247CM 251CF A DECAY 2003AH07,1968CH03,1970BRZN15NDS 201503
247CM H TYP=FUL$AUT=C. D. NESARAJA$CIT=NDS 125, 395 (2015)$CUT=31-Mar-2014$
247CM c 2003Ah07: Produced {+251}Cf from |a decay of {+255}Fm. Measured level
247CM2c T{-1/2}, |g, |a, |a-|g coincidence, and electron spectra with high
247CM3c resolution spectrometers such as the passivated, implanted, planar
247CM4c silicon Detector (PIPS) (FWHM=10.5 and 9.2 keV). The latter being also
247CM5c measured by the PIN diode.
247CM c 1970BrZN: Studied alpha spectrum decay of {+251}Cf with a Au-Si
247CM2c surface barrier detector (FWHM=15 keV) and ZnS-photomultiplier tube.
247CM3c Measured |g's with 5 cm{+3} Ge(Li) detector and electrons with
247CM4c Si(Li) detector. Measured |a-particles energies, |g energies,
247CM5c intensities, |a-|g coincidence, and conversion electrons.
247CM c 1968Ch03: |a decay of {+251}Cf along with |a-|g coincidence
247CM2c measurements were done using Si(Au), Ge(Li) and NaI(Tl) detectors
247CM3c Measured E|a, I|a, E|g, I|g, |a-|g coincidences. Deduced J|p, T{-1/2}
247CM4c and identified rotational bands
247CM c Other measurements: 1966Rg01
247CM cA E$Measurements by 2003Ah07, except where noted otherwise.
247CM cA IA$Measurements of 2003Ah07 are adopted.
247CM cA HF$r{-0}({+247}Cm)=1.4924 {I88}, unweighted average of
247CM2cA r{-0}({+246}Cm)=1.4836 {I5} and r{-0}({+248}Cm)=1.5012 {I6} (1998Ak04),
247CM3cA is used in calculations of HF.
247CM tG ${+251}Cm x-rays: (2003Ah07)
247CM2tG
247CM3tG E(x-ray) I(x-ray) Transitions
247CM4tG -------- -------- -----------
247CM5tG 104.57 {I2} 12.6 {I7} K|a{-2} x-ray
247CM6tG 109.26 {I2} 19.8 {I10} K|a{-1} x-ray
247CM7tG 122.31 {I2} K|b{-3} x-ray
247CM8tG 7.7 {I5}
247CM9tG I(K|b{-3} x-ray+K|b{-1} x-ray)
247CMatG 123.40 {I2} K|b{-1} x-ray
247CMbtG 127.01 {I4} K|b{-2} x-ray+K|b{-4} x-r
247CM+tG ay
247CMctG 2.6 {I2}
247CMdtG I(K|b{-2} x-ray+K|b{-4} x-ray
247CMetG +K|O{-23} x-ray)
247CMftG 128.00 {I5} K|O{-23} x-ray
247CMgtG
247CMhtG Others: 1966Rg01, 1968Ch03, 1970BrZN
247CMitG
247CM cG
247CM cG E$From 2003Ah07. Other measurements: 1968Ch03, 1970BrZN.
247CM cG RI$Measured by 2003Ah07, except as noted otherwise.
247CM2cG Absolute intensities were determined by 2003Ah07 by measuring the
247CM3cG alpha rate of a thin {+251}Cf source with a Si detector of known
247CM4cG geometry and measuring the gamma spectrum with a Ge spectrometer of
247CM5cG known absolute efficiency which was determined with a calibrated
247CM6cG source. Earlier measurements: 1968Ch03, 1970BrZN.
247CM3cG See also {+247}Am |b{+-} decay.
247CM cG E(S)$Transition was not observed. Existence is from the level
247CM2cG scheme.
247CM cG M,MR(B)$Determined by evaluator from |a(exp) (2003Ah07)
247CM cG CC(A)$Deduced by evaluator from intensity balance
247CM DG CC$FROM BrIcc v2.3a (30-Jun-2013) 2008Ki07, "Frozen Orbitals" appr.
