Energy levels of A = 21−44 nuclei (V)

Nuclear Data Sheets for A = 125

A study of Coulomb field effects in internal bremsstrahlung (IB) has been undertaken by measuring the IB spectra for the allowed beta emitters 32P, 35S and 45Ca in the photon energy intervals of 50-1600 keV, 25-150 keV and 30-240 keV respectively. The experimental results show increasing positive departures from the KUB and Coulomb corrected theories of Lewis and Ford (1957), and Nilsson (1956), with decreasing beta end-point energy. In the case of 35S the experimental results are 40% higher than the more exact theory of Struzynksi and Pollock (see Nucl. Phys., vol.79, p.113 of 1966) for this isotope.

https://iopscience.iop.org/article/10.1088/0305-4616/2/1/006/pdf

Internal bremsstrahlung spectra of the allowed beta emitters 32P, 35S and 45Ca

Inner bremsstrahlung (IB) accompanying the beta --decay of 63Ni was measured using a hyperpure germanium low energy photon spectrometer (LEPS) in a good geometry employing a magnetic deflection method in the range 10-60 keV. The observed experimental spectrum after unfolding was compared wit the theoretical calculations of Knipp, Uhlenbeck an Bloch, Lewis and Ford and Ford and Martin. The measured spectral distribution was found to be close to KUB in the energy range 12-45 keV. The distribution beyond 45 keV takes a positive deviation from all the three theories. It may also be pointed out that the IB from this isotope has not been studied earlier and as such the results are considered new.

S. Mészáros

Papers

Internal bremsstrahlung in the allowed decay of 35S