Nuclear Data Sheets for A=245

Abstract

Available information pertaining to the nuclear structure of ground and excited states for all known nuclei with mass numbers A=245 have been compiled and evaluated. The adopted level and decay schemes, as well as the detailed nuclear properties and configuration assignments based on experimental data, are presented for these nuclides. When there are insufficient data, expected values from systematics of nuclear properties and/or theoretical calculations are utilized. Unexpected or discrepant experimental results are also noted. Since the last evaluation, new rotational bands in ²⁴⁵Pu have been observed to high spin from transfer reaction ²⁴⁴Pu(²⁰⁹Bi, ²⁰⁸Biγ) by 2014Ho16. While in ²⁴⁵Am, the ²⁴⁹Bk α decay measurements by 2013Ah03 added a new rotational band based on π3/2[521] configuration. The ²⁴⁵Pu β⁻ decay scheme is basically what was proposed in the late 60's and 47 γ rays have still not been placed. In ²⁴⁵Cm, precise alpha energies and intensities were measured by 2015Ah03 in ²⁴⁹Cf α decay. Their reported alpha energies of the main α group were about 2 keV lower than in the previous evaluation. The spin and parity of the g.s. of ²⁴⁵Es is still ambiguous as more detailed information on the decay is needed. With the production of ²⁴⁹No via fusion evaporation reaction by groups in Dubna and GSI, it's alpha decay was studied and some properties of the daughter ²⁴⁵Fm were published and included in this evalaution. Information on the other nuclides is scarce and not much has been investigated since the last evaluation. A summary and compilation of the discovery of the various nuclides in this mass region is given in: 2013Fr02 (²⁴⁵Pu, ²⁴⁵Am, ²⁴⁵Cm, ²⁴⁵Bk, ²⁴⁵Cf), 2011Me01 (²⁴⁵Es), and 2013Th02 (²⁴⁵Md, ²⁴⁵Fm).