Crystal growth Single-crystal CrSb specimens were grown by the chemical vapour transport technique. Stoichiometric amounts of Cr (chunks, 99.995%) and Sb (Shots, 99.9999%) were used as source material. Iodine was added as a transport agent, calculated to have a pressure of 1 bar at growth conditions. The starting materials were sealed under vacuum in a quartz
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Explanation: What a sight to behold, when a night sky became filled with colors that appeared to rain over the Skógafoss waterfall in Iceland. This image was taken in a single 5 second exposure by the photographer in April 2025. Seeing an aurora is on many people’s bucket lists. But it is not easy. It requires high solar activity, dark
Almost since the first nuclear power plant started generating electricity in the 1950s, critics have pointed out the difficulty of safely disposing of highly radioactive spent fuel. In those days, radiation was among the few carcinogens that were recognized and could be measured easily. Cold-war anxieties amplified public fear of nuclear technologies and radiation. As
Few scientific phenomena have been associated with such an eerie blend of menace and promise as nuclear fission. Within seven years of the discovery of fission, in which a heavy atomic nucleus is split into smaller fragments to release energy, the world watched as the United States used it to destroy two Japanese cities. Less
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