238NP 242AM A DECAY (141 Y) 1990HO02,1979BA67 15NDS 201507
238NP H TYP=FUL$AUT=E. BROWNE, J. K. TULI$CIT=NDS 127, 191 (2015)$
238NP2 H CUT=1-Jun-2014$
238NP D Corrected by E. Browne (Oct. 23, 2014).
238NP d Corrections done by A.L. Nichols and B. Singh, Nov 16, 2010
238NP2d for conversion coefficient of 66.89|g, 5251|a, and several expected
238NP3d but unobserved |g transitions added, as indicated in the dataset.
238NP c The |a decay branching of {+242m}Am is 0.459% {I12}; 98.54% decays
238NP2c by an isomeric transition (IT).
238NP cA HF$r{-0}=1.508 {I5}
238NP cA IA$From 1990Ho02, except where noted otherwise. Uncertainties are not
238NP2cA given in 1979Ba67; however,their values agree well with those given
238NP3cA in 1990Ho02, except for the branch to the 300-keV level (or doublet).
238NP dA $ Above comment edited by A.L. Nichols and B. Singh (Nov 16, 2010)
238NP cA E(A),IA(A)$From 1979Ba67, not reported in 1990Ho02.
238NP cA E(B),IA(B)$1979Ba67 report a doublet with E|?5173 and 5173.5 {I15} with
238NP2cA I|a=0.04. One of these lines corresponds to the 376.71 {I6} level.
238NP3cA The other may correspond to a 374.7 keV {I10} level reported in (d,p).
238NP cG M,MR$From adopted gammas
238NP cA E$From Q(|a) and E(level), except where noted otherwise. Experimental
238NP2cA values have been measured in 1990Ho02 and 1979Ba67 and are given in
238NP3cA comments. Note that for 1979Ba67, the authors' original values have
238NP4cA been decreased by 0.2 keV, as recommended in 1991Ry01, to account for
238NP5cA changes in calibration energies. The authors assign |D(E|a)=0.5 keV to
238NP6cA the two most intense lines, and state that uncertainties do not
238NP7cA exceed 1.0- to 1.5 keV for most of the other lines. Based on this
238NP8cA statement, the evaluators have assigned uncertainties of 1.0 keV
238NP9cA for lines with I|a between 0.6- and 1.2%, and 1.5 keV for lines with
238NPAcA I|a between 0.02 and 0.2. No uncertainties have been assigned to the
238NPBcA two lines with I|a<0.01%.
238NP cA E(D),IA(D)$E|a=5249.8 keV {I15} (with %I|a=0.04) in 1979Ba67 gives
238NP2cA E(level)=298.9 keV {I15}. Based just on energy, this |a branch could
238NP3cA correspond to those to the 299.24 keV and possibly to the 297.04- or
238NP4cA 300.65 keV levels. The branch with E=5248.1 keV {I12}, is a weighted
238NP5cA average of 5248.0 keV {I15}, from 1979Ba67, and 5248.4 keV {I22} from
238NP6cA 1990Ho02, gives E(level)=300.7 keV {I12} which could correspond to the
238NP7cA the 299.24 level. 1979Ba67 give I|a|?0.11% and 1990Ho02 give 1.0% {I1}
238NP8cA for this branch. 1990Ho02 assign the first branch to the 297.04 level,
238NP9cA and the second to the 299.24 and 300.65 levels. Evaluators suggest
238NPAcA that the 300.755-keV level also may be fed.
238NP cG E,RI$From 1990Ho02, except where noted otherwise. The I|g are per
238NP2cG 100 |a decays, obtained by measuring the intensity ratio at
238NP3cG saturation for the 984.45-keV|g in {+238}Np |b{+-} decay and the
238NP4cG 163.25-keV|g in {+242}Am (141y) |a decay. The uncertainties given
238NP5cG are relative values. For absolute uncertainties add 14.3% in quadrature
238NP cG RI(B)$1990Ho02 report I|g=4.0 {I3} for a 109.59 keV {I2} transition
238NP2cG doubly placed from the 136- and 342-keV levels.
238NP cG RI(C)$1990Ho02 report I|g=0.150 {I8} for a 152.79-keV {I2} transition
238NP2cG doubly placed from the 179- and 259-keV levels. The energy is probably
238NP3cG a misprint. The authors report E=152.69 keV {I3} for the same
238NP4cG transition in (n,|g). From E(level) differences, excluding this
238NP5cG transition, one obtains E|g=152.733 keV {I9} for placement from the
238NP6cG 179-keV level,and 152.67 keV {I4} for placement from the 259-keV level
238NP cG RI(D)$1990Ho02 report I|g=0.024 {I7} for a 139.05 keV {I2} transition
238NP2cG doubly placed from the 166- and 300.755 keV levels
238NP cG RI(E)$1990Ho02 report I|g=3.50 {I10} for a 163.25 keV {I2} transition
238NP2cG doubly placed from the 329- and 342-keV levels. From I|g/I|g(66.9|g)
238NP3cG in (n,|g), one expects I|g(163|g)=4.0 {I8} for placement from the
238NP4cG 342-keV level. This leaves I|g|<0.32 for placement from the 329-keV
238NP5cG level. Evaluators adopt I|g(163.25|g)=3.34 {I19} and |<0.32 for each
238NPxcG placement, respectively.
