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Author Wang, K. ♦ Martoff, C. J. ♦ Pocanic, D. ♦ Hanna, S. S. ♦ Brady, F. P. ♦ Romero, J. L. ♦ Castaneda, C. M. ♦ Drummond, J. R. ♦ McEachern, B. ♦ Sorenson, D. S.
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 10-100 ♦ GROUND STATES ♦ EXCITED STATES ♦ SPIN ♦ ISOSPIN ♦ NUCLEON-NUCLEON INTERACTIONS ♦ IMPULSE APPROXIMATION ♦ DWBA ♦ ANGULAR DISTRIBUTION ♦ GAMOW-TELLER RULES ♦ GIANT RESONANCE ♦ ELECTRIC DIPOLES
Abstract The reaction {sup 13}C({ital n},{ital p}){sup 13}B has been studied at {ital E}{sub {ital n}}=65 MeV. Cross sections were measured for transitions to the ground state and excited states of {sup 13}B from 0{degree} to 40{degree}. The 0{degree} cross section to the ground state gives a value of 179{plus_minus}20 MeVfm{sup 3} for {ital V}{sub {sigma}{tau}}{sup {ital c}}, the spin-isospin central part of the volume integral of the effective {ital N}-{ital N} interaction. A theoretical calculation, 181.3 MeVfm{sup 3}, is in good agreement with this result. Distorted-wave impulse-approximation calculations are compared with the experimental angular distributions. Good agreement is obtained for the dominant Gamow-Teller transition to the ground state of {sup 13}B. The evidence obtained here, together with results from the analogous reaction {sup 13}C({pi}{sup {minus}},{gamma}){sup 13}B, suggests that transitions to states at 6.5 and 7.6 MeV are spin dipole in character and that the broad resonance at 10.2 MeV is chiefly the analog of the giant {ital E}1 resonance in {sup 13}C. {copyright} {ital 1996 The American Physical Society.}
ISSN 05562813
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-04-01
Publisher Place United States
Journal Physical Review, C
Volume Number 53
Issue Number 4


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