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GENERAL: See also (1971AJ02) and Table 17.20 [Table of Energy Levels] (in PDF or PS).

Theory and reviews: (1971HA1Y, 1973HA77, 1973RE17, 1975BE31).

Mass of ¹⁷Ne: The mass excess of ¹⁷Ne, determined from a measurement of the Q-value of ²⁰Ne(³He, ⁶He)¹⁷Ne is 16.48 ± 0.05 MeV (1970ME11, 1972CE1A). Then ¹⁷Ne - ¹⁷F = 14.53 MeV and E_b for p, ³He and α are, respectively, 1.50, 6.46 and 9.05 MeV. See also (1971AJ02).

1. (a) 17Ne(β+)17F* → 16O + p	Qm = 13.93
(b) 17Ne(β+)17F	Qm = 14.53

The half-life of ¹⁷Ne is 109.0 ± 1.0 msec (1971HA05). Earlier values (see (1971AJ02)) gave a mean value of 108.0 ± 2.7 msec. The decay is primarily to the proton unstable states of ¹⁷F at 4.70, 5.52 and 6.04 MeV with J^π = 3/2^-, 3/2^- and 1/2^-, respectively: see Table 17.21 (in PDF or PS). The super-allowed decay to the analog state [¹⁷F*(11.20)] has log ft = 3.29^+0.04_-0.07. The character of the decay leads to J^π = 1/2^- for ¹⁷Ne_g.s. (1971HA05). See Table 17.3 (in PDF or PS) for a comparison of the mirror ¹⁷N and ¹⁷Ne decays (1976AL02) and Table 17.11 (in PDF or PS) for the decay of ¹⁷F*(11.20). See also (1971HO1D, 1972TO03; theor.).

2. 20Ne(3He, 6He)17Ne

Qm = -26.19

At E(⁶He) = 62.6 MeV, ⁶He groups are observed to ¹⁷Ne*(0, 1.35, 1.84, 2.77, 3.70, 5.28) [from Fig. 3 in (1972CE1A)]. See also (1970WO1D).