Abstract
Cross sections for the radiative capture of tritons by have been measured in the incident energy range 0.8 to 3.3 MeV and found to be of order 200-300 nb/sr. The 90° excitation functions exhibit resonant structures for the transitions to the ground state of and the (0.87-MeV) first excited state. Multilevel -matrix fits of both excitation functions and angular distributions, on the assumption that dipole transitions dominate, permit assignments for the observed resonances to be limited to a very few possibilities; the best fit results, which are also most consistent with other relevant arguments, give the most likely assignments , , , and for states at 19.76, 20.39, 20.58, and 21.05 MeV, respectively, although the parities cannot be individually ascertained. The lower limit for the radiative widths ranges from 1 to 6 eV. An additional level also appears to be present at ∼19.3 MeV.
NUCLEAR REACTION (,), MeV; measured , deduced levels, , , . , . . Natural nitrogen target.
- Received 30 October 1979
DOI:https://doi.org/10.1103/PhysRevC.21.791
©1980 American Physical Society