Abstract
The deuteron-helium differential cross sections presented in the preceding paper have been analyzed in terms of a dispersion formalism to classify energy levels of . A level at Mev is confirmed to be a single particle, , level. The broad anomaly extending from 3 Mev to the limit of observation, 4.62 Mev, cannot be analyzed in terms of a single level. Instead, it has been fitted with two single-particle levels, a level at Mev in and a level at 5.4±0.5 Mev. The level cannot be located more accurately because only the tail is visible at the bombarding energies available. All of the other two-level combinations have been ruled out. The assignments, (, , ), and locations of the levels agree with an intermediate coupling model which is close to the extreme. In the neighborhood of and above the resonance the usual hard-sphere phase shifts, which are always negative, cannot be used for the -wave. This result may indicate odd-parity states above the presently investigated energy region. For the other partial waves, hard-sphere phase shifts corresponding to radii anywhere from 3 to 5× cm were satisfactory, provided the reduced width of the ground state of was simultaneously varied from the Wigner limit to very small values.
- Received 27 December 1954
DOI:https://doi.org/10.1103/PhysRev.98.590
©1955 American Physical Society