ADOPTED LEVELS, GAMMAS for 11Be
Authors: J.H. Kelley, C.G. Sheu | Citation: Nucl. Physics A880, 88 (2012) | Cutoff date: 1-Jan-2011
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=11509.3 keV 5 | S(n)= 501.64 keV 25 | S(p)= 20164 keV 13 | Q(α)= -8321 keV 8 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 11Li β- decay:8.75 MS | B | 1H(11Li,11Be),2H(11Li,11Be) |
| C | 1H(11Be,11Be’) | D | 9Be(t,p) |
| E | 9Be(6He,α) | F | 9Be(12Be,G11BE) |
| G | 9Be(13C,11C) | H | 9Be(14N,12N) |
| I | 9Be(15N,13N) | J | 9Be(16O,14O) |
| K | 10Be(n,γ) | L | 10Be(d,p) |
| M | 11B(E,E’π+) | N | 11B(μ-,γ) |
| O | 11B(π-,γ) | P | 11B(n,p) |
| Q | 11B(d,2He) | R | 11B(t,3He) |
| S | 11B(7Li,7Be) | T | 12C(7Li,8B) |
| U | C(12Be,11Be) | V | 13C(6Li,8B) |
| W | 197Au(11Be,11Be’) | X | 208Pb(11Be,11Be’) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) |
| 0 | CDEFGH JKLMNOP STUVWX | 1/2+ | 13.76 s 7 % β- = 100 | |||
| 320.04 10 | A CDEFGH JKLMNO QRSTUVWX | 1/2- | 115 fs 10 % IT = 100 | 320.04 10 | 100 | E1 |
| 1783 4 | CDE GH J L STU | 5/2+ | 100 keV 10 % n ≈ 100 | |||
| 2654 10 | A CDE GH J M QRS UV | 3/2- | 206 keV 8 % n ≈ 100 | |||
| 3400 6 | A CD H J ST | 3/2- | 122 keV 8 % n ≈ 100 | |||
| 3889 1 | A CD J QRS | (3/2+,5/2-) | < 8 keV % n = ? | |||
| 3955 1 | A CD FGH S UV | 3/2- | 10 keV 5 % n = ? | |||
| 5255 3 | A CDE GH | 5/2- | 45 keV 10 % n = ? | |||
| 5400 | Q | |||||
| 5849 10 | D G | 1/2+ | 139 keV 17 % n = ? | |||
| 5980 40 | H | |||||
| 6050 40 | S | 320 keV 40 | ||||
| 6300 | Q | |||||
| 6510 50 | D | 120 keV 50 % n = ? | ||||
| 6705 21 | DE GH M | (7/2-) | 40 keV 20 % n = ? | |||
| 7030 50 | A D | (5/2-) | 0.30 MeV 10 % n = ? | |||
| 7100 | J Q | |||||
| 8020 20 | A | 3/2- | 230 keV 55 | |||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) |
| 8200 | Q | 3/2- | ||||
| 8813 25 | A DE GH | 3/2-,(9/2-) | 0.20 MeV 5 % n = ? | |||
| 9.4E3 5 | PQRS | 7.0 MeV 5 | ||||
| 9.6E3 | G M Q | |||||
| 10590 50 | A DE | 5/2- | 210 keV 40 % n = ? % α = ? | |||
| 10730 | GHI | (11/2-) | ||||
| 12000 | GH M PQ | |||||
| 13200? | Q | |||||
| 13600 | GHI | (13/2-) | ||||
| 16.30E3 10 | A M | 0.7 MeV 1 | ||||
| 17500 | M | |||||
| 18.19E3 14 | A G | 1.5 MeV 4 % n = ? % 3H = ? % α = ? | ||||
| 18.6E3? | G | (15/2-) | ||||
| 21.16E3 2 | B | 3/2- | 490 keV 70 | |||
| 21500 | G I | (17/2-) | ||||
| 25000 | G | (19/2-) |
E(γ): From level energy difference; recoil correction applied
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Additional Data |
| 320.04 | 1/2- | 115 fs 10 % IT = 100 | 320.04 10 | E1 | B(E1)(W.u.)=0.360 31 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 3889 | (3/2+,5/2-) | < 8 keV % n = ? | J: also see |>7/2 from 9Be(t,p). E(level): J: also see |>7/2 from 9Be(t,p). |
| 9.6E3 | Unweighted average of Ex=9.3 MeV from 9Be(13C,11C), Ex=9.4 MeV from 11B(e,e’π+) and Ex=10.2 MeV from 11B(d,2He). E(level): Unweighted average of Ex=9.3 MeV from 9Be(13C,11C), Ex=9.4 MeV from 11B(e,e’π+) and Ex=10.2 MeV from 11B(d,2He). | ||
| 13600 | (13/2-) | From 9Be(13C,11C). Also see 9Be(14N,12N) and 9Be(15N,13N). E(level): From 9Be(13C,11C). Also see 9Be(14N,12N) and 9Be(15N,13N). | |
| 21.16E3 | 3/2- | 490 keV 70 | T=5/2 From 1H(11Li,11Be) and 2H(11Li,11Be). E(level): From 1H(11Li,11Be) and 2H(11Li,11Be). |
| 21500 | (17/2-) | From 9Be(13C,11C) and 9Be(15N,13N). E(level): From 9Be(13C,11C) and 9Be(15N,13N). | |
| 25000 | (19/2-) | From 9Be(13C,11C). E(level): From 9Be(13C,11C). |