ADOPTED LEVELS for 15F
Authors: J. Kelley, T. Truong, C.G. Sheu | Citation: ENSDF | Cutoff date: 17-JULY-2016
Full ENSDF file | Adopted Levels (PDF version)
| S(n)= 2.323×104 keV 8 | S(p)= -1.51×103 keV 7 | Q(α)= -9.92×103 keV 8 | |||
| Reference: 2012WA38 |
| References: | |||
| A | 1H(14O,p):NSCL | B | 1H(14O,p):Texas |
| C | 1H(14O,p):LBNL | D | 1H(14O,p):GANIL |
| E | 9Be(16Ne,15F) | F | 16O(14N,15C) |
| G | 20Ne(3He,8Li):NSCL | H | 20Ne(3He,8Li):LBNL |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0 | ABCDEFGH | 1/2+ | 660 keV 20 % p = 100 |
| 1.52E3 5 | ABCDEFGH | 5/2+ | 300 keV 13 % p = 100 |
| 3.48E3 4 | DEF | 1/2- | 36 keV 15 % p = 100 |
| 5.1E3 2 | EF | (3/2-,5/2-) | 0.2 MeV 2 % p = 100 |
| 6.5E3 2 | E | (3/2+,5/2+) | 0.4 MeV 4 % p = 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 1/2+ | 660 keV 20 % p = 100 | E(p+14O)cm (keV)=1.28×103 4. |
| 1.52E3 | 5/2+ | 300 keV 13 % p = 100 | E(p+14O)cm (keV)=2798 24. |
| 3.48E3 | 1/2- | 36 keV 15 % p = 100 | E(p+14O)cm (keV)=4757 12. |
| 5.1E3 | (3/2-,5/2-) | 0.2 MeV 2 % p = 100 | Γp=0.2 2 (2009Mu09,2010Mu12) E(p+14O)cm (keV)=6.4×103 2. |
| 6.5E3 | (3/2+,5/2+) | 0.4 MeV 4 % p = 100 | Γp=0.4 4 (2009Mu09,2010Mu12) E(p+14O)cm (keV)=7.8×103 2. |
Highlighted theoretical analyses:
2011Fo02: Reanalyzed data on 15C levels populated in 13C(t,p)15C and interpreted results to revise predictions on 15F levels.
2010Mu03: Parameters of the lowest Jπ=1/2+ and 5/2+ states were analyzed via the S-matrix pole method.
2015Gr04: Analysis, which focused on 16Ne, found the 15F ground state should lie near Eres(p+14O)=1.39 to 1.42 MeV.
2006Ca08, 2015Fr04: Analyzed the 14C+n system and then used multichannel algebraic scattering theory to predict resonances in the mirror 15F nucleus. See also 2007Ca31.
2005Ba73: α microscopic cluster model was developed that was tuned to the 14C+n system and used to predict the 14O+p scattering reaction and 15F resonances. Results are compared and found in agreement with an R-matrix analysis of experimental observations.
2005Fo10: The lowest t=3/2 and Jπ=1/2+ and 5/2+ states of the α=15 quartet are analyzed in a (0+2)h|w shell model.
2006Fo16: The definition of resonance energy is explored by considering three different parameters that may define the position: "(a) the energy at which the appropriate cross section peaks, (b) the energy at which the nuclear phase shift has the value δ=π/2, and (c) the energy at which the magnitude of the internal wave function or the derivative of the phase shift dδ/dE is a maximum. " Then, discussion on various α=15 and 16 states and analysis of the IMME mass relation are used to constrain predicted values for poorly known 15O, 15F and 16F states.
General theoretical analyses:
Other theoretical analyses relevant to 15F include general calculations on mass and structure properties in (1978Gu10,1993Po11,2008Qi04,2013Ci04). More detailed analyses considering pairs of mirror nuclides, Coulomb shifts, Thomas-Ehrman shifts and other detailed relationships are found in (1988Co15,1995Fo18,1997Gr18,1999Og11,1999Ts06,2013Fo22).
Other experimental results:
15F is not strongly populated in 12C(3He,π-) reactions at E(3He)=283 MeV (1986Mi25) or 235 MeV (1984Bi08).