245AM 249BK A DECAY 2013AH03 23NDS 202305
245AM H TYP=FUL$AUT=C.D. Nesaraja$CIT=NDS 189, 1 (2023)$CUT=14-Feb-2023$
245AM c 2013Ah03: 10-|mg of purified {+249}Bk was obtained from ORNL in which,
245AM2c 1-|mg {+249}Bk source was used for measuring the |g-ray singles and
245AM3c 0.3-|mg of {+249}Bk for the |g|a-coin measurement.
245AM4c Measured E|g, I|g, |g|g-coin, |g|a-coin. Low energy photon
245AM5c spectrometer (LEPS) was used to measure |g rays and a Passivated
245AM6c Implanted Planar Silicon detector (PIPS) to detect the |a particles.
245AM7c A Ge detector was also used for the |g|g-coin measurement.
245AM8c The E|a and I|a were measured at ANL
245AM9c with the Argonne double-focusing magnetic |a spectrometer.
245AMac Deduced levels, J, |p, |a hindrance factors using radius
245AMbc parameter= 9.323 fm
245AM c 1994Po30: |a spectra were measured with a Si(Au) detector
245AM2c with 35 keV energy resolution for the 5486 keV |a-line in {+241}Am.
245AM3c Measured M and L x-rays.
245AM c 1993Po20: {+249}Bk produced at the high flux reactor and subsequently
245AM2c purified and extracted. The |g-rays were measured with a Ge(Li)
245AM3c detector with FWHM= 2.0 keV and 3.0 keV for the 122 keV {+57}Co and
245AM4c 661.6 keV {+137}Cs lines, respectively. Measured E|g and I|g.
245AM c 1975Ba27, 1971Bb10, 1969Ba57: |a decay from {+249}Bk was studied using
245AM2c a double focus magnetic |a spectrograph. The energies were determined
245AM3c for the intense |a groups. The energy of the main |a group in both
245AM4c 1971Bb10 and 1969Ba57 were different due to the correction made to the
245AM5c energy standard {+242}Cm |a{-0} group. 1975Ba27 determined E|a
245AM5c and I|a for ten |a groups and identified three rotational bands with
245AM6c the configurations: 5/2-[523], 5/2+[624], and 7/2+[633].
245AM c 1966Ah02: {+249}Bk produced from neutron irradiation of Cm at LBNL.
245AM2c The |a decay particles from the isolated and purified
245AM3c {+249}Bk were analyzed with a double-focusing magnetic spectrograph.
245AM4c The |g singles were measured with Ge(Li) detectors.
245AM5c Weak alpha groups were observed in coincidence with |g-rays.
245AM6c E|a values in 1966Ah02 have been revised by 2013Ah03 by 1.0 keV using
245AM7c new energies of {+238}Pu and {+240}Pu as an internal calibration
245AM c 1956Ch77: {+249}Bk produced from neutron irradiation of Pu.
245AM2c Measured |g|a-coin, from decay of {+245}Bk . Deduced
245AM3c E|g, I|g, E|a and I|a, I(K x-ray) and I(L x-ray)
245AM c
245AM cA E,IA$From 2013Ah03
245AM c
245AM tG $ ----------------------------------------------------------
245AM tG $ Measured x-ray intensities (2013Ah03)
245AM tG $ Energy Intensity x-ray
245AM tG $
245AM tG $ 102.04 {I4} 0.35 {I3} Am K{-|a2}
245AM tG $ 106.48 {I4} 0.53 {I4} Am K{-|a1}
245AM tG $ 119.26 {I4} Am K{-|b3}
245AM tG $ 119.26+120.31 0.22 {I2} Am K{-|b3}+Am K{-b1}
245AM tG $ 120.31 {I4} Am K{-|b1}
245AM tG $ 123.8 {I3} 0.08 {I1} Am K{-|b2}
245AM tG $
245AM tG $ See 1990Po14 for Intensities of M and L x-ray emissions
245AM tG $ ----------------------------------------------------------
245AM c
245AM cG E,RI$From 2015Ah03
245AM cG M,MR$From Adopted Gammas. Multipolarities from 2013Ah03,
245AM2cG based on I|g- and I(x-ray) data are given in comments
245AM cL E$Level energies are calculated from Q|a({+249}Bk)=5521.0 {I14},
245AM2cL (2021Wa16) and measured E|a's.
245AM cL J$From Adopted Levels
245AM CL BAND(A)$ |p5/2[642] band
245AM CL BAND(B)$ |p5/2[523] band
245AM CL BAND(C)$ |p3/2[521] band
245AM CL BAND(D)$ |p7/2[633] band
245AM cA HF$The nuclear radius parameter r{-0}({+245}Am)=1.48943 {I52}
245AM2cA is deduced from interpolation (or unweighted average) of radius
245AM3cA parameters of the adjacent even-even nuclides.
