Search for Resonance Structure in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>np</mml:mi></mml:math>Total Cross Section below 800 MeV

Abstract

The $\mathrm{np}$ total cross section has been measured from 40 to 770 MeV with good statistical precision and better than 1% energy resolution. No evidence is seen for narrow resonances with areas greater than 5 mb MeV or for the $I=0$, $^{1}F_{3}$ state reported by other authors. From 200 to 700 MeV the present results are as much as 6% lower than previous data.