X-Ray Identification of Element 104

A History and Analysis of the Discovery of Elements 104 and 105

“…Cf( C,4n) 104 reactlon was made by a group working at the Oak Ridge National Laboratory. Bemis et al [56] were able to reproduce the Berkeley results. In addition they measured the spectrum of X-rays emitted in coincidence with the alpha-particles attributed to 257104 and found a pattern of K X-rays with the characteristic energies and relative intensities for element 102.…”

Selected spectroscopic results on element 115 decay chains

“…On the one hand, this hampers indirect methods of determining Z, not least because decay chains along the same isotopes may follow different decay paths depending on the starting point of a certain isotopic decay sequence. On the other hand, the possibility arises to observe X ray photons in the course of the electromagnetic internal conversion decays of the excited states in α-decay daughter nuclei [16]. X-ray energies are predicted with high precision even for the heaviest elements since long (e.g.…”

Decay spectroscopy of element 115 daughters:Rg280→Mt276andMtGates1, Gregorich2, Gothe3 et al. 2015Phys. Rev. C522200View full textAdd to dashboardCite

“…However, one method to firmly establish Z is through the observation of characteristic K x-rays, the energies of which have been accurately and precisely calculated [13][14][15]; this method has been previously used to identify Z>100 [16], and is a promising avenue in the case of SHE.…”