Table 1.
Resonance parameters and uncertainties used in the 18F(p, α) reaction rate calculations.
| Eex | Ec.m. | Jπ | ANC or Γp | Γα |
|---|---|---|---|---|
| (MeV) | (keV) | (fm−1/2 or keV) | (keV) | |
| 6.132(5) (a) | −278(5) | 1/2+, 3/2+ | ≤8 (b), ≤6 (b) | 8.6 (c) ∼16 (d), 0.74 (c) ∼8.5 (e) |
| 6.286(4) (f),(g) | −124(4) | 3/2+, 1/2+ | 59 (h), 83.5 (h) | 1.00 (c) ∼11.6 (e), 11.7 (c) ∼16 (d) |
| 6.416 (b), 6.423 (g) | 6, 13 | (3/2+) | ≤4.2 × 10−45(b),(h), ≤3.9 × 10−29(g),(h) | ≤0.5 (c) |
| 6.742 (i) | 332 | 3/2− | 2.22 × 10−3(i) | 5.2 (c) |
| 7.0747 (j) | 664.7 | 3/2+ | 15.2 (j) | 23.8 (j) |
| 7.79(3) (b) | 1380(30) | 1/2+ | 83 (b),(k) |
47 (b),(k) |
Notes. The asymptotic normalization coefficient (ANC) is used for subthreshold states (Ec.m. < 0), and the proton partial width, Γp, is used otherwise. Firmly tabulated values were not varied in the present work. In the case of values separated by a comma, corresponding quantities are tabulated in the same order throughout a row. For the Eex = 7.79 MeV state, we fixed the total width to 130(10) keV, allowing Γp and Γα to vary up and down, with a minimum of 1 keV each when the other absorbs the rest of the width. See the text and Fig. 1.
References. (a)Laird et al. (2013); (b)Kahl et al. (2019); (c)Bardayan et al. (2005), Nesaraja et al. (2007); (d)Torresi et al. (2017); (e)La Cognata et al. (2019); (f)Parikh et al. (2015); (g)Hall et al. (2019); (h)Adekola et al. (2011a,b); (i)Bardayan et al. (2002); (j)Bardayan et al. (2001); (k)Adekola et al. (2012).
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