Template:Actinides vs fission products/sandbox

Actinides and fission products by half-life v t e
Actinides^[1] by decay chain				Half-life range (a)	Fission products by yield^[2]
4n	4n+1	4n+2	4n+3	Half-life range (a)		4.5–7%	0.04–1.25%	<0.001%
Template:Iso1				4 – 6	^†		Template:Iso1
Template:Iso1	Template:Iso1	Template:Iso1	Template:Iso1	10 – 29		Template:Iso1	Template:Iso1	Template:Iso1
Template:Iso1		Template:Iso1	Template:Iso1	29 – 97		Template:Iso1	Template:Iso1	Template:Iso1
	Template:Iso1	Template:Iso1		141 – 351		No fission products have a half-life in the range of 100 – 210k years…
	Template:Iso1		Template:Iso1^[3]	430 – 900
		Template:Iso1	Template:Iso1	1.3k – 1.6k
Template:Iso1	Template:Iso1	Template:Iso1	Template:Iso1	4.7k – 7.4k
	Template:Iso1	Template:Iso1		8.3k – 8.5k
			Template:Iso1	24.1k
		Template:Iso1	Template:Iso1	32k – 76k
Template:Iso1	Template:Iso1	Template:Iso1		150k – 250k	^‡	Template:Iso1	Template:Iso1
Template:Iso1		Template:Iso1		327k – 375k			Template:Iso1
				1.53M		Template:Iso1
	Template:Iso1			2.15M – 6.5M		Template:Iso1	Template:Iso1
Template:Iso1			Template:Iso1	15M – 24M			Template:Iso1
Template:Iso1				80M		...nor beyond 15.7M^[4]
Template:Iso1		Template:Iso1	Template:Iso1	0.7G – 14G		...nor beyond 15.7M^[4]
Legend for superscript symbols used: ₡ has thermal neutron capture cross section in the range of 8 – 50 barns ƒ for fissile m is metastable isomer № for naturally occurring radioactive material (NORM) þ is neutron poison (thermal neutron capture cross section greater than 3k barns) † range 4a – 97a: Medium-lived fission product ‡ range 211ka – 15.7Ma: Long-lived fission product

References

↑ Plus radium (element 88). While actually a sub-actinide, it immediately precedes actinium (89) and follows a three element gap of instability after polonium (84) where no isotopes have half-lives of at least four years (the longest-lived isotope in the gap is radon-222 with a half life of less than four days). Radium's longest lived isotope, at a notable 1600 years, thus merits the element's inclusion here.
↑ Specifically from thermal neutron fission of U-235, e.g. in a typical nuclear reactor.
↑ This is the heaviest isotope with a half-life of at least four years before the "Sea of Instability".
↑ Excluding those 'classically stable' isotopes with half-lives significantly in excess of ²³²Th, e.g. while ^113mCd has a half-life of only fourteen years, that of ¹¹³Cd is nearly eight quadrillion.

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[1] Plus radium (element 88). While actually a sub-actinide, it immediately precedes actinium (89) and follows a three element gap of instability after polonium (84) where no isotopes have half-lives of at least four years (the longest-lived isotope in the gap is radon-222 with a half life of less than four days). Radium's longest lived isotope, at a notable 1600 years, thus merits the element's inclusion here.

[2] Specifically from thermal neutron fission of U-235, e.g. in a typical nuclear reactor.

[3] This is the heaviest isotope with a half-life of at least four years before the "Sea of Instability".

[4] Excluding those 'classically stable' isotopes with half-lives significantly in excess of ²³²Th, e.g. while ^113mCd has a half-life of only fourteen years, that of ¹¹³Cd is nearly eight quadrillion.

[1]

[2]

[3]

[4]