208AT 212FR A DECAY 07NDS 200707
208AT H TYP=ERR$AUT=J. Tuli$DAT=15-Nov-2007$COM=fixed typos based on PNPI rpt
208AT H TYP=FUL$AUT=M. J. MARTIN$CIT=NDS 108,1583 (2007)$CUT=1-Jun-2007$
208AT c The level scheme is that proposed by 2005Ku06 based on |a|g
208AT2c coincidence work. These authors introduce a new level at 681.4,
208AT3c and a tentative new level at 208.3.
208AT cA E,IA$From 1981Va27 except where noted otherwise. The two sets of
208AT2cA closely-spaced |a's, at 6342, 6335, and 6183, 6173, are not
208AT3cA resolved by other authors. See also 1974Ho27 and 1966Va21.
208AT4cA Other E|a:1955Mo69
208AT cA E(A)$From 1981Va27, 1974Ho27, and 1966Va21 as recommended by
208AT2cA 1991Ry01. The energies of these authors were corrected by 1991Ry01
208AT3cA for changes in calibration energies as follows: -0.4 keV (1981Va27),
208AT4cA +0.7 keV (1974Ho27), +0.8 (1966Va21)
208AT cA E(B),IA(B)$E|a is from 2005Ku06. 1966Va21 report E|a=5829 {I8} with
208AT2cA I|a=0.05 {I3}. The 5738|a is reported only by 2005Ku06, and I|a is
208AT3cA deduced relative to I|a(5828)
208AT cA IA$From 1981Va27 except where noted otherwise
208AT cA IA(Z)$Weighted average from 1981Va27, 1974Ho27, and 1966Va21
208AT cA HF$r{-0}({+208}At)=1.454 {I7}
208AT cG E$From 2005Ku06
208AT cG RI,TI$Photon and total intensities deexciting the 227 and higher
208AT2cG levels have been deduced by the evaluator using the adopted I|a
208AT3cG values, the relative photon branchings from each level of 2005Ku06,
208AT4cG the requirement of an intensity balance at each level, and the
208AT5cG assumption that the multipolarities are M1 or E2. The relative
208AT6cG photon branchings of 2005Ku06 are given in adopted gammas. For the
208AT7cG lower levels, the intensities are deduced from the ce data of
208AT8cG 1973GoXM as noted in each case, and the normalization to the
208AT9cG I|a intensities is achieved by intensity balances. From intensity
208ATAcG balances at the g.s. and 23.5 levels, one obtains I|g
208ATBcG normalization=I(|g+ce) normalization=0.745 {I63}, and from intensity
208ATCcG balances at the 63.6 and 147.9 levels one obtains I|g
208ATxcG normalization=I(|g+ce) normalization=0.764 {I65}. The evaluator adopts
208ATDcG a weighted average of 0.75 {I5}. This factor is included in the
208ATEcG intensities given, so that the intensities of both the low- and
208ATFcG high-lying levels are on the same scale, that is, intensities per 100
208ATGcG |a decays. The intensity of the 84.1|g as deduced from the ce data is
208ATHcG inconsistent with that deduced from the |a branch feeding the 63.3
208ATIcG level. The evaluator has adopted the value required by an intensity
208ATJcG balance at the 63.6 level
208AT cG M,MR$From |a(exp). Values from 1973GoXM are deduced from the authors'
208AT2cG measured ce data and I|g data, as noted, normalized such that
208AT3cG |a(K)(227.72|g)=0.126. The 227.72|g is a known E2 transition
208AT4cG following {+212}Fr |e decay
208AT cG M(H),MR(H)$From adopted gammas
208AT cL E$From a least-squares fit to the E|g data
208AT cL J$From adopted levels
212FR P 0.0 5+ 20.0 M 6 6528.8 18
208AT N 1.0 1.0 0.43 2
208AT PN 3
208AT cN NR,NT$see comment on I|g,I(|g+ce)
208AT cN BR$I|a=43 {I2}% (1950Hy27); based on (|e+|b{++})/|a=1.3 {I1} determined
208AT2cN from growth and decay of daughter ({+212}Rn) |a activity
208AT G 92
208AT cG E$from 1983Fa03 observed in coincidence with 6.28-MeV |a group
208AT2cG from the decay of mass=212.2 {I14}
