28AL 28MG B- DECAY 1979AL17,1969AL07 13NDS 201310
28AL H TYP=FUL$AUT=M. Shamsuzzoha Basunia$CIT=NDS 114, 1189 (2013)$
28AL2 H CUT=1-Apr-2013$
28AL C Other: 1978DI05
28AL C Sum of decay energies of this dataset is 1833 keV {I4} cf.
28AL2C 1831.8 keV {I20} obtained from 28MG B- DECAY ^Q(g.s.) and branching.
28AL C 1969AL07: 28MG produced from 26MG(T,P)28MG reaction; 99.77%
28AL2C enriched 26MG, E=3.4 MeV; several Ge(Li) detectors were used for G-ray
28AL3C detection and G-G COIN using Ge(Li) and NAI(Tl) detectors. Deduced
28AL4C level scheme.
28AL C 1979AL17: 28MG produced from 26MG(T,P)28MG reaction; 99.77%
28AL2C enriched 26MG, E=3.4 MeV; measured B-G COIN using anthracene crystal
28AL3C and NaI(Tl) detectors. Deduced the isospin-forbidden
28AL4C beta-decay branching ratio of the 0+, ^T=2 Mg ground state to the
28AL5C 972-keV 0+, ^T=1 level of Al.
28AL C
28AL CB IB In 1969Al07, 95% 1 and 5% 1 B- feeding branch is reported
28AL2CB for the 1372.8 keV state JPI=1+ and 1620.0 keV state JPI=1+,
28AL3CB respectively. Later in 1979Al17 a weak B- feed branch of 0.31% 4
28AL4CB to the 972-keV state JPI=0+ is reported. Based on the latest result,
28AL5CB B- feeding branches are adjusted for 100% by the evaluator, consistent
28AL6CB with the G-ray intensity balance at the levels.
28AL CB IB(P) From 1979Al17
28AL CG E,RI From 1969Al07, except otherwise noted
28AL CG E(A),MR From Adopted Gammas
28AL CL E$From a least-squares fit to G-ray energies
28AL CL J$From Adopted Levels
28MG P 0.0 0+ 20.915 H 9 1831.8 20
28AL N 1.0 1.0 1.0
28AL PN 3
28AL CN NR from SUMOF IG(GS + 30.6 level)=100. Based on LOGFT>11.0
28AL2CN for a second forbidden B branch, I(B- to 30.6 level)<0.0063%
28AL L 0.0 3+ 2.245 M 2
28AL CL T$From Adopted Levels
28AL L 30.6383 7 2+
28AL G 30.6383 7 89 M1+E2 +0.001 6 0.0644 11 A
28ALS G KC=0.0600 10$LC=0.00420 7$MC=0.000220 4
28AL CG RI$Deduced by the evaluator from a total transition intensity of 95.0
28AL2CG (1969Al17), consistent with the intensity balance at this level.
28AL3CG Based on log ft>11 for a second forbidden transition,
28AL4CG I(B- to 30.64 level)<0.0063%
28AL L 972.24 20 0+
28AL B 0.31 4 7.96 6 P
28ALS B EAV=319.23 86
28AL CB IB 0.21% 12 (1978Di05)
28AL G 941.7 4 36.3
28AL CG RI$From intensity balance at this level by the evaluator. IG=35.9 in
28AL2CG 1969Al07
28AL G 972.24 0.2 LT
28AL CG E,RI$EG from level-energy differences. Fractional branching <0.5% from
28AL2CG 972 keV level (1969Al17). 972G not adopted, G-ray transition 0+ to 3+
28AL L 1372.85 14 1+
28AL B 94.8 10 4.453 9
28ALS B EAV=155.95 78
28AL G 400.6 2 35.9
28AL G 1342.2 2 54.0
28AL G 1372.8 2 4.7
28AL L 1620.1 3 1+
28AL B 4.9 10 4.57 9
28ALS B EAV=65.19 70
28AL G 648.1 5 0.085
28AL G 1589.4 4 4.7
28AL G 1620.0 4 0.3