68AS 68SE EC DECAY 1994BA50 12NDS 201206
68AS H TYP=FUL$AUT=E.A. McCutchan$CIT=NDS 113, 1735 (2012)$CUT=1-Mar-2012$
68AS c {+68}Se parent from Zr(p,X), E(p)=600 MeV followed by mass separation
68AS2c by the ISOLDE facility. Measured E|g, I|g, ce, |b|g and |g|g
68AS3c coincidences, and T{-1/2} using a 4|p |b counter, a 2% Ge(Li)
68AS4c detector, 2 Ge detectors (33% and 70%) and a cooled Si detector.
68AS c The evaluator considers this decay scheme to be incomplete based on
68AS2c the large Q(|e) value of 4.7 MeV and the highest observed state at
68AS3c 426 keV. Thus, the I(|e+|b{++})'s should be taken as upper limits
68AS4c and the log {Ift}'s as lower limits.
68AS c 1994Ba50 placed the 314|g-111|g cascade among the 426, 111, and
68AS2c ground states. In an earlier progress report by the same authors of
68AS3c 1994Ba50, the cascade is placed among the 426, 315, and ground
68AS4c states. The latter placement is supported by the observation of a 314
68AS5c level in {+40}Ca({+32}S,3pn|g) (2005St08), {+12}C({+58}Ni,pn|g)
68AS6c (1998So23), and {+54}Fe({+16}O,pn|g) (1997Ba24) and thus adopted
68AS7c here. However, this leads to a severe intensity imbalance (-36%) for
68AS8c the 315 level in {+68}Se |e decay, using the intensities given in
68AS9c 1994Ba50. Taking intensities derived from the adopted branching
68ASac ratios (in particular for the 49.5|g) improves, but does not
68ASbc completely resolve this issue, with a -9% feeding to the 315 level.
68AS c Other: 2004Wo16: |b-endpoint energy measurement giving Q(|e)=4710
68AS2c {I200}. Confirmed transitions observed by 1994Ba50, however, no level
68AS3c scheme given.
68AS cL J,E(a),T(b)$From the Adopted Levels.
68AS cL E$From a least-squares fit to E|g's by evaluator, except where noted.
68AS cL T$From delayed |g|g coincidence measurement, except where noted.
68AS cE IB,IE$From I(|e+|b{++}) and theoretical |b{++}/|e ratios
68AS cE TI$From I(|g+ce) imbalance at each level.
68AS cG RI$Relative intensity normalized to I|g(111|g)=100.
68AS cG M,MR,E(f)$From the Adopted Gammas.
68AS D CC$ FROM BrIcc v2.2b (20-Jan-2009) 2008Ki07, "Frozen Orbitals" appr.
68SE P 0 0+ 35.5 S 7 4705 2
68AS N 0.397 15 0.397 15 1.0 1.0
68AS cN NR,NT$From |S(I|g+ce)(to g.s.)=100% (direct |e feeding of the g.s. is
68AS2cN not expected since |DJ=3).
68AS PN 3
68AS L 0.0 3+ 151.6 S 8 b
68AS2 L %EC+%B+=100
68AS L 158.06 5 3+ a S
68AS G 158.1 1 21 3 M1+E2 -1.3 +5-16 0.10 3 23 3
68ASF G FLAG=f
68ASS G KC=0.09 3$LC=0.010 4$MC=0.0016 5$NC+=0.00011 4
68AS cG TI$from |SI|g(1+|a)(to 158) (evaluator).
68AS cG RI$from I(|g+ce) and |a (evaluator).
68AS L 160.81 18 (2+) 10 NS LT
68AS G 160.8 2 81 4 (M1+E2) -1.49 30 0.100 12
68ASS G KC=0.088 10$LC=0.0104 12$MC=0.00157 19$NC+=0.000112 13
68AS E 6 LT0.1 LT5.5 GT 6 LT ?
68ASS E EAV=1601.81 96$CK=0.01960 4$CL=0.002211 4$CM+=0.0004218 7
68AS L 314.5 3 3+
68AS G 155.1 1 20 3 (M1+E2) -0.07 2 0.02846 S
68ASL G FL=158.06
68ASF G FLAG=f
68ASS G KC=0.0253 5$LC=0.00271 6$MC=0.000414 9$NC+=3.13E-5 7
68AS cG RI$from adopted branching ratios and I|g(315|g)=113 {I7} (evaluator).
