mo-99"

[[items]]
code = "021"
slug = "technetium-99m"
name = "テクネチウム-99m"
description = "核医学診断で最も広く使用される放射性同位体です。"
atomicNumber = 43
category = "artificial"
decayMode = "isomeric transition"
halfLife_seconds = 21600
halfLife_unit = "hours"
halfLife_value = 6.01
massNumber = 99
symbol = "Tc-99m"

[[items]]
code = "022"
slug = "fluorine-18"
name = "フッ素-18"
description = "PET検査で使用される陽電子放出核種です。"
atomicNumber = 9
category = "artificial"
decayMode = "positron emission"
halfLife_seconds = 6588
halfLife_unit = "minutes"
halfLife_value = 109.8
massNumber = 18
symbol = "F-18"

[[items]]
code = "023"
slug = "radon-222"
name = "ラドン-222"
description = "室内空気汚染の原因となる自然発生の放射性ガスです。"
atomicNumber = 86
category = "naturally-occurring"
decayMode = "alpha decay"
halfLife_seconds = 330000
halfLife_unit = "days"
halfLife_value = 3.82
massNumber = 222
symbol = "Rn-222"

[[items]]
code = "024"
slug = "polonium-210"
name = "ポロニウム-210"
description = "強いアルファ線を放出し、かつては静電気除去装置に使用されました。"
atomicNumber = 84
category = "naturally-occurring"
decayMode = "alpha decay"
halfLife_seconds = 12000000
halfLife_unit = "days"
halfLife_value = 138.4
massNumber = 210
symbol = "Po-210"

[[items]]
code = "025"
slug = "bismuth-213"
name = "ビスマス-213"
description = "標的放射性核種治療に使用されるアルファ線源です。"
atomicNumber = 83
category = "artificial"
decayMode = "beta decay / alpha decay"
halfLife_seconds = 2736
halfLife_unit = "minutes"
halfLife_value = 45.6
massNumber = 213
symbol = "Bi-213"

[[items]]
code = "026"
slug = "actinium-225"
name = "アクチニウム-225"
description = "標的アルファ治療に使用される有望な放射性同位体です。"
atomicNumber = 89
category = "artificial"
decayMode = "alpha decay"
halfLife_seconds = 855000
halfLife_unit = "days"
halfLife_value = 9.9
massNumber = 225
symbol = "Ac-225"

[[items]]
code = "027"
slug = "lutetium-177"
name = "ルテチウム-177"
description = "神経内分泌腫瘍の治療に使用されるベータ線源です。"
atomicNumber = 71
category = "artificial"
decayMode = "beta decay"
halfLife_seconds = 575000
halfLife_unit = "days"
halfLife_value = 6.65
massNumber = 177
symbol = "Lu-177"

[[items]]
code = "028"
slug = "yttrium-90"
name = "イットリウム-90"
description = "肝がん治療（SIRT）に使用されるベータ線源です。"
atomicNumber = 39
category = "fission-product"
decayMode = "beta decay"
halfLife_seconds = 231000
halfLife_unit = "hours"
halfLife_value = 64.1
massNumber = 90
symbol = "Y-90"

[[items]]
code = "029"
slug = "phosphorus-32"
name = "リン-32"
description = "悪性腫瘍の治療と生物学研究に使用されます。"
atomicNumber = 15
category = "artificial"
decayMode = "beta decay"
halfLife_seconds = 1240000
halfLife_unit = "days"
halfLife_value = 14.3
massNumber = 32
symbol = "P-32"

[[items]]
code = "030"
slug = "sodium-24"
name = "ナトリウム-24"
description = "血流測定や工業用流量測定に使用されます。"
atomicNumber = 11
category = "artificial"
decayMode = "beta decay"
halfLife_seconds = 54000
halfLife_unit = "hours"
halfLife_value = 15
massNumber = 24
symbol = "Na-24"

