243AM 243PU B- DECAY 1969FR01,1969HO10 14NDS 201408
243AM H TYP=FUL$AUT=C.D. Nesaraja, E.A. McCutchan$CIT=NDS 121, 695 (2014)$
243AM2 H CUT=30-Sep-2013$
243AM c 1977Dr07: {+242}Pu targets were irradiated with neutrons at a fast
243AM2c pulsed reactor followed by radiochemical separation. |b decay of
243AM3c {+243}Pu detected with a |b scintillation counter. Measured T{-1/2}
243AM4c and |b energy.
243AM c 1969Fr01: {+242}Pu targets were irradiated with neutrons at the
243AM2c Argonne CP-5 reactor at two separate irradiations out of which one
243AM3c was followed by chemically and mass separation to identify the weak
243AM4c and high energy |g-rays. |g- singles and |g|g coincidence were
243AM5c measured using 2 cm{+3} Ge(Li) and NaI(Tl) detectors. Conversion
243AM6c electrons were measured with a Si(Li) detector with FWHM=2.8 keV for
243AM7c the 155.8 keV {+243}Cm electron line
243AM c 1969Ho10: {+242}Pu targets were irradiated with neutrons at the Los
243AM2c Alamos Omega West Reactor. Measured conversion electrons, X-ray,
243AM3c |g's, |b's, |g|b coincidence with Si(Li) and Ge(Li) detector, and Kr-
243AM4c and Xe filled Reuter-Stokes proportional counters. Determined
243AM5c T{-1/2}({+243}Pu)
243AM c 1953En08: Enriched {+242}Pu irradiated at the Argonne Heavy Water
243AM2c Reactor followed by chemical separation. Gamma and beta spectrums and
243AM3c |b|g coincidence measured with scintillation spectrometers.
243AM D CC$FROM BrIcc v2.3a (30-Jun-2013) 2008Ki07, "Frozen Orbitals" appr.
243AM cB IB$I|b's have been deduced from intensity balance at each level,
243AM2cB except where noted otherwise.
243AM CG E$From 1969Fr01 and 1969Ho10. Other measurements: 1953En08, 1956St48.
243AM cG E(F),RI(F)$From 1969Fr01
243AM cG E(H),RI(H)$From 1969Ho10.
243AM cG E(A),RI(A)$Weighted average from 1969Fr01 and 1969Ho10
243AM CG M$Deduced from CE measurements of 1969Ho10. Multipolarities in square
243AM2CG brackets are from the level scheme; they were not determined
243AM3CG experimentally.
243AM TG GG coincidences:
243AM2TG (84G)(XK,322.2,356.4,381.7,388.9,423.2 G's) (1969Fr01),
243AM3TG (84G)(CE 356.5,381.6 G's) (1969Ho10).
243AM4TG
243AM TG X-RAYS:
243AM2TG I(XK) relative to I(84G)=100
243AM3TG --------------------------------
243AM4TG E(x ray) 1969Fr01 1969Ho10
243AM5TG --------- ---------- ----------
243AM6TG 102.0 2 0.65 6 0.64 6 XKA2+101.3G
243AM7TG 106.4 2 0.90 9 0.82 8 XKA1
243AM8TG 119.8 3 0.38 5 0.30 3 XKB1P
243AM9TG 123.9 3 0.12 2 0.11 2 XKB2P
243AMaTG
243AMbTG
243AM CL J$From adopted levels.
243PU P 0.0 7/2+ 4.956 H 3 579 3
243AM N 0.23 AP 1.0 1.0 1.0
243AM cN NR$From |S(I|g+c.e.)(to {+243}Am g.s.)|? 40. I|b to ground state is
243AM2cN estimated as |? 60, from subtraction of coincidence spectrum
243AM3CN (|b-85|g coin.) and total |b spectrum in the Kurie plots of {+243}Pu
243AM4CN |b spectra (1953En08).
243AM PN 2
243AM L 0.0 5/2- 7364 Y 22
243AM cL T$From Adopted levels
243AM B 580 1060 AP 6.1 AP
243AMS B EAV=171.7 10
243AM CB E$Measured energies: E(B)=566 (1953En08), E(B)=578 10 (1969Ho10),
243AM2CB E(B)=580 10 (1977Dr07).
243AM CB IB$I|b{+-} AP 60% was measured by 1969Ho10 and 1953En08 for their 578
243AM2CB {I10} and 566 |b groups. Non-observation of coincidences between the
243AM3CB 566-keV |b's and L x-rays led to 1953En08 to conclude that the decay
243AM4CB was entirely to the ground state. 1969Ho10 postulate that their 578
243AM5CB {I10} |b group involves the ground state and 42-keV level and divide
243AM6CB their |b intensities into 49% and 9%, respectively. As 1969Ho10
243AM7CB provide no details on this separation, the evaluators adopt the
243AM8CB measurement of 1953En08.