247CM cL E$From least-squares fit to E|g's
247CM CL BAND(D)$ 9/2[734]
247CM CL BAND(E)$ 5/2[622]
247CM CL BAND(F)$ 7/2[624]
247CM CL BAND(G)$ 1/2[620]
247CM CL BAND(H)$ 1/2[631]
251CF P 0.0 1/2+ 898 Y 44 6177.0 9
251CF cP T$From Adopted Levels in {+251}Cf
251CF cP QP$From 2012Wa38.
251CF2cP E|a (to 404.90 level)=5679.3 {I16} yields Q|a=6176.2 {I16}
247CM N 1.0 1.0 1.0
247CM PN 2
247CM L 0.0 9/2- 1.56E+7 Y 5 D
247CM cL T$From Adopted Levels
247CM A 6078 2 2.6 1 5.15E3 36
247CM cA IA$6 {I5} from I(|g+ce) imbalances
247CM L 61.67 411/2- D
247CM A 6017 2 12.5 3 519 32
247CM cA IA$9.7 {I16} from I(|g+ce) imbalances
247CM G 61.67 5 0.40 3 M1+E2 0.25 2 37.5 16 B
247CMS G LC=27.8 11$MC=7.1 4
247CMS G NC=1.96 9$OC=0.491 21$PC=0.092 4$QC=0.00493 8
247CM cG $|a(L1+L2):|a(L3):|a(M+N)=23.5 {I31}:3.3 {I8}:11.0 {I17} (2003Ah07)
247CM cG $|a(K):|a(L1+L2):|a(L3):|a(M):|a(N)=0.24 {I5}:1.0 {I1}:0.5 {I1}:0.7
247CM2cG {I1}:0.37 {I5} (1970BrZN)
247CM L 134.66 613/2- D
247CM A 5946 2 0.60 6 4.52E3 52
247CM G 73.00 8 0.040 5 [M1+E2] 0.7 +5-4 39 16 A
247CMF G FLAG=B
247CMS G LC=28 13$MC=8 4
247CMS G NC=2.1 10$OC=0.52 24$PC=0.09 4$QC=0.0023 7
247CM G 134.65 8 0.014 3 [E2] 4.94
247CMS G KC=0.1531 22$LC=3.46 5$MC=0.976 14
247CMS G NC=0.272 4$OC=0.0659 10$PC=0.01104 16$QC=6.08E-5 9
247CM L 219.02 715/2- D
247CM A 5859 S
247CM cA $From the |g's de-exciting the 219-keV level, existence of an
247CM2cA alpha branch to the 219.0-keV level with I|a=1.2% {I7} and
247CM3cA E|a=5862 {I2} may be deduced from intensity balance.
247CM4cA For I|a|?1.2%, HF|?800.
247CM G 84.35 8 0.040 5 [M1+E2] 26 15
247CMS G LC=19 11$MC=5 4
247CMS G NC=1.5 9$OC=0.36 22$PC=0.06 4$QC=0.0012 9
247CM G 157.35 8 0.020 4 [E2] 2.56
247CMS G KC=0.1741 25$LC=1.723 25$MC=0.485 7
247CMS G NC=0.1350 20$OC=0.0328 5$PC=0.00552 8$QC=3.65E-5 6
247CM L 227.379 195/2+ 26.3 US 3 EM
247CM cL T$From 2003Ah03. Others: 25 |ms {I3} (1968Ch03)
247CM A 5854 2 27.6 5 31.7 19
247CM G 165.70 5 0.12 1 E3 30.4
247CMS G KC=0.235 4$LC=21.3 3$MC=6.47 10
247CMS G NC=1.83 3$OC=0.445 7$PC=0.0750 11$QC=0.000469 7
247CM cG $Ice(L1+L2):Ice(L3)=15 {I3}:6.7 {I26} (2003Ah07).
