Abstract-The production rates of 32P in rhombic sulfur were measured at various altitudes from sea level up to the top of Mt. Fuji. The production rate decreases exponentially with increasing atmospheric depth and the dependence indicates that neutron reaction is predominant in the 32P production. From an underground experiment, the contribution of muons to the production of 32P was estimated and the result was compared with relevant data.

Radioactivity 59 Ni [from 59 Co(p, n)] /Measured Τ 1 β/Mass spectroscopy /X-ray/X-y coincidence /Enriched isotope SummaryThe absolute activity of a sample of the long-lived nuclide 59 Ni, produced from cobalt by 17 MeV protons, was measured using a Xe-filled X-ray counter; the number of 59 Ni atoms was determined by isotope dilution mass-spectrometry. A value of (7.6± 0.5)X 10 4 y for the half-life of S9 Ni was determined from the specific activity.

An anomaly in the isotopic composition of lithium has been searched for in the Allende meteorite. White inclusions, a chondrule and the matrix of Allende were analysed and compared with terrestrial standard rocks and with the meteoritic standards of St. Severin, Peace River and Bruderheim. No anomaly of 7Li/6Li was observed in any of the Allende samples.

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