238NP cG E(F),RI(F)$1990Ho02 report I|g=0.122 {I10} for a 250.33 keV {I3}
238NP2cG transition doubly placed from the 250.3- and 313-keV levels.
238NP3cG From I|g/I|g(176|g)|<2.6 from the 313-keV level in (n,|g), one obtains
238NP4cG I|g(250|g from 313)|<0.024,and thus I|g(250|g from 250)=0.110 {I16}
238NP cG E(X)$ |g transition included on the basis of (n,|g) results in
238NP2cG 1990Ho02. E|g is from level-energy difference.
238NP3dG (A.L. Nichols, B. Singh, Nov 16, 2010)
238NP dG There is a good possibility that the 26.32|g line in 1990Ho02
238NP2dG arises primarily from the alpha decay of {+241}Am (isotopic content of
238NP3dG 0.79% in the source material used by 1990Ho02, and known |g-ray energy
238NP4dG of 26.3446 keV {I2} keV in {+237}Np from {+241}Am |a decay).
238NP5dG (Comment added by A.L. Nichols and B. Singh, Nov 16, 2010)
238NP cG E(U)$ This |g unplaced in 1990Ho02.
238NP cL E$From a least-squares fit to the E|g data, except where noted
238NP2cL otherwise
238NP cL E(A)$From E|a and Q(|a)
238NP cL E(C)$Rounded-off values from adopted levels
238NP cL J$From adopted levels
238NP cL T(B)$1966As06 report T{-1/2}=50 ns for a level at 300 keV from an
238NP2cL |a|g(t) experiment. No details are given, in particular the |g
238NP3cL transition selected is not given, so which of the four levels at
238NP4cL 300 keV is involved cannot be determined
242AM P 48.63 5 5- 141 Y 2 5588.50 25
242AM cP QP$ From 2012Wa38.
242AM dP Comment added by A.L. Nichols and B. Singh (Nov 16, 2010)
238NP N 1.0 1.0 4.59E-312
238NP dN NR,NT$ Earlier value of 1.0 {I5} changed to 1.0 (A.L. Nichols, B. Singh
238NP2dN Nov 16, 2010), as there seems no evidence for the assignment of 50%
238NP3dN uncertainty. A systematic uncertainty of 14.3%, to be added in
238NP4dN quadrature, is already stated in comment for I|g
238NP cN BR$%|a=0.459 {I12}
238NP PN 3
238NP G 26.32 3 1.36 10 E1(+M2)
238NP dG M$ E1(+M1) corrected to E1(+M2).
238NP dG E,RI$The 26.32-keV gamma transition in 1990Ho02 is controversial
238NP2dG if it is assumed to deexcite the 26.44-keV level in {+238}Np.
238NP3dG The quoted I|g=1.36 {I10} per 100 |a decays, when combined
238NP4dG with the internal conversion coefficients for an expected M1 transition
238NP5dG ,generates an unrealistic absolute transition probability of 2.1%.
238NP cG RI$It probably contains contribution from contamination with
238NP2cG {+241}Am alpha decay.
238NP cG M$the multipolarity is mainly E1 since I(|g+ce) should be <100.
238NP2cG This limit gives |d(M2/E1)<0.05
238NP G 89.60 5 0.29 7
238NP G 114.3 6
238NP G 160.61 2 0.09 4
238NP G 165.97 15 0.010 5
238NP G 233.69 10 0.028 7
238NP L 0 2+
238NP L 26.450 16 3+
238NP2 L FLAG=C$
238NP A 5517.79 0.006 LE 1.7E+6 GE
238NP2 A FLAG=A$
238NP cA E,IA$1979Ba67 report 5517.1 keV but this |a peak may include a
238NP2cA contribution from {+242}Cm |a decay not reported in 1990Ho02.
238NP cA E$ uncertainty of 0.25 keV omitted in view of general footnote for I|a
238NP G 26.44 X S
238NP L 62.344 22 4+
238NP2 L FLAG=C$
238NP G 35.89 X S
238NP G 62.34 X S
238NP L 86.651 15 3+
238NP2 L FLAG=C$
238NP A 5458.58 25 0.14 3.9E+4 5
238NP2 A FLAG=A$
238NP cA E$1979Ba67 report 5458.1 keV {I15}. Not reported in 1990Ho02.
