An analysis has been made of gamma rays from the Large Magellanic Cloud (LMC) using data from the Compton Gamma Ray Observatory. After correcting for foreground gamma rays from cosmic ray (CR) interactions in our own Galaxy it is found that the gamma ray intensity maps show a displacement of peak position away from the peak of the atomic gas contours and towards the peak of the starlight contours. An explanation is advanced in terms of there being an increasing contribution from inverse Compton interactions, this contribution being bigger the higher the energy.Our earlier contention that the average cosmic ray intensity within the LMC is only about 15% of that in the Galaxy is confirmed.

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A gas scintillation proportional chamber has been built to investigate its behaviour as a high-intensity low-energy X-ray detector using a gas mixture of argon and nitrogen. An X-ray source (55Fe) and an alpha -particle source (241Am) have been used to test the chamber. The scintillation pulse height has been studied for several anode voltages and for various concentrations of nitrogen. The maximum scintillation light output has been obtained for a nitrogen concentration of 2%. The energy resolution of 32.5% has been obtained using 5.9 keV X-rays for a gas multiplication factor of about 400. Very little change in the characteristics of the chamber have been observed up to rates of about 106 per second.

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