243AM L 42.21 22 7/2-
243AM B 8.9 AP 6.8 AP
243AMS B EAV=157.73 99
243AM G 42.2 5 0.35 AP M1+E2 0.28 AP 149 AP 12 AP
243AML G FL=0.0
243AMS G LC AP 110$MC AP 28.9$NC AP 7.9$OC AP 1.94$PC AP 0.336$QC AP 0.0116
243AM CG $CC(L12)/CC(L3)=3.3 (1969Ho10); EL12C GT 9 from
243AM2CG ICE(L12)/RI(42.2G+41.9G)
243AM CG RI$from ICE(L) AP 39 (1969Ho10) and LC from BrICC (2008KI07)=110 for
243AM2CG M1+8% E2.
243AM L 84.00 15 5/2+ 2.34 NS 7
243AM cL T$From delayed |b{+-} -84 keV |g coincidence measurement (1969Fr01)
243AM B 490 1021 AP 6.3 AP
243AMS B EAV=144.08 98
243AM CB IB$I(B- to 84-KEV level)+I(B- to 109-KEV level) AP 26, deduced from
243AM2CB level scheme. ALAGA rule has been used by the evaluator to estimate
243AM3CB BETA intensities to each of these levels.
243AM CB $Measured energies and intensities: E(B)=468, IB=40% (scin,1953En08),
243AM2CB E(B)=485 10, IB AP 40% (semi,1969Ho10); the observed BETA was
243AM3CB assigned to a group of BETAS feeding the levels between 84 KEV and
243AM4CB 143 KEV.
243AM G 41.8 2 3.3 3 [E1] 1.33 3 1.77 AP
243AMF G FLAG=F
243AMS G LC=0.991 19$MC=0.252 5$NC=0.0675 13$OC=0.0157 3$PC=0.00231 5$
243AMS G QC=6.32E-5 11
243AM G 84.0 2 100 E1 0.214 4 28 AP C
243AML G FL=0.0
243AMS G LC=0.1605 25$MC=0.0397 6$NC=0.01072 17$OC=0.00257 4$PC=0.000422 7$
243AMS G QC=1.494E-5 23
243AM CG $Absolute photon intensity of 84G was determined by 1969Ho10 and
243AM2CG 1971Fi01: RI(84G)=27.6% (1969Ho10), 23% 2 (1971Fi01).
243AM CG $EL12C=0.12 2; L12/L3=3 (1969Ho10). See 1970Gr36 and 1971Vo13 for
243AM2CG calculations of penetration matrix elements.
243AM L 96.4 4 9/2-
243AM B 1.3 AP 7.5 AP
243AMS B EAV=140.06 98
243AM G 54 1 0.1 LE [M1+E2] 87 AP 2 LE
243AMF G FLAG=H
243AMX G L/T=0.72 20$M/T=0.20 17$N/T=0.08 8
243AMS G LC AP 64$MC AP 17.1$NC AP 4.7$OC AP 1.14$PC AP 0.193$QC AP 0.0051
243AM CG CC$for an analogous 9/2- to 7/2- transition of 5/2[523] band in
243AM2CG 237NP, MR=0.46 4 was determined.
243AM CG $EG=54.2 5 from level scheme.
243AM G 96.4 4 0.06 1 (E2) 20.4 5 0.30 AP
243AML G FL=0.0
243AMF G FLAG=F
243AMS G LC=14.8 4$MC=4.15 10$NC=1.15 3$OC=0.274 7$PC=0.0438 11$QC=0.000152 4
243AM CG $EL12C LE 17 from ICE(L12)/RI(96.4) (1969HO10)
243AM L 109.21 16 7/2+
243AM B 5 AP 6.9 AP
243AMS B EAV=135.91 97
243AM CB IB$From I(B- to 84-KEV level)+I(B- to 109-KEV level) AP 26, with I(B-
243AM2CB to 84-KEV level) AP 21 deduced from level scheme
243AM G 25.2 3 8 AP S
243AM CG $GAMMA not observed. EG is from level scheme.
243AM cG TI$The 25 |g is required by an intensity balance at the 109 level.
243AM2cG With I|b{+-} |? 5 and with I(|g+ce)(34 |g) taken |? 4, an intensity
243AM3cG balance gives I(|g+ce)(25|g) |? 8
243AM G 67 1 1.0 5 [E1] 0.386 17 0.32 AP
243AMF G FLAG=H
243AMS G LC=0.290 13$MC=0.072 3$NC=0.0194 9$OC=0.00463 20$PC=0.00074 3$
243AMS G QC=2.41E-5 9
243AM G 109.2 2 0.70 7 [E1] 0.1083 0.18 AP
243AML G FL=0.0
243AMF G FLAG=A
243AMS G LC=0.0813 12$MC=0.0200 3$NC=0.00541 8$OC=0.001310 20$PC=0.000221 4$
243AMS G QC=8.52E-6 13
243AM L 143.39 24 (9/2+)
243AM B 3.4 AP 6.9 AP
243AMS B EAV=125.00 96
243AM G 34 AP 3.5 GT
243AM cG E$From 1969Ho01
243AM CG TI$The authors (1969HO01) report ICE(L3) only. ICE(L3) value given in
243AM2CG Table 2 (1969HO10) is a typo and should be 0.05 2. The expected
243AM3CG multipolarity is M1+E2. ICE/ICE(L3)=3 for a pure M1 and 267 for pure
243AM4CG E2. The authors adopt a value of approximately 3 which makes the TI
243AM5CG value a lower limit assuming the M1 multipolarity.
