Twenty energy levels in Al 27 have been found by the magnetic analysis of inelastically scattered protons at 90° from thin targets of aluminum. An analyzed beam of 8.0-Mev protons was utilized for the bombardment. Tentative values for the levels found are 0.
A scattering program at the University of Pittsburgh uses charged particles from the cyclotron (8-Mev protons, 16-Mev deuterons, and 32-mev alpha-particles). An electromagnet focuses the cyclotron beam through an aperture in an 8-ft shielding wall into a scattering laboratory; a second magnet analyzes the beam in energy; a third magnet analyzes the energy of the charged particles produced in the reaction. For 116−in. analyzing slits 1.0 microamperes of 8±0.010-Mev protons are available at the target 31 ft distant from the cyclotron. The reaction particle analyzer can be rotated about the target. The energy dispersion for 5.298-Mev alpha-particles is 0.192 Mev/in. for each analyzer; the momentum resolution is 1 part in 850. The detector is a scintillation counter. The energy determinations at present stage of development are thought to be accurate to ±0.2 percent ascribed to magnet calibration uncertainties. Energies above and below this value are thought to be of the same precision but the actual calibrations have not been completed.
Many military laboratories are today being subjected to increasingly severe requirements as this country seeks to emphasize its scientific effort. The immediate problems of defense, the missile program, and the now intense interest in the race for outer space, all call for trying to buy ten years time in two. The relatively calm environment of many military research laboratories is gradually being replaced by crash requirements, deadlines, and “budget hassles”. In such a situation research having generalized long-term objectives always seems to yield to the exigencies of the immediate.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.