238NP cA HF$uncertainty in HF does not include the contribution from I|a.
238NP G 24.31 X S
238NP G 60.13 6 1.19 11 M1+E2 0.08 2 24.5 3
238NP G 86.65 2 4.97 15 M1+E2 0.112 3 8.56 1
238NP L 106.13 3 5+
238NP2 L FLAG=C$
238NP G 43.79 X S
238NP G 79.68 X S
238NP L 121.659 23 4+
238NP2 L FLAG=C$
238NP G 35.01 X S
238NP G 59.32 X S
238NP G 95.21 X S
238NP G 121.66 X S
238NP L 136.021 14 3- 6.0 NS
238NP cL T$from |a|g(t) of 1966As06
238NP A 5410.03 25 1.0 2 2.9E+3 8
238NP cA E$5409.1 keV {I10} (1979Ba67), 5412.4 keV {I21} (1990Ho02)
238NP G 49.35 2 29.1 9 E1 0.828
238NP G 73.66 2 1.71 12 E1 0.290
238NP G 109.59 2 4.3 LE E1+M2 0.026 7 0.142 20 &
238NP2 G FLAG=B$
238NP G 136.03 2 2.05 6 E1 0.251
238NP L 161.68 4 6+
238NP L 165.518 23 5+
238NP G 43.86 X S
238NP G 139.05 2 0.031 LE &
238NP2 G FLAG=D$
238NP L 179.145 18 4-
238NP A 5367.61 25 1.1 2 1.5E+3 4
238NP cA E$5367.0 keV {I10} (1979Ba67), 5369.1 keV {I18} (1990Ho02)
238NP G 43.12 X S
238NP G 57.54 6 0.21 5
238NPF G FLAG=U
238NP G 92.52 3 0.61 7
238NP G 152.69 2 0.158 LE &
238NP2 G FLAG=C$
238NP L 182.885 16 2-
238NP G 46.87 X S
238NP G 95.7 6
238NP G 156.46 2 0.059 10 E1 0.181
238NP G 182.86 2 0.199 7 E1 0.125
238NP L 215.503 16 3-
238NP A 5331.85 25 0.15 10 11E+3 AP
238NP cA E$5331 keV {I5} (1990Ho02). Not reported in 1979Ba67
238NP cA HF$symmetrized uncertainties. HF=6|*10{+3} {I+14-3}
238NP G 32.62 X S
238NP G 79.48 X S
238NP G 93.82 3 0.79 9
238NP G 153.16 X S
238NP G 189.01 3 0.059 10 E1 0.116
238NP G 215.52 2 0.129 21 E1 0.085
238NP L 218.7 6(6+)
238NP G 53.2 X S
238NP L 232.82 3 5-
238NP A 5314.83 25 0.6 1 376 70
238NP cA E$5313.3 keV {I10} (1979Ba67), 5313.6 keV {I10} (1990Ho02)
238NP G 53.69 3 0.45 6 M1+E2 0.271 4 50.1 4
238NP G 96.80 X S
238NP G 111.16 5 0.55 9 (E1) 0.099
238NP L 250.33 3(1+)
238NP G 250.33 3 0.110 6 @
238NP2 G FLAG=F$
238NP L 258.83 3 4-
238NP G 43.33 X S
238NP G 75.95 X S
238NP G 122.5 6
238NP G 152.69 2 0.158 LE &
238NP2 G FLAG=C$
238NP G 196.46 10 0.021 10
238NP cG E$not seen in (n,|g), but assigned to this level in 1990Ho02
238NP G 232.40 3 0.122 7 E1 0.0719
238NP L 275.505 23 5+
238NP A 5272.85 25 1.1 1 420 41
238NP cA E$|?5273 keV (1979Ba67), 5271 keV {I3} (1990Ho02)
238NP G 153.85 2 0.721 22
238NP G 213.20 14 0.012 4
238NPF G FLAG=U
238NP L 297.01 5(6-)
238NP2 L FLAG=B$
238NP A 5251.67 26 0.04 LE 6300 GE
238NP2 A FLAG=D$
238NP cA E$ 4251.67 corrected to 5251.67.
238NP G 131.49 8 0.059 31
238NP G 190.88 5 0.023 5
238NP L 299.25 6(3+)
238NP2 L FLAG=B$
238NP A 5249.50 26 0.04 LE 6100 GE
238NP2 A FLAG=D$
238NP G 237.02 10 0.010 5
238NP G 272.75 7 0.0081 18
238NP G 299.20 14 0.006 3
238NP L 300.726 25(6-)
238NP2 L FLAG=B$
238NP A 5248.01 25 1.1 LE 220 GE
238NP2 A FLAG=D$
238NP G 67.93 3 0.87 7
238NP cG E$ duplicated |g ray, the unplaced one has been omitted.
