Hydrogen-5 1010258 208321298 2008-04-26T14:06:47Z J.delanoy 2372780 Reverted edits by [[Special:Contributions/62.232.24.238|62.232.24.238]] ([[User talk:62.232.24.238|talk]]) to last version by DumZiBoT {{Infobox isotope | alternate_names = | symbol =H | mass_number =5 | mass = | num_neutrons =4 | num_protons =1 | abundance = | halflife =8.01930x10<sup>-23</sup> seconds | error_halflife = | background =#eee | text_color = | image = | decay_product = | decay_symbol = | decay_mass = | decay_mode1 = | decay_energy1 = | decay_mode2 = | decay_energy2 = | decay_mode3 = | decay_energy3 = | decay_mode4 = | decay_energy4 = | parent = | parent_symbol = | parent_mass = | parent_decay = | parent2 = | parent2_symbol = | parent2_mass = | parent2_decay = | spin =(1/2+) | excess_energy = | error1 = | binding_energy = | error2 = }}'''Hydrogen-5''' is a highly [[unstable isotope|unstable]] [[isotope]] of [[hydrogen]]. The nucleus consists of a proton and four neutrons. It has been synthesised in the laboratory by bombarding [[tritium]] with fast-moving tritium nuclei.<ref>[http://content.aip.org/APCPCS/v610/i1/920_1.html Cookies Required<!-- Bot generated title -->]</ref> In this experiment, the one tritium nucleus captures two neutrons from the other, becoming a nucleus with one proton and four neutrons. The remaining proton may be detected, and the existence of hydrogen-5 deduced. It decays through [[neutron emission]] and has a [[half-life]] of 8.01930×10<sup>-23</sup> [[second]]s. == See also == *[[Isotopes of hydrogen]] ==References== {{reflist}} {{Isotope|element=Hydrogen |lighter=[[Hydrogen-4]] |heavier=[[Hydrogen-6]] |before=None |after=[[Hydrogen-3]] '''(2[[neutron emission|n]]) }} [[Category:Isotopes of hydrogen]] [[ko:수소-5]] [[ru:Водород-5]] [[zh:氫-5]]