Discovery of the arsenic isotopes

Abstract

Twenty-nine arsenic isotopes have so far been observed; the discovery of these isotopes is discussed. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented.

Current status and future potential of nuclide discoveries

“…Although not impossible it is unlikely that further nuclides will exist for which characteristic resonance parameters can be measured. 63 Se not measured 35 68 Br not measured, but 69 Br unbound 36 68 Kr not measured 37 72 Rb not measured, but 73 Rb unbound 38 72 Sr not measured 39 75 Y not measured 40 77 Zr not measured 41 81 Nb Z. Janas 1999 GANIL [150] 42 82 Mo not measured 43 85 Tc Z. Janas 1999 GANIL [150] For neutron rich nuclei characteristic properties of at least two isotopes beyond the neutron dripline have been identified for the lightest elements, hydrogen, helium and lithium. Neutron rich nuclides between beryllium and magnesium which have been shown or expected to be unbound but have not been observed are listed in Table 5.…”

Discovery of the vanadium isotopes

“…Previously, the discovery of cerium [1], arsenic [2], gold [3], tungsten [4], and krypton [5] isotopes was discussed. Guidelines for assigning credit for discovery are (1) clear identification, either through decay-curves and relationships to other known isotopes, particle or c-ray spectra, or unique mass and Z-identification, and (2) publication of the discovery in a refereed journal.…”