H.W. Taylor

States in 53Mn from the 52Cr(p, γ)53Mn reaction

Abstract Eight resonances have been observed in the 52 Cr(p, γ) 53 Mn reaction between E p = 0.90 and 1.03 MeV. Gamma-ray spectra have been accumulated at four of the resonances. Spin assignments have been made to the resonant states on the basis of the measured angular distributions of primary γ-rays. Excitation energies and γ-ray branching ratios have been determined for 36 levels between 2.0 and 5.6 MeV. Mean lives for nine of the states have been extracted by the Doppler shift attenuation method.

Levels in 44Ca excited by the β-decay of 44K

Abstract The β-decay of 22 min 44 K has been re-investigated with a Ge(Li) spectrometer of improved resolution and efficiency. A total of 58 γ-rays has been assigned to the decay of 44 K. Of these 53 have been incorporated into a revised decay scheme containing 20 excited states. The 44 K half-life was determined to be 22.15 ± 0.20 min.

The half life of 76Ga

76Ga was produced through the reaction 76Ge(n,p)76Ga using 14-MeV neutrons. The half life of 76Ga was determined to be 32.6±0.6s.

Levels in 44 Ca excited by the β-decay of 44 K

Abstract The β-decay of 22 min 44 K has been re-investigated with a Ge(Li) spectrometer of improved resolution and efficiency. A total of 58 γ-rays has been assigned to the decay of 44 K. Of these 53 have been incorporated into a revised decay scheme containing 20 excited states. The 44 K half-life was determined to be 22.15 ± 0.20 min.

A comment on γ-γ directional correlation measurements in even-even nuclei

Abstract A method for using 4(2)2(2)0 and 0(2)2(2)0 spin sequences to produce reference correlations for directional correlation measurements in even-even nuclei is outlined.

The radiative neutron capture facility at the University of Toronto

Abstract A description is given of the facility for performing resonance-neutron radiative-capture experiments at the University of Toronto linac laboratory. The shape of the neutron spectrum produced by bremsstrahlung on tungsten plates in the thermal and resonance energy region is presented. Investigations of the “γ-flash” accompanying the neutron bursts reveal a large component due to annihilation radiation. As an example of system performance, the results from neutron capture in 197 Au are displayed.