Изотопи на франциумот

Франциумот (<sub>87</sub>Fr) нема стабилни изотопи, па затоа не може да се даде стандардна атомска тежина. Неговиот најстабилен изотоп е <sup>223</sup>Fr со полуживот од 22 минути, кој се јавува во трагови во природата како распаден меѓупроизвод од <sup>235</sup>U.
Од елементите чии најстабилни изотопи се со сигурност идентификувани, франциумот е најнестабилен. Сите елементи со атомски број 106 (сиборгиум) или поголем имаат најстабилни познати изотопи пократковечни од оние на франциумот, но бидејќи тие елементи имаат само релативно мал број на откриени изотопи, останува можноста дека неоткриените изотопи на овие елементи може да имаат подолг полуживот.
1 Список на изотопите
<sup>197</sup>Fr, 87, 110, 197,01101(6), 2,3(19) мс, α, <sup>193</sup>At, (7/2−)
<sup>198</sup>Fr, 87, 111, 198,01028(3), 15(3) мс, α, <sup>194</sup>At, 3+#
<sup>199</sup>Fr, 87, 112, 199,007269(15), 16(7) мс, α, <sup>195</sup>At, 1/2+#
<sup>200</sup>Fr, 87, 113, 200,00658(3), 24(10) мс, α, <sup>196</sup>At, 3+#
<sup>200m</sup>Fr, 60(110) keV, 190(120) мс, α, <sup>196</sup>At, 10−#
<sup>201</sup>Fr, 87, 114, 201,003852(10), 67(3) мс, α (99%), <sup>197</sup>At, (9/2−)
β<sup>+</sup> (1%), <sup>201</sup>Rn
<sup>202</sup>Fr, 87, 115, 202,003330(6), 290(30) мс, α (97%), <sup>198</sup>At, (3+)
β<sup>+</sup> (3%), <sup>202</sup>Rn
<sup>202m</sup>Fr, 330(90)# keV, 340(40) мс, α (97%), <sup>198</sup>At, (10−)
β<sup>+</sup> (3%), <sup>202</sup>Rn
<sup>203</sup>Fr, 87, 116, 203,000941(7), 0,55(2) с, α (95%), <sup>199</sup>At, (9/2−)#
β<sup>+</sup> (5%), <sup>203</sup>Rn
<sup>204</sup>Fr, 87, 117, 204,000652(26), 1,7(3) с, α (96%), <sup>200</sup>At, (3+)
β<sup>+</sup> (4%), <sup>204</sup>Rn
<sup>204m1</sup>Fr, 50(4) keV, 2,6(3) с, α (90%), <sup>200</sup>At, (7+)
β<sup>+</sup> (10%), <sup>204</sup>Rn
<sup>204m2</sup>Fr, 326(4) keV, 1,7(6) с, (10−)
<sup>205</sup>Fr, 87, 118, 204,998594(8), 3,80(3) с, α (99%), <sup>201</sup>At, (9/2−)
β<sup>+</sup> (1%), <sup>205</sup>Rn
<sup>206</sup>Fr, 87, 119, 205,998661(30), ~16 с, β<sup>+</sup> (58%), <sup>206</sup>Rn, (2+, 3+)
α (42%), <sup>202</sup>At
<sup>206m1</sup>Fr, 190(40) keV, 15,9(1) с, (7+)
<sup>206m2</sup>Fr, 730(40) keV, 700(100) мс, (10−)
<sup>207</sup>Fr, 87, 120, 206,996941(19), 14,8(1) с, α (95%), <sup>203</sup>At, 9/2−
β<sup>+</sup> (5%), <sup>207</sup>Rn
<sup>208</sup>Fr, 87, 121, 207,997139(13), 59,1(3) с, α (90%), <sup>204</sup>At, 7+
β<sup>+</sup> (10%), <sup>208</sup>Rn
<sup>209</sup>Fr, 87, 122, 208,995940(12), 50,0(3) с, α (89%), <sup>205</sup>At, 9/2−
β<sup>+</sup> (11%), <sup>209</sup>Rn
<sup>210</sup>Fr, 87, 123, 209,996411(14), 3,18(6) мин, α (60%), <sup>206</sup>At, 6+
β<sup>+</sup> (40%), <sup>210</sup>Rn
<sup>211</sup>Fr, 87, 124, 210,995555(13), 3,10(2) мин, α (80%), <sup>207</sup>At, 9/2−
