Production of argon isotopes by spallation of Sc, Ti, Fe, Co, Ni, and Cu

Details Production of argon isotopes by spallation of Sc, Ti, Fe, Co, Ni, and Cu Production of argon isotopes by spallation of Sc, Ti, Fe, Co, Ni, and Cu

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979phrvc..20.1517r&link_type=abstract

Physical Review C (Nuclear Physics), Volume 20, Issue 4, October 1979, pp.1517-1527

Physics

Nuclear Physics

13

Scientific paper

Spallation ratios and production cross sections of 36,38,39,42Ar have been measured for the interaction of 0.080, 0.150, 0.600, 1.05, and 24 GeV protons with scandium, titanium, iron, cobalt, nickel, and copper. Argon is measured by means of a 60° 12 cm radius mass spectrometer, equipped with a gas extraction line and a calibration system. Precision is 1 to 5% for isotope ratios, and 10 to 20% for the cross sections. With regard to spallation reactions, some systematic effects are shown or confirmed. Excitation functions go through a maximum at high energy, then drop asymptotically to a constant value. The ratio of maximum to asymptote cross sections is about 1.6. The spallation ratios depend linearly on the (NZ)T ratios of the target and there is probably a linear correlation between the position of the peak of the spallation distribution and the (NZ)T ratio. Experimental values are compared with semiempirical fits and some astrophysical implications are discussed. NUCLEAR REACTIONS Spallation; targets Sc, Ti, Fe, Co, Ni, Cu; protons 0.080, 0.150, 0.600, 1.05, 24 GeV; measured σ for formation of 36, 38, 39, 42Ar; mass spectrometry; σ compared with semiempirical calculations; astrophysical implications.

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