44CA 44SC EC DECAY (4.0420 H) 1990ME15,1976CO06,1983GU1123NDS 202306
44CA H TYP=FUL$AUT=Jun Chen and Balraj Singh$CIT=NDS 190, 1 (2023)$
44CA2 H CUT=20-Jun-2023$
44CA c 1990Me15, 1976Co06: Source of {+44}Sc was prepared by the (|g,n)
44CA2c reactions on natural Sc at the Livermore linear accelerator or by the
44CA3c (|a,dxn) reaction on natural Ca metal at the Berkeley 88-inch
44CA4c cyclotron. |g rays were detected with a Ge(Li) detector. Measured E|g,
44CA5c I|g. Deduced levels, branching ratios, log| {Ift}.
44CA d I|g in 1990Me15 and 1976Co06 are the same but E|g values are different.
44CA2d Value from 1990Me15 are considered to supersede those in 1976Co06
44CA c 1983Gu11: Ge(Li) detectors. Measured E|g, I|g. Deduced levels, I|b.
44CA c 1973Si05: Activity of {+44}Sc from a {+44}Ti source deposited on thin
44CA2c mylar in a spot of 0.3 cm diameter. A 25 cm{+3} and a 70 cm{+3}
44CA3c Ge(Li) detectors for detecting |g-rays. Measured E|g, I|g, |g|g-coin.
44CA4c Deduced levels, branching ratios.
44CA c Other main references: 1990Sc08, 1974HeYW
44CA c Others:
44CA c T{-1/2}({+44}Sc): 1954An25, 1950Br52, 1948Wa13, 1945Hi05, 1942Sm01,
44CAxc 1940Wa01.
44CA c Isotopic identification: 1937Wa07, 1937Wa04, 1937Wa05, 1937Po04,
44CA2c 1938Bu05, 1938Co01, 1938Ge01, 1939Bo05, 1940Wa01,
44CA3c 1946Bl27, 1950Br52, 1951Ba84, 1954An25, 1954Sh30, 1963Di06, 1963Kl06,
44CAxc 1973Si05.
44CA D Production cross sections (recent papers): 1999Fa08 ((p,^X)
44CA2D reaction on Fe and Ca), 1999He20 (TI(A,^X))
44CA c |b{++}: 1937Ja03, 1942Sm01, 1950Br52, 1950Cu14, 1954La40, 1955Bl23,
44CAxc 1958Ko92, 1934Zy01.
44CA c |g,|g|g: 2006Va23, 1981Yu03, 1973Si05, 1973Gr28, 1972Vo03, 1972Ta36,
44CA2c 1971Ok03, 1970Le05, 1970Ei07, 1968Ki03, 1968Wa21, 1963Di06, 1961Mc03,
44CAxc 1955Bl23, 1950Br52, 1950Cu14
44CA c |g|g(|q): 1968Wa21, 1971Ok03
44CA c |b|g(circ pol): 1965Ma06, 1962Ma13, 1962Bl02, 1958Bo90
44CA c |e/|b{++}: 1983Ba41 (also 1976St21)
44CA c The total released energy calculated by RADLIST is 3652.9 {I20}, as
44CA2c compared with 3652.7 {I18} (2021Wa16), indicating completeness of the
44CA3c {+44}Sc decay scheme.
44CA cE $The log| {Ift} systematic trend of second-forbidden
44CA2cE transitions suggests log| {Ift}>10.6 (1998Si17) for the 2+ to 0+ |e
44CA3cE transition to {+44}Ca ground state. This limit corresponds to
44CAxcE I|e<0.005%.
44CA cE TI$From %I|g intensity balance at each level
44CA cE IB,LOGFT$Calculated using the LOGFT code
44CA cG M,MR$From the Adopted Gammas
44CA cL J,T$From the Adopted Levels
44CA cL E$From a least-squares fit to |g-ray energies.
44SC P 0.0 2+ 4.0420 H 25 3652.7 18
44SC cP J,T$From {+44}Sc Adopted Levels
44SC cP QP$From 2021Wa16
44CA N 9.99E-2 3 1.0
44CA cN NR$assuming no |e+|b{++} to g.s. and |SI(|g+ce)(g.s.)=100%.
