Dominance of the two-nucleon mechanism inO16(π+,pp) at 115 MeV
| العنوان: | Dominance of the two-nucleon mechanism inO16(π+,pp) at 115 MeV |
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| المؤلفون: | N. S. Chant, H. Breuer, Th. S. Bauer, B. G. Ritchie, F. Khazaie, P. A. Amaudruz, Dieter Renker, R. A. Schumacher, C. H. Q. Ingram, S. D. Hyman, P. G. Roos, J. D. Silk, D. J. Mack, W. J. Burger, G. S. Kyle, U. Sennhauser |
| المصدر: | Physical Review C. 45:1767-1783 |
| بيانات النشر: | American Physical Society (APS), 1992. |
| سنة النشر: | 1992 |
| مصطلحات موضوعية: | Baryon, Physics, Nuclear reaction, Nuclear and High Energy Physics, Hadron, Absorption cross section, Elementary particle, Atomic physics, Nucleon, Charged particle, Spectral line |
| الوصف: | Singles {sup 16}O({pi}{sup +},{ital p}) and coincidence {sup 16}O({pi}{sup +},2{ital p}){sup 14}N measurements have been made at {ital T}{sub {pi}}=115 MeV over an extended range of the phase space of the two final-state protons. The coincidence measurements have a missing-mass resolution of 4 MeV. The direct two-nucleon absorption cross section extracted from the data is 58{plus minus}8 mb. After corrections for final-state interactions, it was found that the two-nucleon {pi}{sup +}+{ital np}{r arrow}{ital pp} process accounts for about 76% of the total absorption cross section, and thus is the dominant absorption mechanism. Evidence for absorption on {ital s}-{ital p} pairs is seen as a broad bump near 32 MeV of excitation. At backward angles the inclusive {sup 16}O({pi}{sup +},{ital p}) spectra show a distinct absorption peak, an important feature not previously observed. Comparisons of distorted wave impulse approximation calculations to both the coincidence data and inclusive data are presented. |
| تدمد: | 1089-490X 0556-2813 |
| DOI: | 10.1103/physrevc.45.1767 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::4eed7f5bdd39aec5d01739e25fdcc2c5 https://doi.org/10.1103/physrevc.45.1767 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........4eed7f5bdd39aec5d01739e25fdcc2c5 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1089490X 05562813 |
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| DOI: | 10.1103/physrevc.45.1767 |