ADOPTED LEVELS, GAMMAS for 26F
Authors: M.S. Basunia and A.M. Hurst | Citation: Nucl. Data Sheets 134, 1 (2016) | Cutoff date: 1-Feb-2016
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=18190 keV 80 | S(n)= 7.7×102 keV 11 | S(p)= 15.97×103 keV 14 | Q(α)= -15.80×103 keV 21 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 26F IT decay (2.2 MS) | B | 1H(27F,26FG) |
| C | 9Be(26Ne,N25F) | D | 12C(27Na,26FG) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) |
| 0.0 | AB D | 1+ | 8.2 ms 9 % β- = 100 % β-n = 13.5 40 | |||
| 643.4 1 | A | (4+) | 2.2 ms 1 % IT = 82 11 % β- = 18 11 % β-n = 12 8 | 643.4 1 | 100 | [M3] |
| 657 7 | B D | (2+) | 657 7 | 100 | ||
| 1.05E3 12 | C |
Jπ(level): From shell model calculations, except otherwise noted.
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 1.05E3 | In the decay spectrum, a broad peak was fitted considering a single resonance. Shell model calculations predict several unbound states. E(level): In the decay spectrum, a broad peak was fitted considering a single resonance. Shell model calculations predict several unbound states. |
| E(level) | E(gamma) | Comments |
| 643.4 | 643.4 | E(γ): Delayed transition. Not observed in coincidence with β transitions from ground state. |
| 657 | 657 | E(γ): From 2012St01 (27Na,26Fγ). Other: 665 12 (2004El10 - (27F,26Fγ)) |
Time-of-Flight spectrometer at the LAMPF accelerator (1995ReZZ)
Particle stability established in beryllium + 48Ca reactions (1979We10) and thorium + p reactions (1988Wo09).
Production cross section |J0.05 μb, measured in 40Ar fragmentation reaction of 9Be(40Ar,X), E=90A MeV - 2007No13. In 2006Kh08, cross section=2221 mb 52 at magnetic rigidity (Bρ)=2.753 Tm, E=42.03 MeV/u and cross section=2424 mb 71 at Bρ=2.575 Tm, E=36.69 MeV/u for Si(28Ne,X) and related reduced strong absorption radius <r02|>1.225 fm2 22 are measured. The later one is used to study the isospin dependence of the reduced strong absorption radius. Measured 26F production cross sections: σf=0.048 μb 15 from 40Ar fragmentation, E=1.06 GeV/u, on Be target (2000Oz01); 2003Oz01 reported fragmentation cross section from 40Ar, E=94 MeV/u, σf=0.001 μb 4 on Be target and σf=0.26 μb 8 on Ta target.
2001Oz03: Due to poor statistics, unable to determine the halo structure of 26F from the measured interaction cross section of 26F with C target.
2010Ro23: Measured one-neutron-removal cross section σ1n=110 mb 24.