Elastic scattering of pions from {sup 3}H and {sup 3}He into the backward hemisphere
- Center for Nuclear Studies, Department of Physics, The George Washington University, Washington, D.C. 20052 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Department of Physics, University of California, Los Angeles, California 90024 (United States)
- Department of Physics, Abilene Christian University, Abilene, Texas 79699 (United States)
- Rudjer Boskovic Institute, Zagreb (Croatia)
We have measured differential cross sections for the elastic scattering of charged pions from {sup 3}H and {sup 3}He into the backward hemisphere. Near the peak of the delta resonance, at {ital T}{sub {pi}}=180 MeV, an angular distribution covering 114{degree} to 168{degree} in the laboratory extends our earlier measurements. At {ital T}{sub {pi}}=142, 180, 220, and 256 MeV, we have measured an excitation function at angles approaching 170{degree}. The cross sections for the reactions {sup 3}He({pi}{sup +},{pi}{sup +}){sup 3}He, {sup 3}H({pi}{sup {minus}},{pi}{sup {minus}}){sup 3}H show a rise at back angles which is not seen for {sup 3}He({pi}{sup {minus}},{pi}{sup {minus}}){sup 3}He and {sup 3}H({pi}{sup +},{pi}{sup +}){sup 3}H. There is a dip in the cross sections near 130{degree} for {ital T}{sub {pi}}=180 MeV.
- DOE Contract Number:
- FG05-86ER40270; FG05-86ER40285
- OSTI ID:
- 44691
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 51; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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