Comparison ofH3andHe3Production in High-Energy Deuteron-Deuteron Collisions

The relative production of ${\mathrm{H}}^3$ and ${\mathrm{He}}^3$ from deuteron-deuteron collisions at 190 Mev has been measured at 30° (center of mass). The method of detection required that the particles traverse a magnetic channel and a pulse-height counter telescope. The pulses were displayed on a fast cathode-ray oscilloscope and recorded photographically. A liquid deuterium target was employed. The comparison shows a ratio of ${\mathrm{H}}^3$ to ${\mathrm{He}}^3$ of 0.86±0.14. These data support the hypothesis that charge symmetry of nuclear forces exists at high energy.