A half-life for titanium.The supernova explosion of a massive star produces a variety of radioactive elements, including the isotopes nickel-56, cobalt-57, and titanium-44. Instruments aboard spacecraft such as the Compton Gamma Ray Observatory Compton Gamma Ray Observatory Space observatory in service from 1991 to 2000 that was designed to identify the sources of celestial gamma rays. It was named after physicist Arthur Holly Compton. can detect the radiation emitted by these unstable nuclei when they decay. The observation of radiation from the decay of titanium-44 in a supernova remnant A supernova remnant (SNR) is the structure resulting from the gigantic explosion of a star in a supernova. The supernova remnant is bounded by an expanding shock wave, and consists of ejected material expanding from the explosion, and the interstellar material it sweeps up , in particular, serves as a powerful tool for stringently testing theoretical predictions of the conditions inside a catastrophically collapsing star. Now, several research teams have independently determined the half-life of titanium-44 with much greater accuracy than ever before, considerably reducing the main uncertainty in determining the abundance of that isotope in a supernova remnant. Reporting In the March 23 Physical Review Letters Physical Review Letters is one of the most prestigious journals in physics.[1] Since 1958, it has been published by the American Physical Society as an outgrowth of The Physical Review. , one group working at the National Superconducting Cyclotron Laboratory National Superconducting Cyclotron Laboratory (NSCL) is located on the campus of Michigan State University and is the leading rare isotope research facility in the United States. at Michigan State University Michigan State University, at East Lansing; land-grant and state supported; coeducational; chartered 1855. It opened in 1857 as Michigan Agricultural College, the first state agricultural college. in East Lansing and another group running experiments at three different laboratories obtained a value of 59.2 years as the time it takes half a sample of titanium-44 to decay. |
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