208AT L 0.0 6+ 1.63 H 3
208AT A 6406.2 20 21.9 9 19.0 14
208AT2 A FLAG=AZ$
208AT L 23.48 7 (5)+
208AT A 6383.3 20 23.9 9 14.0 10
208AT2 A FLAG=AZ$
208AT G 23.5 2 0.396 11 M1(+E2) 0.027 LE 166 3 66.2 14
208AT2 G FLAG=H$
208AT cG RI$from I(|g+ce) and |a. The measured I(ce(M))=12 {I6} gives I|g=0.40
208ATxcG {I20}
208AT cG TI$from an intensity balance at the 23.5 level. The measured
208AT2cG ce(M)=12 {I6} gives I(|g+ce)=67 {I33}
208AT L 63.65 10 (4)+
208AT A 6342 3 3.08 24 74 8
208AT G 40.1 2 0.48 6 M1(+E2) 0.026 LE 33.8 2 16.7 21
208AT2 G FLAG=H$
208AT cG RI$ce(L1)=13 {I4}, ce(L2)=2.0 {I7}, ce(M)=3.9 {I5}. These intensities,
208AT2cG along with the adopted mult give I|g=0.57 {I18}, 0.78 {I27}, and 0.64
208AT3cG {I8}, respectively. A weighted average gives I|g=0.64 {I7} and thus
208AT4cG I(|g+ce)=22.3 {I24}. The normalization to the I|a values gives
208AT5cG I|g=0.48 {I6} and I(|g+ce)=16.7 {I21}
208AT L 71.82 16 7+
208AT A 6335 3 10.2 10 20.7 24
208AT G 71.9 2 1.44 14 M1 6.065 10.2 10
208AT cG RI$from I(|g+ce) and |a
208AT cG TI$from an intensity balance at the 72 level
208AT cG M$the directly measured quantities are I|g=1.6 {I5}, ce(L12)=6.3 {I5},
208AT2cG and ce(N)=0.21 {I7}. These data are mutually inconsistent, with
208AT3cG |a(N)exp and ce(N)/ce(L12) both lying outside the M1 and E2 theory
208AT4cG values. |a(L12)exp gives |d<0.36 and thus |a=7.8 {I17}. The measured
208AT5cG I|g and the adopted I(|g+ce) give |a=5.4 {I+29-15}. The evaluator
208AT6cG adopts mult=M1 from (|a,5n|g)
208AT L 113.75 19 (3)+
208AT A 6292 1.0 LT 132 GT S
208AT cA E,IA$this |a branch has not been observed. I|a is estimated
208AT2cA by the evaluator, and E|a comes from Q(|a) and the level energy
208AT G 50.3 3 M1(+E2) 0.046 LE 18.6 2 1.1 5
208AT cG TI$from the decay scheme, I(|g+ce)|>I(|g+ce)(169.9|g) (=0.63 {I13}).
208AT2cG I(|g+ce) is deduced by taking I|a|<1%
208AT L 147.93 8 5+
208AT A 6261.9 22 38 2 2.65 21
208AT2 A FLAG=A$
208AT cA IA$weighted average of 37 {I2} from 1974Ho27 and 40 {I4} from 1966Va21.
208AT2cA These authors used a fresh sample that was free of the 6264|a
208AT3cA from {+212}Rn following the |e decay of {+212}Fr. The spectrum of
208AT4cA 1981Va27 contained this contaminant, and the authors deduced I|a
208AT5cA using an intensity balance of |g transitions at the 148 level
208AT G 84.1 2.5 8 [M1] 3.84 12 4
208AT cG E$seen only in the ce spectrum of 1973GoXM. Not reported by 2005Ku06
208AT cG RI$from I(|g+ce) for mult=M1
208AT cG M,TI$the measured quantities are ce(L12)=4.5 {I8}, ce(M)=1.8 {I6}, and
208AT2cG ce(N)=0.3. These data do not distinguish between M1 and E2. The
208AT3cG authors assign a tentative M1 multipolarity. For mult=M1, one
208AT4cG gets I(|g+ce)=7.5 {I14} from ce(L12), and 13 {I4} from ce(M). The
208AT5cG evaluator adopts I(|g+ce)=12 {I4} from an intensity balance at the
208AT6cG 63.6 level. See general comment on I(|g+ce) and I|g
208AT G 124.5 1 3.3 4 M1 6.48 25 3
208AT cG M,MR$the measured quantities are I|g=5.7 {I5}, ce(K)=19.7 {I50}, and
208AT2cG ce(L12)=4.3 {I4}. From K/L12 one gets |d<0.77. The measured
208AT3cG I|g appears to be too large since it yields a value of |a(L12)exp that
208AT4cG is smaller than the M1 theory value. The evaluator adopts mult=M1
208AT cG RI,TI$from ce(K) one gets I|g=3.8 {I10}, I(|g+ce)=28 {I7} and from
208AT2cG ce(L12) one gets I|g=4.6 {I4} and I(|g+ce)=34 {I3}. A weighted average
208AT3cG gives I(|g+ce)=33 {I4} and from |a one gets I|g=4.4 {I4}.
