ADOPTED LEVELS for 8He
Authors: D.R. Tilley, J.H. Kelley, J.L. Godwin, D.J Millener Et Al. | Citation: Nucl. Physics A745, 155 (2004) | Cutoff date: 31-Mar-2004
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=10663.88 keV 10 | S(n)= 2535 keV 8 | S(p)= 2.48×104 keV SY | |||
| Reference: 2012WA38 |
| References: | |||
| A | 1H(8He,8He) | B | 9Be(π-,p) |
| C | 9Be(7Li,8B) | D | 9Be(9Be,10C) |
| E | 9Be(13C,14O) | F | 10Be(12C,14O) |
| G | 11B(π-,PD) | H | 11B(7Li,10C) |
| I | 12C(8He,6He2N) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0.0 | ABCDEFGH | 0+ | 119.1 ms 12 % β- = 100 % β-n = 16 1 |
| 3.1E+3 5 | A CDEF HI | 2+ | 0.6 MeV 2 % n ≈ 100 % α ≤ 5 |
| 4.36E+3 20 | B D FGHI | (1-) | 1.3 MeV 5 % n ≈ 100 |
| 6.03E+3 10 ? | F | 0.15 MeV 15 | |
| 7.16E+3 4 | C F | (3-) | 0.1 MeV 1 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 0+ | 119.1 ms 12 % β- = 100 % β-n = 16 1 | T=2 %β- 3H=0.9 1 (2003Au02, 1986Bo41). E(level): %β- 3H=0.9 1 (2003Au02, 1986Bo41). |
| 4.36E+3 | (1-) | 1.3 MeV 5 % n ≈ 100 | This state may represent a group of levels. α broad resonance is observed at 4.4 MeV in 9Be(π-,p), 11B(π-p) and 12C(8He,6He2n); a narrow resonance is observed at 4 MeV in 9Be(9Be,10C) and 11B(7Li,10C) and a narrow resonance is observed at 4.54 MeV in 10Be(12C,14O). E(level): This state may represent a group of levels. α broad resonance is observed at 4.4 MeV in 9Be(π-,p), 11B(π-p) and 12C(8He,6He2n); a narrow resonance is observed at 4 MeV in 9Be(9Be,10C) and 11B(7Li,10C) and a narrow resonance is observed at 4.54 MeV in 10Be(12C,14O). |