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! न्यूक्लाइड !! क्रांतिक द्रव्यमान<br />(kg) !! व्यास<br />(सेमी) !! सन्दर्भ
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| [[यूरेनियम-233]] || 15 || 11 || <ref name=nti>[http://www.nti.org/e_research/cnwm/overview/technical2.asp Nuclear Weapons Design & Materials], [http://www.nti.org/ The Nuclear Threat Initiative website].</ref>
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| [[यूरेनियम-235]] || 52 || 17 || <ref name=nti/>
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| [[नेप्चूनियम-236]] || 7 || 8.7 || <ref name=europa>[http://ec.europa.eu/energy/nuclear/transport/doc/irsn_sect03_146.pdf 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.</ref>
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| [[नेप्चूनियम-237]] || 60 || 18 || <ref name=isis>Chapter 5, [http://www.isis-online.org/publications/fmct/book/New%20chapter%205.pdf Troubles tomorrow? Separated Neptunium 237 and Americium], [http://isis-online.org/books/detail/challenges-of-fissile-material-control/ Challenges of Fissile Material Control] (1999), isis-online.org</ref><ref name=lanl>http://www.lanl.gov/news/index.php?fuseaction=home.story&story_id=1348{{citation broken|date=March 2009}}</ref>
|-
| [[प्लूटोनियम-238]] || 9.04–10.07 || 9.5-9.9 || <ref name=sti>[http://sti.srs.gov/fulltext/ms9900313/ms9900313.html Updated Critical Mass Estimates for Plutonium-238], U.S. Department of Energy: Office of Scientific & Technical Information</ref>
|-
| [[प्लूटोनियम-239]] || 10 || 9.9 || <ref name=nti/><ref name=sti/>
|-
| [[प्लूटोनियम-240]] || 40 || 15 || <ref name=nti/>
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| [[प्लूटोनियम-241]] || 12 || 10.5 || <ref name=rmi>Amory B. Lovins, [http://www.nature.com/nature/journal/v283/n5750/abs/283817a0.html Nuclear weapons and power-reactor plutonium], Nature, Vol. 283, No. 5750, pp. 817-823, February 28, 1980
</ref>
|-
| [[प्लूटोनियम-242]] || 75–100 || 19-21 || <ref name=rmi/>
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| [[अमेरिसियम-241]] || 55–77 || 20-23 || <ref name=dias>http://typhoon.tokai-sc.jaea.go.jp/icnc2003/Proceeding/paper/6.5_022.pdf{{citation broken|date=March 2009}} Dias et al.</ref>
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| [[americium-242]] || 9–14 || 11-13 || <ref name=dias/>
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| [[americium-243]] || 180–280 || 30-35 || <ref name=dias/>
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| [[curium]]-243 || 7.34–10 || 10-11 || <ref name=jnst>Hirshi Okuno and Hirumitsu Kawasaki, [http://wwwsoc.nii.ac.jp/aesj/publication/JNST2002/No.10/39_1072-1085.pdf Technical Report, Critical and Subcritical Mass Calculations for Curium-243 to -247 ], Japan National Institute of Informatics, Reprinted from Joournal of Nuclear Science and technology, Vol.39 No.10 p.1072-1085 (October 2002){{Copyvio link|date=March 2009}}</ref>
|-
| [[curium]]-244 || (13.5)–30 || (12.4)–16 || <ref name=jnst/>
|-
| [[curium]]-245 || 9.41–12.3 || 11-12 || <ref name=jnst/>
|-
| [[curium]]-246 || 39–70.1 || 18-21 || <ref name=jnst/>
|-
| [[curium]]-247 || 6.94–7.06 || 9.9 || <ref name=jnst/>
|-
| [[californium]]-249 || 6 || 9 || <ref name=europa/>
|-
| [[californium]]-251 || 5 || 8.5 || <ref name=europa/>
|-
| [[californium]]-252 || 2.73 || 6.9 || <ref name=nukemet>[http://nuclearweaponarchive.org/Nwfaq/Nfaq6.html#nfaq6.2]</ref>
|}
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