Manganese-57

Discovery of chromium, manganese, nickel, and copper isotopes

“…It took about 15 years following the first reports to determine and assign the correct half-life of 55 Cr. Searches for 56 Cr were initially unsuccessful.…”

“…Energy loss, time of flight, and magnetic rigidity measurements were made. "The spectra show evidence for 56 Cu and 55 Cu (1420 and 75 events respectively)." MeV which then bombarded calcium targets and 57 Zn was produced in the fusion-evaporation reaction 40 Ca( 20 Ne,3n).…”

“…The first tentative identification of 60 Cr was reported in 1980 by Breuer et al, and the new isotope was reported in their paper "Production of neutron-excess nuclei in 56 Fe-induced reactions" [39]. A beam of 56 In their paper "New neutron-rich isotopes in the scandium-to-nickel region, produced by fragmentation of a 500…”

“…Year Discovered 56 Mn was created by the (n,p) charge exchange reaction. The γ-ray spectrum was examined with a NaI(T1) scintillation spectrometer, while the β-ray spectrum was analyzed with an anthracene scintillation spectrometer.…”

“…"Manganese behaved surprisingly well, and yielded unequivocal results indicating that it is a simple element of mass number 55."3.9. 56 MnIn 1934 Amaldi et al discovered56 Mn which was announced in "Radioactivity Produced by Neutron Bombardment-V"[55]. Neutrons from beryllium powder mixed with emanation (radon) irradiated manganese targets at the Istituto Fisica della R. Università in Rome, Italy.…”