[[items]]
code = "031"
slug = "gallium-68"
name = "ガリウム-68"
description = "PET検査で使用される陽電子放出核種です。"
atomicNumber = 31
category = "artificial"
decayMode = "positron emission"
halfLife_seconds = 4080
halfLife_unit = "minutes"
halfLife_value = 68
massNumber = 68
symbol = "Ga-68"

[[items]]
code = "032"
slug = "copper-64"
name = "銅-64"
description = "PET画像診断と放射性核種治療の両方に使用される多目的核種です。"
atomicNumber = 29
category = "artificial"
decayMode = "beta decay / positron emission / electron capture"
halfLife_seconds = 45720
halfLife_unit = "hours"
halfLife_value = 12.7
massNumber = 64
symbol = "Cu-64"

[[items]]
code = "033"
slug = "astatine-211"
name = "アスタチン-211"
description = "標的アルファ治療に使用される希少なハロゲン元素です。"
atomicNumber = 85
category = "artificial"
decayMode = "alpha decay / electron capture"
halfLife_seconds = 25920
halfLife_unit = "hours"
halfLife_value = 7.2
massNumber = 211
symbol = "At-211"

[[items]]
code = "034"
slug = "lead-212"
name = "鉛-212"
description = "トロウ系列の中間核種で、標的放射性核種治療に使用されます。"
atomicNumber = 82
category = "naturally-occurring"
decayMode = "beta decay"
halfLife_seconds = 38160
halfLife_unit = "hours"
halfLife_value = 10.6
massNumber = 212
symbol = "Pb-212"

[[items]]
code = "035"
slug = "thorium-229"
name = "トリウム-229"
description = "核時計の研究に使用されるトリウムの同位体です。"
atomicNumber = 90
category = "naturally-occurring"
decayMode = "alpha decay"
halfLife_seconds = 232000000000
halfLife_unit = "years"
halfLife_value = 7340
massNumber = 229
symbol = "Th-229"

[[items]]
code = "036"
slug = "protactinium-231"
name = "プロトアクチニウム-231"
description = "海洋循環の年代測定に使用される長寿命放射性核種です。"
atomicNumber = 91
category = "naturally-occurring"
decayMode = "alpha decay"
halfLife_seconds = 1030000000000
halfLife_unit = "years"
halfLife_value = 32760
massNumber = 231
symbol = "Pa-231"

[[items]]
code = "037"
slug = "neptunium-237"
name = "ネプツニウム-237"
description = "ネプツニウム系列の親核種であり、使用済み核燃料中に存在します。"
atomicNumber = 93
category = "transuranic"
decayMode = "alpha decay"
halfLife_seconds = 67500000000000
halfLife_unit = "×10⁶ years"
halfLife_value = 2.14
massNumber = 237
symbol = "Np-237"

[[items]]
code = "038"
slug = "curium-247"
name = "キュリウム-247"
description = "最も長い半減期を持つキュリウムの同位体です。"
atomicNumber = 96
category = "transuranic"
decayMode = "alpha decay"
halfLife_seconds = 492000000000000
halfLife_unit = "×10⁷ years"
halfLife_value = 1.56
massNumber = 247
symbol = "Cm-247"

[[items]]
code = "039"
slug = "einsteinium-252"
name = "アインスタイニウム-252"
description = "最も長い半減期を持つアインスタイニウムの同位体です。"
atomicNumber = 99
category = "transuranic"
decayMode = "alpha decay"
halfLife_seconds = 40800000
halfLife_unit = "days"
halfLife_value = 471.7
massNumber = 252
symbol = "Es-252"

[[items]]
code = "040"
slug = "californium-251"
name = "カリホルニウム-251"
description = "最も長い半減期を持つカリホルニウムの同位体です。"
atomicNumber = 98
category = "transuranic"
decayMode = "alpha decay"
halfLife_seconds = 28300000000
halfLife_unit = "years"
halfLife_value = 898
massNumber = 251
symbol = "Cf-251"