ADOPTED LEVELS, GAMMAS for 20Mg
Authors: J.H. Kelley, G.C. Sheu | Citation: ENSDF | Cutoff date: 20-June-2019
Full ENSDF file | Adopted Levels (PDF version)
| S(n)= 22420 keV 50 | S(p)= 2741 keV 11 | Q(α)= -8934 keV 21 | |||
| Reference: 2017Wa10 |
| References: | |||
| A | 2H(20Mg,d) | B | 3He(20Ne,20Mg) |
| C | 9Be(22Mg,20MgG) | D | 9Be(24Mg,20Mg) |
| E | 9Be(28Si,20Mg) | F | 12C(20Mg,20Mg) |
| G | 20Ne(3He,3n) | H | 24Mg(α,8He) |
| I | 27Al(20Ne,20Mg) | J | SI(p,20Mg) |
| K | NI(20Ne,20Mg) | L | NI(24Mg,20Mg) |
| M | NI(36Ar,20Mg) | N | 208Pb(20Mg,20Mg’) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) |
| 0 | ABCDEFGHIJKLMN | 0+ | 90.4 ms 7 % β+p = 30.3 12 | ||
| 1598 10 | A C N | 2+ | 1598 10 | 100 | |
| 3.70E3 20 | A | (2+,4+) | 0.47 MeV 6 | ||
| 5.37E3 2 | A |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 0+ | 90.4 ms 7 % β+p = 30.3 12 | T1/2=90.0 ms 6 (2017Su05) from 9Be(28Si,20Mg). E(level): T1/2=90.0 ms 6 (2017Su05) from 9Be(28Si,20Mg). |
The β+ decay of 20Mg populates 20Na*(984) for 69.7 % 12 of the decays (1995Pi03). The remaining 30.3% of decays populate 20Na levels that proton decay to states in 19Ne.
The α=20 t=2 mass multiplet is analyzed via the IMME in (1974Ce05, 1974Ro17, 1976Mi01, 1976Tr03, 1979Mo02, 1981Ay01, 1984An18, 2007Ga38, 2012Fo13, 2014Ga20)
For theoretical analysis of the level properties see:
Shell Model: 1980Wi18, 1987Po01, 1990Br26, 1997Ot01, 1999Si13, 2012Po15, 2014To04, 2014Yu02, 2015La10, 2016Ba59. 2017Dr03;
Hartree-Fock-Bogoliubov: 1996Gr21, 1997Te19, 2000St04, 2001La06, 2008Sc02, 2012Li11, 2014Ga13;
Cluster model: 1996Ch04, 1998De43, 1999Sh32, 2002Gu10, 2005Ma98, 2006Ma17, 2007Ma54;
Mean Field: 1996Re03, 1996Re10, 1997Ot01, 1997Pa38, 1998La02, 2003Bh06, 2003Jh01, 2005Ch71, 2006Sa29, 2008Sc02, 2011Ro50;
Other: 1978Gu10, 1984Ha14, 2001Pi11, 2002Mi14, 2002Ro32, 2002Sc48, 2006Zh19, 2007Wa30, 2010Zh45, 2011Eb04, 2011Gu03, 2011Ya01, 2013Bh09, 2013Eb02, 2013Ho01, 2013Sc14, 2015Si12, 2015Wu07, 2016Fo20, 2016Ja03, 2016Ro17, 2018Fo04.