247CM G 227.38 2 6.8 3 M2+E3 0.52 +9-8 10.3 4
247CMS G KC=6.0 5$LC=3.15 9$MC=0.87 3
247CMS G NC=0.242 9$OC=0.0609 20$PC=0.0113 3$QC=0.00056 4
247CM cG $|a(K):|a(L1+L2):|a(L3):|a(M+N)=6.0 {I5}:2.7 {I3}:0.41 {I5}
247CM2cG :1.53 {I17} (2003Ah07)
247CM cG $|a(K):|a(L1+L2):|a(L3):|a(M):|a(N)=7 {I2}:3.7 {I6}:0.6 {I2}:2.1 {I4}
247CM2cG :0.85 {I15} (1970BrZN)
247CM L 265.86 4(7/2+) E
247CM A 5817 2 4.0 2 136 11
247CM G 38.48 5 0.038 6 (M1+E2) 0.21 5 183 32 A
247CMF G FLAG=B
247CMS G LC=1.4E2 3$MC=35 8
247CMS G NC=9.8 21$OC=2.4 5$PC=0.44 8$QC=0.0202 4
247CM G 265.86 8 0.43 3 [E1] 0.0565 8
247CMS G KC=0.0442 7$LC=0.00927 13$MC=0.00226 4
247CMS G NC=0.000617 9$OC=0.0001540 22$PC=2.86E-5 4$QC=1.559E-6 22
247CM cG $Since an E1 transition from 5/2[622] to 9/2[734] state
247CM2cG would be K forbidden, there might be some M2 admixture in 265.86 |g.
247CM3cG |a(M2)=7.10.
247CM L 285.41 5(7/2+) F
247CM A 5798 2 2.5 2 170 17
247CM G 58.03 5 0.024 5 (M1+E2) 0.53 11 80 22 A
247CMF G FLAG=B
247CMS G LC=59 11$MC=16 4
247CMS G NC=4.4 9$OC=1.08 21$PC=0.19 4$QC=0.0052 4
247CM G 285.41 8 1.13 9 [E1] 0.0484
247CMS G KC=0.0380 6$LC=0.00787 11$MC=0.00192 3
247CMS G NC=0.000523 8$OC=0.0001308 19$PC=2.44E-5 4$QC=1.350E-6 19
247CM L 318.31 59/2+ E
247CM A 5766 2 3.6 2 78 7
247CM G 52.45 5 0.048 5 (M1+E2) 0.27 6 70 8 A
247CMF G FLAG=B
247CMS G LC=51 8$MC=13.3 23
247CMS G NC=3.7 7$OC=0.92 15$PC=0.169 24$QC=0.00792 21
247CM G 256.65 8 0.13 1 [E1] 0.0611 9
247CMS G KC=0.0477 7$LC=0.01007 15$MC=0.00246 4
247CMS G NC=0.000670 10$OC=0.0001672 24$PC=3.10E-5 5$QC=1.675E-6 24
247CM G 318.3 1 0.050 5 [E1] 0.0384
247CMS G KC=0.0302 5$LC=0.00614 9$MC=0.001495 21
247CMS G NC=0.000408 6$OC=0.0001021 15$PC=1.91E-5 3$QC=1.086E-6 16
247CM L 345.89 6(9/2+) F
247CM A 5738 2 0.8 1 248 34
247CM G 60.5 1 0.010 3 (M1+E2) 0.48 16 62 21 A
247CMF G FLAG=B
247CMS G LC=46 13$MC=12 4
247CMS G NC=3.4 11$OC=0.83 25$PC=0.15 4$QC=0.0047 5
247CM G 284.2 1 0.12 1 [E1] 0.0489 7
247CMS G KC=0.0383 6$LC=0.00794 12$MC=0.00194 3
247CMS G NC=0.000528 8$OC=0.0001320 19$PC=2.46E-5 4$QC=1.362E-6 19
247CM G 345.9 1 0.043 4 [E1] 0.0322 5
247CMS G KC=0.0254 4$LC=0.00510 8$MC=0.001240 18
247CMS G NC=0.000338 5$OC=8.48E-5 12$PC=1.593E-5 23$QC=9.22E-7 13
247CM L 404.90 31/2+ 100.6 NS 6 G
247CM cL T$From 2003Ah03
247CM A 5679.3 1635.4 5 2.62 16
247CM cA IA$44.2 {I24} from I(|g+ce) imbalances
247CM cA E$Recommended by 1991Ry01 from E|a=5680.3 {I10} measured
247CM2cA by 1971Bb10, 5667 {I10} by 1968Ch03, and 5667 {I3} by 1970BrZN.
