|Author||Max-Planck, Roland Diehl ♦ Diehl, Roland ♦ Timmes, Frank X. ♦ Ni|
|Subject Domain (in DDC)||Computer science, information & general works ♦ Data processing & computer science|
|Subject Keyword||Introduction Radioactivity ♦ Chemical Combination ♦ Galactic Fl-ray Sky ♦ Uranium Present ♦ Radioactive Substance ♦ Term Radioactive ♦ Spatial Distribution ♦ Photographic Emulsion Mixture ♦ Radioactive Decay ♦ Ernest Rutherford ♦ Uranium Compound ♦ Henri Becquerel ♦ Uranium Sulfate ♦ Light Source ♦ Different Kind ♦ Chemical Evolution|
|Abstract||. Measurements of the Galactic fl-ray sky in lines attributed to the radioactive decay of 7 Be, 22 Na, 26 Al, 44 Ti, 56 Ni, and 60 Fe are collected, organized, and collated with models for the production sites/mechanisms, spatial distributions, and the chemical evolution of these isotopes. INTRODUCTION Radioactivity was discovered a little more than a century ago when Henri Becquerel included potassium and uranium sulfates as part of a photographic emulsion mixture (Becquerel 1896). He soon found that all uranium compounds and the metal itself were "light sources", the intensity was proportional to the amount of uranium present, with chemical combination having no effect. Two years later, Pierre and Marie Curie coined the term "radioactive " for those elements that emitted such "Becquerel-rays". A year later, Ernest Rutherford demonstrated that at least three different kinds of radiation are emitted in the decay of radioactive substances. He called these "alpha", "beta...|
|Educational Role||Student ♦ Teacher|
|Age Range||above 22 year|
|Education Level||UG and PG ♦ Career/Technical Study|
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