245AM DG CC$FROM BrIcc v2.3e (17-Jun-2020) 2008Ki07, "Frozen Orbitals" appr.
249BK P 0.0 7/2+ 327.2 D 3 5521.0 14
249BK cP T$Measured by 2014Ch47 from growth of daughter activity {+249}Cf
249BK2cP and |g-ray intensities from subsequent decay of {+249}Cf. The most
249BK3cP recent adopted T{-1/2} for {+249}Bk prior to 2014Ch47
249BK4cP is 330 d {I4} (2011Ab07)
249BK cP J$From {+249}Bk Adopted Levels in the ENSDF database
249BK cP QP$From 2021Wa16
245AM N 1.0 1.37E-5 10
245AM PN 3
245AM cN BR$From 1969Mi08. Based on the argument of 2013Ah03 who preferred
245AM2cN %|a=0.00137 {I10} over 0.00145 {I8}, both of which are from two
245AM3cN separate methods in 1969Mi08. The former value does not depend on
245AM4cN detector solid angle and the initial analysis of the number of
245AM5cN {+249}Bk atoms. The most
245AM6cN recent adopted %|a for {+249}Bk for {+249}Bk prior to 2014Ch47
245AM7cN is 1.45|*10{+-3} {I8} {I4} (2011Ab07)
245AM L 0.0 5/2+ 2.05 H 1 A
245AM cL T$From Adopted Level
245AM A 5433 2 6.57 10 98 8
245AM L 19.3 25 7/2+ A
245AM A 5414 2 69.7 3 7.1 6
245AM cA IA$Large intensity to the 7/2 member of the ground-state band is
245AM2cA due to the strong Coriolis mixing between the 5/2+[624] and
245AM3cA 7/2+[633] orbitals (2015Ah03,1966Ah02)
245AM L 28.27 13 (5/2-) B
245AM cL E$From Adopted Level
245AM A 5405 S
245AM cA E$Not observed as it was masked by the strong E(|a)=5414 keV
245AM G 28.0 1 0.10 AP(E1) 3.75 6
245AMS G LC=2.78 5$MC=0.729 12
245AMS G NC=0.1950 33$OC=0.0443 7$PC=0.00588 10$QC=0.0001379 21
245AM L 47.8 25 (9/2+) A
245AM A 5386 2 17.9 2 18.7 15
245AM L 71.1 25 (7/2-) B
245AM A 5363 2 0.077 8 3.14E3 41
245AM L 88.4 25 (11/2+) A
245AM A 5346 2 2.60 5 73 6
245AM L 124.0 25 (9/2-) B
245AM A 5311 2 0.03 1 3.8E3 13
245AM L 134.2 25 (13/2+) A
245AM A 5301 2 0.046 7 2.15E3 37
245AM L 154.5 25 (3/2-) C
245AM A 5281 2 0.09 1 8.2E2 11
245AM L 187.0 25 (5/2-) C
245AM A 5249 2 0.09 1 516 70
245AM L 231.7 25 (7/2-) C
245AM A 5205 2 0.048 7 504 83
245AM L 292.7 25 (9/2-) C
245AM A 5145 2 0.018 5 5.5E2 16
245AM L 328.3 25 7/2+ D
245AM A 5110 2 2.70 5 2.13 17
245AM G 280.36 4 0.10 1 (M1+E2) 0.7 +7-6 1.1 4
245AMS G KC=0.9 4$LC=0.21 4$MC=0.054 8
245AMS G NC=0.0147 20$OC=0.0037 5$PC=0.00068 13$QC=3.6E-5 15
245AM G 308.26 4 0.24 2 M1(+E2) 0.6 9 0.9 4
245AMS G KC=0.7 4$LC=0.17 4$MC=0.041 9
245AMS G NC=0.0113 24$OC=0.0028 6$PC=5.3E-4 14$QC=3.0E-5 15
245AM cG M$M1 in 2013Ah03
245AM G 327.45 4 1.06 6 M1(+E2) 0.5 7 0.85 33
245AMS G KC=0.66 29$LC=0.145 34$MC=0.036 7
245AMS G NC=0.0098 20$OC=0.0025 5$PC=0.00046 11$QC=2.7E-5 11
245AM cG RI$Weighted average of 1.05 {I9} and 1.06 {I7} determined by two
245AM2cG separate methods (2013Ah03). Former value from measured absolute
245AM3cG intensity (per 100 decays of {+249}Bk)=0.00144 {I8} and the latter
245AM4cG value deduced from intensity balance at level 327-keV.
245AM cG M$M1 in 2013Ah03
245AM L 397.4 25 9/2+ D
245AM A 5042 2 0.12 1 16.7 19
245AM L 475.6 25 11/2+ D
245AM A 4965 4 0.01 AP 59 AP