About: Insertion time

An Entity of Type: WikicatNuclearWeapons, from Named Graph: http://dbpedia.org, within Data Space: dbpedia.org

The term insertion time is used to describe the length of time which is required to rearrange a subcritical mass of fissile material into a prompt critical mass. This is one of the three main requirements in a nuclear weapon design to create a working fission atomic bomb. The need for a short insertion time with plutonium-239 is the reason the implosion method was chosen for the first plutonium bomb, while with uranium-235 it is possible to use a gun design. The basic requirements are:

Property	Value
dbo:abstract	The term insertion time is used to describe the length of time which is required to rearrange a subcritical mass of fissile material into a prompt critical mass. This is one of the three main requirements in a nuclear weapon design to create a working fission atomic bomb. The need for a short insertion time with plutonium-239 is the reason the implosion method was chosen for the first plutonium bomb, while with uranium-235 it is possible to use a gun design. The basic requirements are: * To start with a subcritical system * To create a super prompt critical system * To make the change between these two states in a length of time (insertion time) which is shorter than the time between the random appearance of a neutron in the fissile material through spontaneous fission or by other random processes. * Also at the right moment in time, neutrons must be injected into the fissile material to start up the fission process. This can be done by several methods. * Alpha emitters such as polonium or plutonium-238 can be rapidly combined with beryllium to create a neutron source. * Neutrons can be generated using an electrostatic discharge tube, this tube uses the D-T reaction. (en)
dbo:wikiPageID	7174639 (xsd:integer)
dbo:wikiPageLength	1436 (xsd:nonNegativeInteger)
dbo:wikiPageRevisionID	805738769 (xsd:integer)
dbo:wikiPageWikiLink	dbr:Beryllium dbr:Uranium-235 dbr:Polonium dbr:Nuclear_weapon_design dbr:Critical_mass dbr:Prompt_critical dbc:Nuclear_weapons dbr:D-T_reaction dbr:Fissile dbr:Atomic_bomb dbc:Nuclear_physics dbc:Nuclear_technology dbr:Plutonium-238 dbr:Plutonium-239 dbr:Spontaneous_fission dbr:Neutron dbr:Subcritical
dbp:wikiPageUsesTemplate	dbt:Reflist dbt:Unreferenced
dcterms:subject	dbc:Nuclear_weapons dbc:Nuclear_physics dbc:Nuclear_technology
rdf:type	yago:WikicatNuclearWeapons yago:Artifact100021939 yago:Device103183080 yago:Instrument103574816 yago:Instrumentality103575240 yago:NuclearWeapon103834604 yago:Object100002684 yago:PhysicalEntity100001930 yago:Weapon104565375 yago:WeaponOfMassDestruction104565963 yago:Whole100003553
rdfs:comment	The term insertion time is used to describe the length of time which is required to rearrange a subcritical mass of fissile material into a prompt critical mass. This is one of the three main requirements in a nuclear weapon design to create a working fission atomic bomb. The need for a short insertion time with plutonium-239 is the reason the implosion method was chosen for the first plutonium bomb, while with uranium-235 it is possible to use a gun design. The basic requirements are: (en)
rdfs:label	Insertion time (en)
owl:sameAs	freebase:Insertion time yago-res:Insertion time wikidata:Insertion time https://global.dbpedia.org/id/4nG2g
prov:wasDerivedFrom	wikipedia-en:Insertion_time?oldid=805738769&ns=0
foaf:isPrimaryTopicOf	wikipedia-en:Insertion_time
is dbo:wikiPageWikiLink of	dbr:Index_of_physics_articles_(I) dbr:Nuclear_weapon_design dbr:Spontaneous_fission
is foaf:primaryTopic of	wikipedia-en:Insertion_time

This content was extracted from Wikipedia and is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License