PION CAPTURE IN COMPLEX NUCLEI
The effect of the finite lifetime of pion-nucleon resonances (isobars) on intranuclear cascades is considered. the existence of these isobars inside the nucleus must be postulated if the impulse approximation is valid for intranuclear cascades involving pions. These isobars may interact with neighboring nucleons before decaying. One such interaction provides a mechanism for the capture of highenergy pions. Assuming the impulse approximation to be valid for isobar- nucleon interactions, the cross section for the capture of a high-energy pion by two nucleons inside the nucleus is estimated. Since this is a pion-nucleon cross section, an intranuclear cascade calculation must be made before the pion-nucleon capture cross section can be obtained and compared with experiment. However, the same mechanism should also hold in the capture of high-energy pions in deuterium. Here the calculated cross section is in satisfactory agreement with the experiment. (auth)
- Research Organization:
- Brookhaven National Lab., Upton, N.Y.
- NSA Number:
- NSA-17-026577
- OSTI ID:
- 4694433
- Report Number(s):
- BNL-6617; 0031-899X
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D; ISSN PHRVA
- Country of Publication:
- United States
- Language:
- English
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