ADOPTED LEVELS, GAMMAS for 25F
Authors: M. Shamsuzzoha Basunia, Anagha Chakraborty | Citation: Nucl. Data Sheets 205, 1 (2025) | Cutoff date: 31-May-2025
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=1.337×104 keV 10 | S(n)= 4.28×103 keV 14 | S(p)= 1.446×104 keV 19 | Q(α)= -1.632×104 keV 17 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 1H(27F,25F),BE(36S,X) | B | C(26Ne,25FG) |
| C | 9Be(26Ne,24F) | D | 9Be(29Na,25F) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | Final Levels | |
| 0.0 | AB | (5/2+) | 142.6 ms 12 % β- = 100 % β-n = 38 7 | ||||
| 1721 15 | B | (1/2+) | 1720 15 | 100 | 0.0 | (5/2+) | |
| 3090 80 | B | (9/2+) | 3090 75 | 100 | 0.0 | (5/2+) | |
| 3442 19 | AB | (3/2+) | 1720 15 3440 50 | 37 7 100 20 | 1721 0.0 | (1/2+) (5/2+) | |
| 3700 | A | 3700 | | 0.0 | (5/2+) | ||
| 3830 60 | B | (3/2+) | 2140 30 ? 3830 60 | | 1721 0.0 | (1/2+) (5/2+) | |
| 4180 30 | AB | (5/2+) | 735 22 4210 80 | 23 4 100 19 | 3442 0.0 | (3/2+) (5/2+) | |
| 4.31E3 14 | C | (1/2-) | < 20 keV | ||||
| 4.64E3 14 | BCD | (5/2+) | 73 keV 70 | ||||
| 4.85E3 14 | B | (1/2-) | 51 keV 49 | ||||
| 5450 60 ? | A C | ≈ 800 keV | 1753 53 | | 3700 | ||
| 5.83E3 18 | B | 2.50×103 keV 44 | |||||
E(level): From a least squares fit to the γ-ray energies, except where otherwise noted. For a level without depopulating γ, the level energy is from the particle dataset.
T1/2(level): LABEL=T1/2/Γr
T1/2(level): Γr, resonance width
E(γ): From C(26Ne,25Fγ), except where otherwise noted
I(γ): From C(26Ne,25Fγ)
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (5/2+) | 142.6 ms 12 % β- = 100 % β-n = 38 7 | <r2>1/2(25F)=3.12 fm 8 (matter radius) (2001Oz03). E(level): <r2>1/2(25F)=3.12 fm 8 (matter radius) (2001Oz03). |
| 1721 | (1/2+) | Jπ(level): Spin and parity assignments are based on shell model calculations and γ placements (2014Va02 - C(26Ne,25Fγ)). | |
| 3090 | (9/2+) | Jπ(level): Spin and parity assignments are based on shell model calculations and γ placements (2014Va02 - C(26Ne,25Fγ)). | |
| 3442 | (3/2+) | XREF: α(3300). Jπ(level): Spin and parity assignments are based on shell model calculations and γ placements (2014Va02 - C(26Ne,25Fγ)). | |
| 3700 | E(level): From 1H(27F,25F),Be(36S,x). | ||
| 3830 | (3/2+) | Jπ(level): Spin and parity assignments are based on shell model calculations and γ placements (2014Va02 - C(26Ne,25Fγ)). | |
| 4180 | (5/2+) | XREF: α(4430). Jπ(level): Spin and parity assignments are based on shell model calculations and γ placements (2014Va02 - C(26Ne,25Fγ)). | |
| 4.64E3 | (5/2+) | 73 keV 70 | T1/2(level): From C(26Ne,25Fγ). |
| 4.85E3 | (1/2-) | 51 keV 49 | T1/2(level): From C(26Ne,25Fγ). |
| 5450 | ≈ 800 keV | E(level): Proposed 5450 levels is tentative. T1/2(level): From (26Ne,24F). | |
| 5.83E3 | 2.50×103 keV 44 | E(level): From 1H(27F,25F),Be(36S,x). T1/2(level): From C(26Ne,25Fγ). |
| E(level) | E(gamma) | Comments |
| 3442 | 3440 | E(γ): other: 3300 (Be(36S,x) - 2002Az02) |
| 3700 | 3700 | E(γ): From 1H(27F,25F),Be(36S,x) |
| 4180 | 735 | E(γ): weighted average of 750 30 (26Ne,25Fγ) and 727 22 (27F,25F),Be(36S,X). |
Other studies:
1995ReZZ: Time-of-flight spectrometer at the LAMPF accelerator
1970Ar09: Particle stability established in 232Th(22Ne,X)
2007No13: Production cross section |J0.1 nb, measured in 40Ar fragmentation reaction of 9Be(40Ar,x), E=90 MeV/nucleon.
2006Kh08: Measured cross section=2256 mb 22 at magnetic rigidity (Bρ)=2.753 Tm, E=45.46 MeV/u and cross section=2300 mb 26 at Bρ=2.575 Tm, E=39.71 MeV/u for Si(28Ne,x) and related reduced strong absorption radius <r02>=1.236 fm2 9 are measured. The later one is used to study the isospin dependence of the reduced strong absorption radius.
Measured 25F production cross-section: σF=0.60 μb 18 from 40Ar fragmentation, E=1.06 GeV/u, on Be target (2000Oz01); 2003Oz01 reported fragmentation cross section from 40Ar, E=94 MeV/u, σF=0.40 μb 15 on Be target and σF=10.5 μb 31 on Ta target.
2012Zh06: Production cross sections |J0.001 mb and |J0.01 mb were measured in fragmentation of 9Be(40Ar,X) and 181Ta(40Ar,X), E=57 MeV/nucleon, respectively.
Q-value: S(2n)=8090.0 1000, S(2p)=39960 430, Q(β-n)=9.21×103 10 (2021Wa16)