Abstract
The 7.02-MeV level of 20Ne has been studied by the I2C(12C, αγ)20Ne reaction, using angular correlation techniques, with a particle counter and six Nal crystals. The spin and parity of this level were determined to be 4−. The branching ratio of the decays to the 5.63, 4.97, and 4.25 MeV levels was found to be 22:65:13. The transition to the 5.63-MeV state (4− → 3−) is an almost pure E2 transition with an M1/E2 amplitude ratio of 0.03 ± 0.03. The branching ratio of the E2 transitions to the 5.63-MeV 3− level and the 4.97-MeV 2− level is in excellent agreement with predictions from the rotational model and also with SU3 calculations.Similar measurements on the 10.65-MeV level in 20Ne support the tentative 6− assignment to this level.
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