Mass and β Decay of Ne25, a Tz=+52 Nuclide Academic Article uri icon

abstract

  • The first reported measurement of the delayed γ-ray spectrum following the β decay of Ne25 is presented. Ne25 recoils from the Be9(O18,2p)Ne25 reaction were thermalized in He gas and transferred through traps to a remotely located counting station. γ and β rays were counted simultaneously with Ge(Li) and NE102 detectors, respectively. γ-ray energies (in keV) and relative intensities for the Na25 daughter transitions are 89.53 ± 0.10 (95.5 ± 0.6), 979.77 ± 0.16 (18.1 ± 1.9), 1069.30 ± 0.19 (2.34 ± 0.38), 2112.5 ± 1.0 (0.62 ± 0.19), 2202.0 ± 1.0 (1.1 ± 0.3), and 3688 ± 3 (0.96 ± 0.24). The ground-state β branch has been measured to be less than 20% of all β branches. The Na25 excitation energies (in keV) and β branches (in%, assuming the ground-state branch is zero) are 89.53 ± 0.10 (76.8 ± 1.9), 1069.32 ± 0.19 (19.2 ± 2.0), 2202 ± 1 (2.3 ± 0.5), and 3688 ± 3 (1.18 ± 0.30). A 0.52 ± 0.15% branch is tentatively assigned to a state in Na25 at 4289 ± 3 keV, on the basis of an observed 3220 ± 3-keV γ ray. The half-life of Ne25 has been measured to be 602 ± 8 msec. By measuring the end-point energy of the β spectrum populating the first excited state of Na25 the mass excess of Ne25 has been measured to be -1.96 ± 0.30 MeV. Comparison of the mass and decay of Ne25 with theoretical estimates and models is made. © 1973 The American Physical Society.

author list (cited authors)

  • Goosman, D. R., Alburger, D. E., & Hardy, J. C.

citation count

  • 19

publication date

  • March 1973