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USNDP

16Ne (1982AJ01)


(See the Isobar Diagram for 16Ne)

GENERAL: See also (1977AJ02) and Table 16.27 [Table of Energy Levels] (in PDF or PS).

Theoretical work: (1978GU10, 1978SP1C, 1981LI1M).

Reviews: (1977CE05, 1979AL1J, 1980TR1E).

Mass of 16Ne: The Q-values of the 20Ne(α, 8He) and 16O(π+, π-) reactions lead to an atomic mass excess of 24.02 ± 0.04 MeV for 16Ne. 16Ne is then unbound with respect to decay into 14O + 2p by 1.43 MeV and is bound with respect to decay into 15F + p by 0.04 MeV.

1. 16O(π+, π-)16Ne Qm = -28.76
Q0 = -28.785 ± 0.045 MeV (1980BU15).

At Eπ+ = 180 MeV 16Neg.s. is populated. The cubic factor, d, in the IMME is calculated to be 2.5 ± 3.7 keV based on Q0 (1980BU15). See also (1977HO13, 1978BU09, 1980MI05, 1981GR1J, 1981GR1K).

2. 20Ne(α, 8He)16Ne Qm = -60.23
Q0 = -60.15 ± 0.08 MeV.

At Eα ≈ 117.5 MeV, 16Ne*(0, 1.69 ± 0.07) are populated, the former with a differential cross section of 5 ± 3 nb/sr at 8°(lab). The Γc.m. for the ground state group is 200 ± 100 keV; applying penetrability corrections leads to a total decay width of 5 - 100 keV. The di-proton branching ratio is 10 - 90%, with the most probable value being 20%. The cubic term, d, in the IMME is 8 ± 5 keV, 15 ± 6 keV based, respectively, on the masses of 16Ne*(0, 1.69). The first T = 2 states in 16F [0+, 2+] are predicted to lie at Ex = 10.08 ± 0.02 and 11.87 ± 0.03 MeV (1978KE06).