243AM G 101.3 0.17 8 [E1] 0.1315 0.04 AP ?
243AMS G LC=0.0987 14$MC=0.0244 4$NC=0.00658 10$OC=0.001589 23$PC=0.000266 4$
243AMS G QC=1.002E-5 14
243AM CG $GAMMA was obscured by XKA2; energy is from level scheme.
243AM CG RI$Relative to RI(84G). Obtained from the observed I(XKA2)/I(XKA1)
243AM2CG =0.78 {I10}. This observed value was in excess of the reported value
243AM3CG of 0.57 in 1959WA11. Authors (1969HO10) report the excess of 0.21
243AM4CG relative to I(XKA1) was from the gamma intensity.
243AM L 189.2 11 (11/2+) ?
243AM G 45.8 0.0028 AP S
243AM CG $Transition was not observed; EG from level scheme. I(|g+ce)
243AM2CG intensity of AP 0.0028 from intensity balance at the 189-KEV level.
243AM L 407.2 5
243AM B 0.002 AP 8.9 AP
243AMS B EAV=45.69 86
243AM G 407.2 5 0.005 2 0.002 AP
243AMF G FLAG=H
243AM cG $1969Fr01 suspected this |g as an impurity, however, a higher purity
243AM2cG sample and an additional cycle of plutonium chemistry by 1969Ho10
243AM3cG verified that the 407.1 |g is associated with the decay of {+243}Pu
243AM cG TI$From 1969Ho10; authors assume a M1 transition with |a=0.564 from
243AM2cG BrICC (2008KI07)
243AM L 465.64 18 7/2+
243AM B 1.26 AP 5.5 AP
243AMS B EAV=29.53 82
243AM G 322.3 2 0.12 1 [M1] 1.071 0.057 AP
243AMF G FLAG=A
243AMS G KC=0.845 12$LC=0.1699 24$MC=0.0414 6$NC=0.01131 16$OC=0.00285 4$
243AMS G PC=0.000544 8$QC=3.45E-5 5
243AM G 356.4 2 0.58 3 M1 0.812 0.242 AP
243AMF G FLAG=A
243AMS G KC=0.641 9$LC=0.1286 19$MC=0.0313 5$NC=0.00856 12$OC=0.00215 3$
243AMS G PC=0.000412 6$QC=2.61E-5 4
243AM CG $EKC=0.6 1 from ICE(K)/RI(356.4) (1969Ho10).
243AM G 381.6 2 2.50 10 M1 0.674 0.96 AP
243AMF G FLAG=H
243AMS G KC=0.532 8$LC=0.1066 15$MC=0.0259 4$NC=0.00709 10$OC=0.00178 3$
243AMS G PC=0.000341 5$QC=2.16E-5 3
243AM CG $EKC=0.6 1, ELC LE 0.15 from ICE(K)/RI(381.7) (1969Ho10).
243AM G 423.2 2 * ?
243AM G 465.7 5 0.001 LE [E1] 0.01710 0.00023 LE
243AMF G FLAG=H
243AMS G KC=0.01367 20$LC=0.00259 4$MC=0.000625 9$NC=0.0001697 24$OC=4.22E-5 6$
243AMS G PC=7.78E-6 11$QC=4.28E-7 6
243AM L 532.4 3 (9/2+)
243AM B 0.028 AP 6.0 AP
243AMS B EAV=11.83 78
243AM G 343.0 5 0.0065 AP [M1] 0.903 0.0028 AP ?
243AMF G FLAG=H
243AMS G KC=0.712 11$LC=0.1430 21$MC=0.0348 5$NC=0.00951 14$OC=0.00239 4$
243AMS G PC=0.000458 7$QC=2.90E-5 5
243AM G 388.9 3 0.021 3 [M1] 0.640 0.0079 AP
243AMF G FLAG=A
243AMS G KC=0.505 8$LC=0.1011 15$MC=0.0246 4$NC=0.00673 10$OC=0.001693 24$
243AMS G PC=0.000324 5$QC=2.05E-5 3
243AM G 423.2 3 0.057 6 [M1] 0.508 0.0198 AP*
243AMS G KC=0.401 6$LC=0.0802 12$MC=0.0195 3$NC=0.00533 8$OC=0.001342 19$
243AMS G PC=0.000257 4$QC=1.627E-5 23
243AM G 448.7 5 0.001 AP [E2] 0.0725 0.00025 AP
243AMF G FLAG=F
243AMS G KC=0.0387 6$LC=0.0248 4$MC=0.00665 10$NC=0.00183 3$OC=0.000446 7$
243AMS G PC=7.73E-5 12$QC=1.90E-6 3