|
17N (1977AJ02)(See Energy Level Diagrams for 17N) GENERAL: See also (1971AJ02) and Table 17.1 [Table of Energy Levels] (in PDF or PS). Theory and reviews: (1973PA1F, 1973RE17, 1973TO16, 1973WI15, 1974HA61, 1975BE31). Experimental papers: (1971AR02, 1973KO1D, 1976DE1P).
The half-life of 17N is 4.169 ± 0.008 sec (1972AL42): the mean of earlier values (see (1971AJ02)) was 4.16 ± 0.01 sec. See also (1976FI03). The decay is principally [see Table 17.2 (in PDF or PS)] to the neutron unbound states 17O*(4.55, 5.38, 5.94) [Jπ = 3/2-, 3/2- and 1/2-, respectively]. The nature of the decay is in agreement with Jπ = 1/2- for 17Ng.s. (1973PO11, 1976AL02). For measurements of the neutron energies see (1973PO11). Excitation energies of 17O states have been determined by (1973PO11) from En [e.g., 4.552 ± 0.004 MeV] and by (1976AL02). From Eγ to the first excited state whose Ex was taken to be 870.8 ± 0.2 keV, Ex for the second excited state of 17O is 3055.2 ± 0.3 keV; the direct ground state decay of that state is < 1.5% (1976AL02). See also (1972SH1F) and (1972TO03; theor.). For a comparison of the 17N and 17Ne decays see Table 17.3 (in PDF or PS) (1976AL02): the large values of δ show the importance of final state nuclear asymmetry in odd-A nuclei. See also (1972AL42).
See (1976FI03).
Proton groups and γ-rays have been studied by several groups: see Tables 17.4 (in PDF or PS) and 17.5 (in PDF or PS). Angular distributions of γ-rays, branching ratio and lifetime measurements lead to most of the Jπ shown in these two tables; transition energies have also been very accurately determined (1974RO27, 1974RO28). See also (1971AJ02).
See (1961PE28).
See (1972EY01).
See (1971AJ02).
See 18O in (1978AJ03).
See 18O in (1978AJ03).
See 19O in (1972AJ02).
Angular distributions of eight 3He groups have been measured at Ed = 52 MeV; see Table 17.4 (in PDF or PS) (1971HA48).
Alpha particle groups corresponding to 17N states with Ex < 4.3 MeV have been studied by (1960JA13): see Table 17.3 (in PDF or PS) in (1971AJ02). (1976GU14: Et = 3.5 MeV) have studied α - γ angular correlations and γ-branching ratios for the first six excited states of 17N: see Tables 17.4 (in PDF or PS) and 17.5 (in PDF or PS).
|