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Author Martoff, C. J. ♦ Hanna, S. S. ♦ Pocanic, D. ♦ Wang, K. ♦ Cummings, W. J. ♦ Byrd, R. C. ♦ Foster, C. C.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ CARBON 13 TARGET ♦ NEUTRON REACTIONS ♦ CROSS SECTIONS ♦ BORON 13 ♦ PROTONS ♦ MEV RANGE 100-1000 ♦ GROUND STATES ♦ SPIN ♦ ISOSPIN ♦ NUCLEON-NUCLEON INTERACTIONS ♦ DISTORTED WAVE THEORY ♦ IMPULSE APPROXIMATION ♦ ANGULAR DISTRIBUTION ♦ BETA DECAY
Abstract Cross sections at six angles between 0{degree} and 19{degree} in the center-of-mass system have been measured for the ground-state transition in the reaction {sup 13}C({ital n},{ital p}){sup 13}B at {ital E}{sub {ital n}}=118 MeV. The 0{degree} cross section gives a value of 186{plus_minus}25 MeVfm{sup 3} for the volume integral of the spin-isospin component of the central part of the effective {ital N}-{ital N} interaction. The theoretical value is 161 MeVfm{sup 3} at 100 MeV. A distorted-wave impulse-approximation calculation for the angular distribution of the ground-state transition, (1/2{sup {minus}},1/2) to (3/2{sup {minus}},3/2), compares well with the measurement. The 0{degree} measurement is compared with other ({ital n},{ital p}) and ({ital p},{ital n}) measurements on {sup 6}Li, {sup 12}C, and {sup 13}C to test the universal proportionality of these cross sections to the inverse {beta} decay. A falloff in the proportionality constant in going to low energy is confirmed. {copyright} {ital 1996 The American Physical Society.}
ISSN 05562813
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-11-01
Publisher Place United States
Journal Physical Review, C
Volume Number 54
Issue Number 5


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