208AT4cG Normalization to the I|a values then gives I(|g+ce)=25 {I3} and
208ATxcG I|g=3.3 {I4}
208AT G 147.9 1 0.17 4 (M1+E2) 2.3 AP 2.0 AP 0.5 AP
208AT cG RI$from I|g/I|g(124|g)=0.05 {I1} (2005Ku06). 1973GoXM report I|g|?0.5
208AT cG M,MR$the measured quantities are I|g=0.5 and I(ce(K))=0.4, with no
208AT2cG uncertainties quoted. These data give |d|?2.3 and |a|?2.0
208AT L 208.3 3 (4,5)+
208AT cL E$proposed by 2005Ku06 on the basis of the |a energies at which
208AT2cL the |a|g coincidences were observed, and the 40.1-keV energy
208AT3cL difference between the two observed gammas. The 145|g's were observed
208AT4cL in coincidence with broad |a-energy distributions at 6189 {I15} and
208AT5cL 6228 {I5}, while the 185|g's were in coincidence with |a energies
208AT6cL of 6209 {I12}, and 6225 {I6}. The authors show the 208 level as
208AT7cL tentative; however, the 144 and 185|g's are seen in |e decay, and
208AT8cL although unplaced by the authors, the branching agrees well with that
208AT9cL in |a decay
208AT A 6198 ?
208AT cA $This |a group has not been observed. E|a is from Q(|a) and E(level)
208AT G 144.6 2
208AT cG RI$see comment on the 185|g
208AT G 184.7 1
208AT cG RI$2005Ku06 report I|g/I|g(145|g)=0.71 {I13}, but since the possible
208AT2cG |a feeding to the 208 level has not been observed, no absolute
208AT3cG I|g or I(|g+ce) intensities can be deduced
208AT L 227.17 8 (4+,5,6+)
208AT A 6183 3 1.30 12 35 4
208AT G 163.5 2 0.030 13 [M1,E2] 2.0 10 0.09 5
208AT G 203.7 1 0.23 6 [M1,E2] 1.0 6 0.45 14
208AT G 227.2 1 0.46 10 [M1,E2] 0.8 5 0.80 15
208AT L 237.24 13 (4)+
208AT A 6173 4 1.09 12 38 5
208AT G 173.6 1 0.25 6 [M1,E2] 1.7 9 0.69 14
208AT G 213.7 2 0.22 6 [M1,E2] 0.9 5 0.40 12
208AT L 283.56 10 (4+,5+)
208AT A 6127 1.19 12 22 3
208AT G 169.9 2 0.23 5 [M1,E2] 1.8 9 0.63 13
208AT G 219.9 1 0.12 3 [M1,E2] 0.8 4 0.21 7
208AT G 260.1 1 0.23 4 [M1,E2] 0.51 30 0.34 9
208AT G 283.2 5 0.005 3 [M1,E2] 0.40 24 0.007 5
208AT L 334.69 8 (4+,5,6+)
208AT A 6076 3 0.43 5 36 5
208AT G 271.0 2 0.070 12 [M1,E2] 0.45 27 0.101 22
208AT G 311.2 1 0.061 7 [M1,E2] 0.31 19 0.081 16
208AT G 334.7 1 0.20 3 [M1,E2] 0.25 16 0.247 36
208AT L 429.44 14
208AT A 5983 4 0.071 24 81 28
208AT G 202.3 8 0.006 4 [M1,E2] 1.1 6 0.011 8
208AT G 281.6 2 0.019 4 [M1,E2] 0.41 25 0.027 10
208AT G 357.7 2 0.013 5 [M1,E2] 0.21 13 0.015 6
208AT G 405.8 2 0.015 6 [M1,E2] 0.15 9 0.017 7
208AT L 588.15 15 (4+,5,6+)
208AT A 5828 6 0.05 3 21 13
208AT2 A FLAG=B$
208AT G 304.7 2 0.006 4 [M1,E2] 0.33 20 0.008 6
208AT G 361.3 3 0.015 9 [M1,E2] 0.20 13 0.018 11
208AT G 440.6 7 0.0036 21 [M1,E2] 0.12 7 0.004 3 ?
208AT cG E$due to a lack of statistics, the authors give a tentative
208AT2cG assignment to this transition
208AT G 524.2 3 0.011 7 [M1,E2] 0.08 5 0.012 8
208AT G 587.9 3 0.008 5 [M1,E2] 0.06 4 0.008 5
208AT L 681.7 5
208AT A 5738 6 0.002 AP 189 AP
208AT2 A FLAG=B$
208AT G 681.7 5 0.002 AP 0.002 AP