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neutral particle comparison table
Subject is part of has acceptance statu is an instance of has antiparticle has number of quark has decompostion temperature has symbol has domain carries the force has lifetime has propagation direction has period has decay product has amplitude has discovery in space date has composition is a kind of has mass has quantum behavior has spin has synonym has definition has desintegration energy
ammonia  neutral particle   NH3                
antineutrino   neutrino            antiparticle Fermi-Dirac statistics1/2 The antiparticle of a neutrino. 
antineutron  radioactive particleneutron3    The average time in which a particle decays  the products produced immediately after decay     Fermi-Dirac statistics1/2 or 3/2 The antiparticle of a neutron. A neutron and antineutron both have the same mass and zero electric charge, but can be differentiated by their interactions: a neutron and an antineutron can annihilate into gamma rays, while two neutrons cannot.the total energy produced when the particle decays
carbon monoxide  neutral particle  < 10000 KCO              A molecule consisting of one carbon atom and one oxygen atom. It is the most abundant interstellar molecule after molecular hydrogen and is especially useful because it radiates at radio wavelengths, so astronomers can use it to map the distribution of molecular hydrogen. 
graviton hypothetical      gravity       hypothetical particle0Bose-Einstein statistics2force carrierThe quanta thought to convey gravitational force; analogous to the photons, gluons, and intermediate vector bosons of electromagnetism and the strong and weak nuclear forces. Predicted by quantum theory of gravity, gravitons have not yet been detected. 
methanol  neutral particle   CH3OH       1970     methyl alcoholMore rotational lines have been observed astronomically for it than for any other molecule. 
molecular hydrogen  diatomic molecule  < 10000 KH2         neutral particle    A molecule of hydrogen, discovered in interstellar space in 1970. H2 is a very hard molecule to detect. None of its transitions lie in the visible part of the spectrum. Second, being a symmetric homonuclear molecule, it does not have an electric-dipole rotation-vibration spectrum, and detection must be based on the weak quadrupole spectrum. Third, ultraviolet radiation is a very efficient dissociator of H2, so any H2 that survived would presumably be located inside very dense interstellar clouds. So far observations have borne out this supposition. Measurements of the region within about 1 kpc of the Sun suggest that H2 is about twice as abundant as atomic H. 
molecular oxygen  neutral particle  < 10000 KO2                
neutrino   antineutrino            massless particle0Fermi-Dirac statistics1/2 A stable particle with no charge, a rest mass of zero, and a spin of 1/2, that carries away energy in the course of nuclear reactions. Its main characteristic is the weakness of its interactions with all other particles. Since the wavelengths of neutrinos at the energies at which they are normally emitted from unstable nuclei are only a few thousandths of an angstrom (compared with the wavelength of a light photon which is several thousand angstroms), they have negligible probability (10-19 that of a light photon) of interacting with matter and escape at the speed of light. Neutrinos arise only in the energy-producing regions of stars and therefore, unlike light photons, provide direct evidence of conditions in stellar cores. There are two types of neutrinos, those associated with electrons (ve) and those associated with muons (vµ). 
neutronnucleus radioactive particle 3    15 minutes  proton, electron  two down quarks and one up quark 1.6749 × 10-24 gFermi-Dirac statistics1/2 Stable within the nucleus, the neutron if isolated decays, with a ha half-life of fifteen minutes.the total energy produced when the particle decays
photon       physicselectromagnetism       transverse wave0Bose-Einstein statistics1electromagnetic radiationA transverse wave of electric and magnetic fields which can propagate through empty space. 
pi0  neutral particle 2    -has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press  two γ-rays    264 meBose-Einstein statistics-has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Pressπ-meson  
positronium  boson      The average time in which a particle decays  the products produced immediately after decay     Bose-Einstein statisticsintegral A positron and electron bound together electrostaticaly.the total energy produced when the particle decays
water vapor  neutral particle   H2O                

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