238NP G 121.3 6
238NP G 135.19 2 1.47 8
238NP G 139.05 2 0.031 LE &
238NP2 G FLAG=D$
238NP G 194.61 2 0.308 10
238NP L 300.79 5 1-,2,3,4-
238NP2 L FLAG=B$
238NP A 5248.12 26 1.1 LE 220 GE
238NP2 A FLAG=D$
238NP G 84.9 2 0.21 7
238NP G 117.2 6 *
238NP G 164.67 7
238NP G 238.53 5 0.0035 18
238NPF G FLAG=U
238NP L 312.75 5 5-
238NP G 53.92 X S
238NP G 98.0 6
238NP G 151.07 4 0.018 4
238NP G 176.68 15 0.006 3
238NP G 250.33 0.024 LE @
238NP2 G FLAG=F$
238NP L 328.77 3 6+ ?
238NP G 163.25 2 0.33 LE @ ?
238NP2 G FLAG=E$
238NP L 334.8 1- TO 3- ?
238NP2 L FLAG=A$
238NP A 5214.5 0.03 5.9E+3 8 ?
238NP2 A FLAG=A$
238NP cA E$reported only in 1979Ba67 as a questionable line
238NP L 342.390 18 5-
238NP A 5207.06 25 89.0 7 1.79 24
238NP cA E$5206.6 keV {I5} (1979Ba67), 5208.4 keV {I8} (1990Ho02)
238NP G 66.89 2 3.25 10 E1 0.369
238NP dG CC$ previous value of 4.61 corrected to 0.369 (A.L. Nichols, B. Singh,
238NP2dG Nov 16, 2010)
238NP G 109.59 4.3 LE &
238NP2 G FLAG=B$
238NP G 126.83 5 0.028 14
238NPF G FLAG=U
238NP G 163.25 2 3.34 19 M1+E2 6.6 +24-12 1.90 5 @
238NP2 G FLAG=E$
238NP G 206.37 2 0.34 4
238NP G 280.04 5 0.0130 14
238NPF G FLAG=U
238NP L 374.7 10(5+) ?
238NP cL E$from (d,p)
238NP dL E$ questionable level (A.L. Nichols, B. Singh, Nov 16, 2010)
238NP A 5175.3 10 0.04 LE 2100 GE
238NP2 A FLAG=B
238NP L 376.68 7(6-)
238NP A 5173.31 26 0.04 LE 2000 GE
238NP2 A FLAG=B$
238NP G 117.8 6
238NP G 270.55 6 0.0063 18
238NP L 389.2 6 7+
238NP G 113.7 6
238NP G 170.50 1 0.136 10
238NP L 397.3 15
238NP2 L FLAG=A$
238NP A 5153.1 15 0.02 3.6E+3 5
238NP2 A FLAG=A$
238NP cA E$from 1979Ba67. Not reported in 1990Ho02
238NP L 407.58 7 6-
238NP A 5143.0 13 5.6 2 11.1 16
238NP cA E$5141.4 keV {I5} (1979Ba67), 5144.4 keV {I9} (1990Ho02)
238NP G 132.6 6
238NP G 174.76 6 0.038 10
238NP L 459.6 6(6+)
238NP2 L FLAG=A$
238NP A 5091.8 6 0.21 7 158 60
238NP cA E$weighted average of 5088.2 keV {I15} from 1979Ba67 and
238NPxcA 5093 keV {I4} from 1990Ho02.
238NP G 117.2 6 *
238NP L 470 2 1- TO 4-
238NP2 L FLAG=A
238NP A 5082 2 0.03 8.3E+2 11
238NP2 A FLAG=A$
238NP cA E$from 1979Ba67. Not reported in 1990Ho02
238NP L 484 3 7-
238NP2 L FLAG=A
238NP A 5068 3 0.25 7 88 30
238NP cA E$unweighted average of 5064.0 keV {I15} from 1979Ba67,
238NPxcA and 5072 keV {I3} from 1990Ho02
238NP L 525.3 15(7+)
238NP2 L FLAG=A$
238NP A 5027.2 15 0.02 1 700 AP
238NP cA E$weighted average of 5026.9 keV {I15} from 1979Ba67,
238NPxcA and 5031 keV {I5} from 1990Ho02.
238NP cA HF$symmetrized uncertainty. HF=540 {I+509-210}
238NP L 578.7
238NP2 L FLAG=A$
238NP A 4974.7 0.002 AP 2400 AP
238NP2 A FLAG=A$
238NP cA E$from 1979Ba67. Not reported in 1990Ho02
238NP cA HF$HF=2.4|*10{+3} {I3}