ADOPTED LEVELS for 19Mg
Authors: J.H. Kelley, G.C. Sheu | Citation: ENSDF | Cutoff date: 1-Jan-2014
Full ENSDF file | Adopted Levels (PDF version)
| S(n)= 18.68×103 keV 11 | S(p)= 0.50×103 keV 12 | ||||
| Reference: 2012WA38 |
| References: | |||
| A | 9Be(36Ar,19Mg) | B | 9Be(20Mg,2P17NE) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) |
| 0 | B | 1/2- | 1.14×10-4 eV % 2p ≈ 100 |
| 1.38E3 24 | B | (3/2-) | 0.4 MeV 2 % p ≈ 100 |
| 2.14E3 21 | B | (5/2-) | 0.6 MeV 6 % p ≈ 100 |
| 2.84E3 21 | B | (3/2-) | < 0.2 MeV % p ≈ 100 |
| 4.74E3 21 | B | (3/2-) | 2.0 MeV 8 % p ≈ 100 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 1/2- | 1.14×10-4 eV % 2p ≈ 100 | Decays to 17Ne+2p. E(level): Decays to 17Ne+2p. |
| 1.38E3 | (3/2-) | 0.4 MeV 2 % p ≈ 100 | Decays to 18Na*(0,320). E(level): Decays to 18Na*(0,320). |
| 2.14E3 | (5/2-) | 0.6 MeV 6 % p ≈ 100 | Decays to 18Na*(320,854). E(level): Decays to 18Na*(320,854). |
| 2.84E3 | (3/2-) | < 0.2 MeV % p ≈ 100 | Decays to states in 18Na. E(level): Decays to states in 18Na. |
| 4.74E3 | (3/2-) | 2.0 MeV 8 % p ≈ 100 | Decays to 18Na*(320). |
19Mg decays by 2p emission; while the ground state appears to decay by "true 2p emission " the excited states decay sequentially via states in 18Na. Theoretical analysis of the systematics for 2p emission in nuclear decay using the T- and Y- Jacobi coordinate systems is given in (2000Gr16,2001Gr16,2001Gr29,2003Gr24,2010Gr06). See also (2003Gr01,2003Gr04) and (2013Ol02).
Rigorous shell-model predictions are presented for the 19Mg ground state (2010Fo07,2011Fo05,2012Fo10,2012Fo05) and excited state (2013Fo05) structures.