Hydrogen-4
1010252
214411413
2008-05-23T12:59:29Z
Pamputt
3596959
add link to French article
{{Infobox isotope
| alternate_names =
| symbol =H
| mass_number =4
| mass =4.0279121
| num_neutrons =3
| num_protons =1
| abundance =
| halflife =9.93696x10<sup>-23</sup> seconds
| error_halflife =
| background =#eee
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| decay_mode4 =
| decay_energy4 =
| parent =
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| spin =2
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}}
'''Hydrogen-4''' is a highly [[unstable isotope|unstable]] [[isotope]] of [[hydrogen]]. The nucleus consists of a proton and three neutrons. It has been synthesised in the laboratory by bombarding [[tritium]] with fast-moving [[deuterium]] nuclei (see [http://content.aip.org/APCPCS/v610/i1/920_1.html this article]). In this experiment, the tritium nuclei captured neutrons from the fast-moving deuterium nucleus. The presence of the hydrogen-4 was deduced by detecting the emitted protons. Its [[atomic mass]] is 4.0279121. It decays through [[neutron emission]] and has a [[half-life]] of 9.93696x10<sup>-23</sup> [[second]]s.
==Quadium==
In the [[1955]] satirical novel ''[[The Mouse That Roared]]'', the name '''quadium''' was given to the hydrogen-4 isotope that powered the ''Q-bomb'' that the [[Duchy of Grand Fenwick]] captured from the [[United States]].
==See also==
*[[Isotopes of hydrogen]]
{{Isotope|element=Hydrogen
|lighter=[[Hydrogen-3]]
|heavier=[[Hydrogen-5]]
|before=None
|after=[[Hydrogen-3]]
}}
[[Category:Isotopes of hydrogen]]
[[fr:Quaternium]]
[[ko:수소-4]]
[[ru:Водород-4]]
[[zh:氫-4]]
[[tr:Hidrojen-4]]