68AS G 314.5 3 113 7 M1+E2 -0.067 15 0.004687
68ASS G KC=0.00417 6$LC=0.000439 7$MC=6.70E-5 10$NC+=5.09E-6 8
68AS L 353.0 3 1+
68AS G 192.2 5 19.8 23 (M1+E2) 0.04 3
68ASS G KC=0.038 24$LC=0.004 3$MC=0.0006 5$NC+=5.E-5 3
68AS G 352.6 5 13.0 13 [E2] 0.0079312
68ASS G KC=0.00704 11$LC=0.000765 12$MC=0.0001163 18$NC+=8.62E-6
68AS E 5 LT0.1 LT5.5 GT 5 LT
68ASS E EAV=1510.09 97$CK=0.02309 4$CL=0.002605 5$CM+=0.0004970 9
68AS cE TI$depends strongly on mult of 73|g. Value given corresponds to a
68AS2cE pure M1 transitions, whereas an E2 transition would result in a -14
68AS3cE {I5}% branch.
68AS L 363.8 3 1+
68AS G 49.5 3 0.45 30 [E2] 10.6 3
68ASS G KC=8.62 22$LC=1.70 6$MC=0.256 8$NC+=0.0154 5
68AS cG RI$from adopted branching ratios and I|g(202|g)=5.9 {I18}.
68AS cG RI$Other: The authors report 6.3 {I10}, however, this leads to a
68AS2cG large intensity imbalance (-36%) for the 315 level. The intensity
68AS3cG derived from the adopted branching ratios improves, but does not
68AS4cG resolve this issue, with a -9% feeding to the 315 level.
68AS G 202.7 5 5.9 18 (M1+E2) 0.035 22
68ASS G KC=0.031 19$LC=0.0035 22$MC=0.0005 4$NC+=3.9E-5 24
68AS G 205.6 4 2.0 5 [E2] 0.05399 S
68ASF G FLAG=f
68ASS G KC=0.0476 8$LC=0.00543 9$MC=0.000824 13$NC+=5.94E-5 10
68AS cG RI$from adopted branching ratios and I|g(203|g)=5.9 {I18} (evaluator).
68AS E 5.2 160.14 4 5.43 14 5.3 16
68ASS E EAV=1504.94 97$CK=0.02331 5$CL=0.002630 5$CM+=0.0005018 9
68AS L 425.85 23 1+ 107 NS +23-16
68AS G 72.6 5 19 3 (M1) 0.218 6
68ASS G KC=0.193 5$LC=0.0211 5$MC=0.00323 8$NC+=0.000243 6
68AS cG M$from the Adopted Levels, mult is M1,E2. From the decay scheme, the
68AS2cG requirements that I(|e+|b{++})|<100 and |>0 for the 425 and 353
68AS3cG levels, leads to |d(73|g)|<1.0 and |<1.5, respectively. The evaluator
68AS4cG adopts mult=M1, which gives |S I(|e+|b{++})|?100%
68AS G 111.4 2 100 E2 0.527 9
68ASS G KC=0.458 8$LC=0.0592 10$MC=0.00894 14$NC+=0.000611 10
68AS cG $|a(exp)=0.43 {I10} from I(ceK)/I|g
68AS cG M$from |a(exp).
68AS G 265.0 3 47 4 [M1,E2] 0.014 8
68ASS G KC=0.013 7$LC=0.0014 8$MC=0.00021 11$NC+=1.6E-5 8
68AS G 426.1 4 13 3 E2 0.004236
68ASS G KC=0.00376 6$LC=0.000404 6$MC=6.14E-5 9$NC+=4.58E-6 7
68AS E 91 4 2.6 1 4.145 21 94 4
68ASS E EAV=1475.40 96$CK=0.02463 5$CL=0.002779 5$CM+=0.0005302 1
68AS cE TI$depends strongly on mult of 73|g. Value given corresponds to M1
68AS2cE transition, whereas an E2 transition would result in a 112 {I5}%
68AS3cE branch.