Dominance of the two-nucleon mechanism in O16(+,pp) at 115 MeV

D. J. MacK; P. G. Roos; H. Breuer; N. S. Chant; S. D. Hyman; F. Khazaie; B. G. Ritchie; J. D. Silk; G. S. Kyle; P. A. Amaudruz; Th S. Bauer; C. H.Q. Ingram; D. Renker; R. A. Schumacher; U. Sennhauser; W. J. Burger

doi:10.1103/PhysRevC.45.1767

Dominance of the two-nucleon mechanism in O16(+,pp) at 115 MeV

D. J. MacK, P. G. Roos, H. Breuer, N. S. Chant, S. D. Hyman, F. Khazaie, B. G. Ritchie, J. D. Silk, G. S. Kyle, P. A. Amaudruz, Th S. Bauer, C. H.Q. Ingram, D. Renker, R. A. Schumacher, U. Sennhauser, W. J. Burger

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Abstract

Singles O16(+,p) and coincidence O16(+,2p)14N measurements have been made at T=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±8 mb. After corrections for final-state interactions, it was found that the two-nucleon ++nppp process accounts for about 76% of the total absorption cross section, and thus is the dominant absorption mechanism. Evidence for absorption on s-p pairs is seen as a broad bump near 32 MeV of excitation. At backward angles the inclusive O16(+,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.

Original language	English (US)
Pages (from-to)	1767-1783
Number of pages	17
Journal	Physical Review C
Volume	45
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.45.1767
State	Published - 1992
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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MacK, D. J., Roos, P. G., Breuer, H., Chant, N. S., Hyman, S. D., Khazaie, F., Ritchie, B. G., Silk, J. D., Kyle, G. S., Amaudruz, P. A., Bauer, T. S., Ingram, C. H. Q., Renker, D., Schumacher, R. A., Sennhauser, U., & Burger, W. J. (1992). Dominance of the two-nucleon mechanism in O16(+,pp) at 115 MeV. Physical Review C, 45(4), 1767-1783. https://doi.org/10.1103/PhysRevC.45.1767

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title = "Dominance of the two-nucleon mechanism in O16(+,pp) at 115 MeV",

abstract = "Singles O16(+,p) and coincidence O16(+,2p)14N measurements have been made at T=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±8 mb. After corrections for final-state interactions, it was found that the two-nucleon ++nppp process accounts for about 76% of the total absorption cross section, and thus is the dominant absorption mechanism. Evidence for absorption on s-p pairs is seen as a broad bump near 32 MeV of excitation. At backward angles the inclusive O16(+,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.",

author = "MacK, {D. J.} and Roos, {P. G.} and H. Breuer and Chant, {N. S.} and Hyman, {S. D.} and F. Khazaie and Ritchie, {B. G.} and Silk, {J. D.} and Kyle, {G. S.} and Amaudruz, {P. A.} and Bauer, {Th S.} and Ingram, {C. H.Q.} and D. Renker and Schumacher, {R. A.} and U. Sennhauser and Burger, {W. J.}",

year = "1992",

doi = "10.1103/PhysRevC.45.1767",

language = "English (US)",

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T1 - Dominance of the two-nucleon mechanism in O16(+,pp) at 115 MeV

AU - MacK, D. J.

AU - Roos, P. G.

AU - Breuer, H.

AU - Chant, N. S.

AU - Hyman, S. D.

AU - Khazaie, F.

AU - Ritchie, B. G.

AU - Silk, J. D.

AU - Kyle, G. S.

AU - Amaudruz, P. A.

AU - Bauer, Th S.

AU - Ingram, C. H.Q.

AU - Renker, D.

AU - Schumacher, R. A.

AU - Sennhauser, U.

AU - Burger, W. J.

PY - 1992

Y1 - 1992

N2 - Singles O16(+,p) and coincidence O16(+,2p)14N measurements have been made at T=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±8 mb. After corrections for final-state interactions, it was found that the two-nucleon ++nppp process accounts for about 76% of the total absorption cross section, and thus is the dominant absorption mechanism. Evidence for absorption on s-p pairs is seen as a broad bump near 32 MeV of excitation. At backward angles the inclusive O16(+,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.

AB - Singles O16(+,p) and coincidence O16(+,2p)14N measurements have been made at T=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±8 mb. After corrections for final-state interactions, it was found that the two-nucleon ++nppp process accounts for about 76% of the total absorption cross section, and thus is the dominant absorption mechanism. Evidence for absorption on s-p pairs is seen as a broad bump near 32 MeV of excitation. At backward angles the inclusive O16(+,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.

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JO - Physical Review C

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ER -

Dominance of the two-nucleon mechanism in O16(+,pp) at 115 MeV

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