SCATTERING OF 80 MEV $pi$$sup -$ MESONS BY COMPLEX NUCLEI (thesis)
Technical Report
·
OSTI ID:4299160
The elastic scattering of 80 Mev pi /sup -/ mesons by lithium, carbon, aluminum, and copper hns been investigated using a new pi /sup -/ detector which gives greatly improved discriminntion against low energy-loss inelastic events. A transmission'' scatterer orientation was necessary to maintain energy resolution, so only less than 120 deg scattering was studied. The new differential scattering cross sections for lithium, aluminum, and copper agree with previously reported results at small angles but are 2 to 10 times smaller at larger angles. There are indicatione of diffraction structure in aluminum and copper which were not previously observed due to the poorer energy resolution of the earlier measurements. lncluding the incident beam energy spread, the detector sensitivity is down by factors of 3 and 9 for E plus or minus 5.0 Mev and E plus or minus 10 Mev when peaked for mean energy E. This was used to separate the scattering from carbon into elastic and inelastic components for excitation of the 4.43 and the (7.65 and 9.61) Mev levels. Inelastic scatterings from lithium have also been studied. A comparison is made between the inelastic meson scattering results and the inelastic scattering of other particles, particularly electrons. The elastic scattering is compared with the results of complex square well phase shift calculations. (auth)
- Research Organization:
- Columbia Univ., Irvington-on-Hudson, N.Y. Nevis Cyclotron Labs.
- NSA Number:
- NSA-12-004510
- OSTI ID:
- 4299160
- Report Number(s):
- NEVIS-48; CU-137-57-ONR-110-1-
- Country of Publication:
- United States
- Language:
- English
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