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USNDP

17Ne (71AJ02)


(See the Isobar Diagram for 17Ne)

GENERAL: See also Table 17.22 [Table of Energy Levels] (in PDF or PS).

Theory: (WI64E, MA65J, MA66BB).

Reviews: (BA60Q, GO60P, BA61F, GO62N, GO64J, GO66J, GO66L, MC66E, CE68A, GA69M).

Mass of 17Ne: M - A, determined from the Q-value of the 20Ne(3He, 6He)17Ne reaction, is 16.479 ± 0.050 MeV (ME70E). See also (ES67). Then 17Ne - 17F = 14.53 MeV and Eb for p, 3He and α are, respectively, 1.50, 6.46 and 9.05 MeV. [Eb for an α-particle is calculated using the mass of (ME70E) for 13O.] The mass of 17Ne predicted from mass formulae are M - A = 16.508 ± 0.023 MeV (ME70E), 16.517 ± 0.026 MeV (CE68A), 16.63 MeV (KE66C). See also (WI64E, JA65C).

1. 17Ne(β+)17F* --> 16O + p

The half-life of 17Ne is 102 ± 7 msec (MC64F), 105 ± 5 msec (ES67), 107 ± 5 msec (FI67H), 115 ± 5 msec (HA69N): the mean value is 108.0 ± 2.7 msec. See also (FL64A, FL64B, HA65I). The decay is primarily to proton unstable states of 17F at Ex = 4.69, 5.52 and 6.04 MeV, with Jπ = 3/2-, 3/2- and 1/2-, respectively: see Table 17.23 (in PDF or PS) (ES67, HA69N). The super-allowed decay to the analog state [17F*(11.20)] has log ft = 3.35 ± 0.10 (HA69N). The character of the decay leads to Jπ = 1/2- for 17Ne(0). See also (BA63T, VL63, DA64B, HA65F, MA65J, MI65C, HA66K).

2. 20Ne(3He, 6He)17Ne Qm = -26.187

At E(3He) = 62 MeV, 6He groups are observed to five states of 17Ne: see Table 17.22 (in PDF or PS) (R. Mendelson, J.M. Loiseaux, G. Wozniak and J. Cerny, private communication).