Template:Critical mass

Nuclide	Half-life (y)	Critical mass (kg)	Diameter (cm)	Ref
uranium-233	159,200	15	11	^[1]
uranium-235	703,800,000	52	17	^[1]
neptunium-236	154,000	7	8.7	^[2]
neptunium-237	2,144,000	60	18	^[3]^[4]
plutonium-238	87.7	9.04–10.07	9.5–9.9	^[5]
plutonium-239	24,110	10	9.9	^[1]^[5]
plutonium-240	6561	40	15	^[1]
plutonium-241	14.3	12	10.5	^[6]
plutonium-242	375,000	75–100	19–21	^[6]
americium-241	432.2	55–77	20–23	^[7]
americium-242m	141	9–14	11–13	^[7]
americium-243	7370	180–280	30–35	^[7]
curium-243	29.1	7.34–10	10–11	^[8]
curium-244	18.1	13.5–30	12.4–16	^[8]
curium-245	8500	9.41–12.3	11–12	^[8]
curium-246	4760	39–70.1	18–21	^[8]
curium-247	15,600,000	6.94–7.06	9.9	^[8]
berkelium-247	1380	75.7	11.8-12.2	^[9]
berkelium-249	0.9	192	16.1-16.6	^[9]
californium-249	351	6	9	^[2]
californium-251	900	5.46	8.5	^[2]
californium-252	2.6	2.73	6.9	^[10]
einsteinium-254	0.755	9.89	7.1	^[9]

^ ^a ^b ^c ^d Nuclear Weapons Design & Materials, The Nuclear Threat Initiative website.^{[dead link‍]}^{[unreliable source?]}
^ ^a ^b ^c Final Report, Evaluation of nuclear criticality safety data and limits for actinides in transport, Republic of France, Institut de Radioprotection et de Sûreté Nucléaire, Département de Prévention et d'étude des Accidents.
^ Chapter 5, Troubles tomorrow? Separated Neptunium 237 and Americium, Challenges of Fissile Material Control (1999), isis-online.org
^ P. Weiss (26 October 2002). "Neptunium Nukes? Little-studied metal goes critical". Science News. 162 (17): 259. doi:10.2307/4014034. Archived from the original on 15 December 2012. Retrieved 7 November 2013.
^ ^a ^b Updated Critical Mass Estimates for Plutonium-238, U.S. Department of Energy: Office of Scientific & Technical Information
^ ^a ^b Amory B. Lovins, Nuclear weapons and power-reactor plutonium, Nature, Vol. 283, No. 5750, pp. 817–823, February 28, 1980
^ ^a ^b ^c Dias, Hemanth; Tancock, Nigel; Clayton, Angela (2003). "Critical Mass Calculations for ²⁴¹Am, ^242mAm and ²⁴³Am" (PDF). Challenges in the Pursuit of Global Nuclear Criticality Safety. Proceedings of the Seventh International Conference on Nuclear Criticality Safety. Vol. II. Tokai, Ibaraki, Japan: Japan Atomic Energy Research Institute. pp. 618–623.
^ ^a ^b ^c ^d ^e Okuno, Hiroshi; Kawasaki, Hiromitsu (2002). "Critical and Subcritical Mass Calculations of Curium-243 to -247 Based on JENDL-3.2 for Revision of ANSI/ANS-8.15". Journal of Nuclear Science and Technology. 39 (10): 1072–1085. doi:10.1080/18811248.2002.9715296.
^ ^a ^b ^c Institut de Radioprotection et de Sûreté Nucléaire: "Evaluation of nuclear criticality safety. data and limits for actinides in transport", p. 16
^ Carey Sublette, Nuclear Weapons Frequently Asked Questions: Section 6.0 Nuclear Materials February 20, 1999

[nti-1] Nuclear Weapons Design & Materials, The Nuclear Threat Initiative website.^{[dead link‍]}^{[unreliable source?]}

[europa-2] Final Report, Evaluation of nuclear criticality safety data and limits for actinides in transport, Republic of France, Institut de Radioprotection et de Sûreté Nucléaire, Département de Prévention et d'étude des Accidents.

[isis-3] Chapter 5, Troubles tomorrow? Separated Neptunium 237 and Americium, Challenges of Fissile Material Control (1999), isis-online.org

[critical-4] P. Weiss (26 October 2002). "Neptunium Nukes? Little-studied metal goes critical". Science News. 162 (17): 259. doi:10.2307/4014034. Archived from the original on 15 December 2012. Retrieved 7 November 2013.

[sti-5] Updated Critical Mass Estimates for Plutonium-238, U.S. Department of Energy: Office of Scientific & Technical Information

[rmi-6] Amory B. Lovins, Nuclear weapons and power-reactor plutonium, Nature, Vol. 283, No. 5750, pp. 817–823, February 28, 1980

[dias-7] Dias, Hemanth; Tancock, Nigel; Clayton, Angela (2003). "Critical Mass Calculations for ²⁴¹Am, ^242mAm and ²⁴³Am" (PDF). Challenges in the Pursuit of Global Nuclear Criticality Safety. Proceedings of the Seventh International Conference on Nuclear Criticality Safety. Vol. II. Tokai, Ibaraki, Japan: Japan Atomic Energy Research Institute. pp. 618–623.

[jnst-8] Okuno, Hiroshi; Kawasaki, Hiromitsu (2002). "Critical and Subcritical Mass Calculations of Curium-243 to -247 Based on JENDL-3.2 for Revision of ANSI/ANS-8.15". Journal of Nuclear Science and Technology. 39 (10): 1072–1085. doi:10.1080/18811248.2002.9715296.

[irsn-9] Institut de Radioprotection et de Sûreté Nucléaire: "Evaluation of nuclear criticality safety. data and limits for actinides in transport", p. 16

[nukemet-10] Carey Sublette, Nuclear Weapons Frequently Asked Questions: Section 6.0 Nuclear Materials February 20, 1999

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