Beta spectra of /sup 90/Sr and /sup 90/Y

Abstract

Using as a base the beta energy spectra provided by T. R. England, the number spectra of \lSr""and |°Y were corrected for the Coulomb effects on the first forbidden shape factor using the tables of M. E. Rose, anc for higher order effects using the experimentally determined corrections of H. Daniel et al. We, therefore, present a fully corrected beta number spectrum of l£Sr and its daughter f°Y.The half-lives and end-point energies are also listed.

A 10−3 drift velocity monitoring chamber

“…The 90 Sr sources produce 2 × 10 6 electrons per second, with the energy distribution shown in figure 3. Only the electrons with an energy larger than approximately 0.8 MeV, amounting to about 20% of the total [3], will be able to cross the chamber and trigger the scintillator telescope.…”

Rate dependence, polarization, and light sensitivity of neutron-irradiated scCVD diamond sensors

“…There are essentially as many 90 Y decays as 90 Sr decays, and the 90 Y β-decay electron has a much higher end-point kinetic energy (2.283 MeV). Calculations based on the 90 Sr and 90 Y β-decay spectra in [17] and the CSDA Range for electrons in diamond from [18] show that ∼ 80% of the 90 Y β's will pass through 500 µm of diamond. However, some fraction of these will range out in the thin metal pads on the diamond and in the tape and foil covering the scintillation counter.…”