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NUCLEAR REACTIONS ZaNa,24,25, aeMg ' 27A1 ' as, ag, agsi ' alp, a2, s4S,35,31C1 ' 39, 41K, 4°Ca(p, •), E = 0.3--2.1 MeV; measured tr(Ep). Deduced resonance strengths. Natural targets of different chemical compounds.

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Levels of Cl below an excitation energy of 2.75 MeV have been studied with the reaction C13 (d,py) C13 at a deuteron bombarding energy of 3.1 MeV. y-ray branching ratios and Doppler-shift information were obtained from proton-y coincidence measurements using BaCl& targets enriched in Cl~. Excitation energies were determined from singles measurements, as well as from the coincidence studies for the 10 levels previously reported in this energy range. The J~=1+ level at 1942 keV, which is strongly excited in the p decay of S38 and which was not observed in Cl (d,p)C1 studies with a magnetic spectrograph, is also weakly populated. Excitation energies (in keV) and mean lives (in psec) for the lowest 10 levels are . The multipole strengths of the transitions linking these states with the 2 ground state and 5 first excited state lead in combination with the l" transfer values from previous (d,p) work to the following spin-parity assignments: J~(755) =3;

The performance of a Compton-suppression spectrometer is investigated for two different Ge crystals as central detector; a 126 cm3 Ge(Li) with a dead layer of 1.0 mm and a 90 cm3 HPGe with a dead layer of 0.22 mm. The thin dead layer HPGe gives a 32% improvement in the overall Compton suppression. Predictions of the influence of the dead-layer thickness by means of Monte Carlo calculations are in good agreement. The spectrometer is further tested with radioactive sources of **Y and t szEu and the in-beam reaction 24Mg + (45 MeV)160.