Isotopes of hydrogen
From Biocrawler, the free encyclopedia.
The isotopes of hydrogen include two stable and five unstable isotopes.
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Isotopes
Hydrogen-1 (protium)
This isotope has its own article here.
Hydrogen-2 (deuterium)
This isotope has its own article here.
Hydrogen-3 (tritium)
This isotope has its own article here.
Hydrogen-4
Hydrogen-4 is a highly 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 this article (http://content.aip.org/APCPCS/v610/i1/920_1.html)). 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 weight is 4.0279121. It decays through neutron emission and has a half-life of 9.93696×10-23seconds.
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.
Hydrogen-5
Hydrogen-5 is a highly 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 (see this article (http://content.aip.org/APCPCS/v610/i1/920_1.html)). 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 8.01930×10-23 seconds.
Hydrogen-6
Hydrogen-6 decays through triple neutron emission and has a half-life of 3.26500×10-22 seconds.
Hydrogen-7
Hydrogen-7 is an isotope of hydrogen. The nucleus consists of a proton and six neutrons. It was first synthesized in 2003 by a group of Russian, Japanese and French scientists at Riken's RI Beam Science Laboratory by bombarding hydrogen with helium-8 atoms. In the resulting reaction, the helium-8's neutrons were donated to the hydrogen's nucleus. The two remaining protons were detected by the "Riken telescope", a device composed of several layers of sensors, positioned behind the target of the RI Beam cyclotron.
External links
- News of hydrogen-7 discovery (http://physicsweb.org/articles/news/7/3/3)
| Free neutron | Isotopes of hydrogen | Isotopes of lithium |
