Abstract
The cross section of the p(n,{gamma})d reaction was directly measured for the first time at E{sub n}=550 keV, where the theoretical E1 transition strength is comparable to the M1 strength. It was determined accurately to be 35.2 (24) {mu}b, and it agrees with the theoretical one which includes the meson-exchange currents. In this work, a prompt discrete {gamma}-ray detection method combined with a pulsed neutron beam and a newly developed Monte Carlo code was essential to obtain an accurate cross section. {copyright} {ital 1997} {ital The American Physical Society}
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