247CM3cA Adjustments were applied by 1991Ry01 because of changes in calibration
247CM4cA energies. E|a=5679 {I2} from 2003Ah07.
247CM G 177.52 2 17.3 9 E2 1.567 22
247CMS G KC=0.1643 23$LC=1.015 15$MC=0.285 4
247CMS G NC=0.0794 12$OC=0.0193 3$PC=0.00327 5$QC=2.52E-5 4
247CM cG $Ice(K):Ice(L1+L2):Ice(L3):Ice(M+N)=0.19 {I3}:0.71 {I8}:0.31
247CM2cG {I3}:0.41 {I5} (2003Ah07)
247CM cG $Ice(K):Ice(L1+L2):Ice(L3):Ice(M):Ice(N)=
247CM2cG 4.1 {I6}:18 {I1}:9 {I1}:12 {I1}:6.4 {I10} (1970BrZN)
247CM cG $|a(K)exp=0.25, |a(exp)=1.27 (1968Ch03).
247CM L 432.98 23(3/2+) G
247CM A 5651 2 3.3 2 19.5 17
247CM G 28 2 S S
247CM L 448.8 13(5/2+) G
247CM A 5635 2 4.9 2 10.7 8
247CM G 16 3 S S
247CM G 44 2 S S
247CM L 516.68 11(7/2+) G
247CM A 5569 2 1.9 LE 11 GE
247CM cA E$From E|a(404.9 level)=5679.3 {I16} and the level energy difference
247CM2cA from least-squares fit to E|g's (recoil energy is taken into account).
247CM3cA E|a=5568 {I2}, measured by 2003Ah07, is assumed by the evaluator to be
247CM4cA a doublet, feeding the 516.7- and 518.6-keV levels.
247CM cA IA$1.9 {I1} was measured by 2003Ah07 for the doublet.
247CM G 68 2 S S
247CM G 83.7 2 S S
247CM G 289.3 1 0.070 7 [M1+E2] 0.9 7
247CMS G KC=0.7 6$LC=0.19 6$MC=0.049 13
247CMS G NC=0.014 4$OC=0.0034 9$PC=0.00064 21$QC=3.E-5 3
247CM L 518.59 7(3/2+) H
247CM A 5567 2 1.9 LE 10 GE
247CM cA E$From E|a(404.9 level)=5679.3 {I16} and the level energy difference
247CM2cA from least-squares fit to E|g's (recoil energy is taken into account).
247CM3cA E|a=5568 {I2}, measured by 2003Ah07, is assumed by the evaluator to be
247CM4cA a doublet, feeding the 516.7- and 518.6-keV levels.
247CM cA IA$1.9 {I1} was measured by 2003Ah07 for the doublet.
247CM G 113.7 1 0.024 5 [M1+E2] 8 3
247CMS G LC=5.5 20$MC=1.5 7
247CMS G NC=0.41 18$OC=0.10 4$PC=0.018 6$QC=0.0005 4
247CM G 291.20 8 0.30 3 [M1+E2] 0.9 7
247CMS G KC=0.7 6$LC=0.19 6$MC=0.048 13
247CMS G NC=0.013 4$OC=0.0033 9$PC=0.00063 21$QC=3.E-5 3
247CM L 581.67 8(5/2+) H
247CM A 5505 2 0.27 5 33 7
247CM cA IA$0.060 {I17} from I(|g+ce) imbalances
247CM G 315.8 1 0.024 3 [M1+E2] 0.7 6
247CMS G KC=0.5 5$LC=0.15 6$MC=0.037 12
247CMS G NC=0.010 3$OC=0.0026 8$PC=0.00049 18$QC=2.6E-5 21
247CM G 354.3 1 0.013 2 [M1+E2] 0.5 4
247CMS G KC=0.4 4$LC=0.10 5$MC=0.026 10
247CMS G NC=0.0072 25$OC=0.0018 7$PC=0.00034 14$QC=1.9E-5 16