β<sup>+</sup> (20%), <sup>211</sup>Rn
<sup>212</sup>Fr, 87, 125, 211,996225(9), 20,0(6) мин, β<sup>+</sup> (57%), <sup>212</sup>Rn, 5+
α (43%), <sup>208</sup>At
<sup>213</sup>Fr, 87, 126, 212,996184(5), 34,14(6) с, α (99,45%), <sup>209</sup>At, 9/2−
β<sup>+</sup> (,55%), <sup>213</sup>Rn
<sup>214</sup>Fr, 87, 127, 213,998971(9), 5,0(2) мс, α, <sup>210</sup>At, (1−)
<sup>214m1</sup>Fr, 123(6) keV, 3,35(5) мс, α, <sup>210</sup>At, (8−)
<sup>214m2</sup>Fr, 638(6) keV, 103(4) нс, (11+)
<sup>214m3</sup>Fr, 6477+Y keV, 108(7) нс, (33+)
<sup>215</sup>Fr, 87, 128, 215,000342(8), 86(5) нс, α, <sup>211</sup>At, 9/2−
<sup>216</sup>Fr, 87, 129, 216,003190(4), 0,70(2) μс, α, <sup>212</sup>At, (1−)
<sup>216m</sup>Fr, 219(6) keV, 850(30) нс, α, <sup>212</sup>At, (9−)
<sup>217</sup>Fr, 87, 130, 217,004632(7), 16,8(19) μс, α, <sup>213</sup>At, 9/2−
<sup>218</sup>Fr, 87, 131, 218,007579(5), 1,0(6) мс, α, <sup>214</sup>At, 1−
<sup>218m1</sup>Fr, 86(4) keV, 22,0(5) мс, α, <sup>214</sup>At, (8−)
<sup>218m2</sup>Fr, 200(150)# keV, high
<sup>219</sup>Fr, 87, 132, 219,009251(7), 20(2) мс, α, <sup>215</sup>At, 9/2−
<sup>220</sup>Fr, 87, 133, 220,012327(4), 27,4(3) с, α (99,65%), <sup>216</sup>At, 1+
β<sup>−</sup> (,35%), <sup>220</sup>Ra
<sup>221</sup>Fr, 87, 134, 221,014254(5), 4,801(5) мин, α (99,9%), <sup>217</sup>At, 5/2−, Траги<ref меѓупроизвод на <sup>237</sup>Np
β<sup>−</sup> (,1%), <sup>221</sup>Ra
CD (8,79×10<sup>−11</sup>%), <sup>207</sup>Tl<sup>14</sup>C
<sup>222</sup>Fr, 87, 135, 222,017583(8), 14,2(3) мин, β<sup>−</sup>, <sup>222</sup>Ra, 2−
<sup>223</sup>Fr, Актиниум K, 87, 136, 223,0197342(21), 22,00(7) мин, β<sup>−</sup> (99,99%), <sup>223</sup>Ra, 3/2(−), Траги
α (,006%), <sup>219</sup>At
<sup>224</sup>Fr, 87, 137, 224,023348(12), 3,33(10) мин, β<sup>−</sup>, <sup>224</sup>Ra, 1−
<sup>225</sup>Fr, 87, 138, 225,025572(13), 4,0(2) мин, β<sup>−</sup>, <sup>225</sup>Ra, 3/2−
<sup>226</sup>Fr, 87, 139, 226,029545(7), 49(1) с, β<sup>−</sup>, <sup>226</sup>Ra, 1−
<sup>227</sup>Fr, 87, 140, 227,031865(6), 2,47(3) мин, β<sup>−</sup>, <sup>227</sup>Ra, 1/2+
<sup>228</sup>Fr, 87, 141, 228,035839(7), 38(1) с, β<sup>−</sup>, <sup>228</sup>Ra, 2−
<sup>229</sup>Fr, 87, 142, 229,038291(5), 50,2(4) с, β<sup>−</sup>, <sup>229</sup>Ra, (1/2+)#
<sup>230</sup>Fr, 87, 143, 230,042391(7), 19,1(5) с, β<sup>−</sup>, <sup>230</sup>Ra
<sup>231</sup>Fr, 87, 144, 231,045175(8), 17,6(6) с, β<sup>−</sup>, <sup>231</sup>Ra, (1/2+)#
<sup>232</sup>Fr, 87, 145, 232,049461(15), 5(1) с, β<sup>−</sup>, <sup>232</sup>Ra
<sup>233</sup>Fr, 87, 146, 233,052518(21), 900(100) мс, β<sup>−</sup>, <sup>233</sup>Ra, 1/2+ #
2 Наводи
* Half-life, spin, and isomer data selected from the following sources.
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