Polyethylene, water, lithium fluoride, aluminium, and sulfur targets have been irradiated with 1-GeV bremsstrahlung beams at the Frascati electron synchrotron and the yields of some spallatjon products from Al and S and of C and VBe from C, 60, 9F, Al, and S have been measured by the induced-activity and radiochemical methods. Evidence has been deduced for fragmentation from the mass-yield distribution of the photoproduced nuclides in 27Al and S
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