COSMIC-RAY PRODUCED P-32 AND P-33 IN CL, S AND K AT MOUNTAIN ALTITUDEAND CALCULATION OF OCEANIC PRODUCTION-RATES

The activities of P-32 and P-33 induced in Cl, S and K targets during exposure to cosmic rays were measured at Mt. Washington (55.7-degrees- N, 1917 m) allowing the in situ production rates of the nuclides to be determined in all the major ocean targets. Furthermore, the productio n rates of P-32 and P-33 in Cl, the major ocean target, were determine d at three different altitudes in the atmosphere at Woods Hole (53-deg rees-N, 10 m), Mt. Washington and l'Aiguille du Midi (47.4-degrees-N, 3820 m). The exponential attenuation length of the production rates of P-32 was found to be consistent with the attenuation length of neutro ns in the lower atmosphere at mid-latitudes. The data allow the in sit u oceanic production rates of the nuclides to be estimated at all lati tudes.