44CA PN 4
44CA L 0.0 0+
44CA L 1157.045 14 2+ 2.94 PS 12
44CA E 94.278 11 4.696 11 5.3257 22 98.974 16
44CAS E EAV=630.2 8$CK=0.0427 8$CL=0.00410 8$CM+=6.86E-4 14
44CA cE IB$94.27 {I5} from ratio |e/|b{++}=0.0499 {I5}, weighted average of
44CA2cE 0.0499 {I5} (1983Ba41) and 0.0497 {I23} (1976St21). From the
44CA3cE annihilation radiation intensity of 188 {I3} (1990Sc08) one obtains
44CA4cE I|b{++}(1157)=94.0% {I15} and I|e(1157)=4.97% {I15}. These values are
44CA5cE consistent with values above but less accurate.
44CA G 1157.022 15 1000 3 E2
44CAS G CC=6.92E-5 10$KC=5.93E-5 8$LC=5.09E-6 7$MC=6.05E-7 8
44CAS G NC=3.43E-8 5$IPC=4.15E-6 6
44CA2 G %IG=99.8867 30
44CA cG E$weighted average of 1157.031 {I15} (1990Me15), 1157.015 {I15}
44CA2cG (1983Gu11), 1156.92 {I15} (1974HeYW), 1156.9 {I6} (1973Si05), 1157.0
44CA3cG {I3} (1970Ei07), 1156.6 {I5} (1968Wa21).
44CA cG RI$from 1990Me15. Other: 1000 (1983Gu11), 1000 {I5} (1974HeYW),
44CA2cG 1000 {I5} (1968Wa21)
44CA L 2656.527 19 2+ 30 FS 3
44CA E 1.021 15 5.177 10
44CAS E CK=0.8988 5$CL=0.08665 32$CM+=0.01452 17
44CA G 1499.449 15 9.10 15 M1+E2 -0.123 17
44CAS G CC=9.68E-5 14$KC=2.93E-5 4$LC=2.508E-6 35$MC=2.98E-7 4
44CAS G NC=1.695E-8 24$IPC=6.47E-5 9
44CA2 G %IG=0.909 15
44CA cG E$weighted average of 1499.489 {I25} (1990Me15), 1499.436 {I15}
44CA2cG (1983Gu11), 1499.20 {I20} (1974HeYW), 1499.4 {I3} (1973Si05), 1499.6
44CA3cG {I6} (1970Ei07), 1499.0 {I5} (1968Wa21).
44CA cG RI$weighted average of 9.0 {I2} (1990Me15), 9.22 {I37}
44CA2cG (1983Gu11), 9.0 {I10} (1974HeYW), 9.1 {I4} (1973Si05), 9.2 {I5}
44CA3cG (1968Wa21), 9.12 {I15} (1990Sc08).
44CA cG MR$values from this dataset: -0.137 {I17} (1968Wa21), -0.07 {I3}
44CA2cG (1971Ok03).
44CA G 2656.48 4 1.12 3 E2
44CAS G CC=0.000643 9$KC=1.185E-5 17$LC=1.014E-6 14$MC=1.204E-7 17
44CAS G NC=6.85E-9 10$IPC=0.000630 9
44CA2 G %IG=0.1119 30
44CA cG E$weighted average of 2656.478 {I30} (1990Me15), 2656.435 {I50}
44CA2cG (1983Gu11), 2657.14 {I20} (1974HeYW), 2656.4 {I5} (1973Si05), 2656.6
44CA3cG {I6} (1970Ei07), 2655.9 {I8} (1968Wa21).
44CA cG RI$weighted average of 1.11 {I4} (1990Me15), 1.11 {I3} (1983Gu11), 1.4
44CA2cG {I5} (1974HeYW), 1.3 {I1} (1973Si05), 0.9 {I1} (1968Wa21), 1.15 {I6}
44CA3cG 1990Sc08.
44CA L 3301.47 5 2+ 35 FS 18
44CA E 0.0051 8 6.57 7
44CAS E CK=0.8976 5$CL=0.08767 33$CM+=0.01471 17
44CA G 2144.33 10 0.037 7
44CA2 G %IG=0.0037 7
44CA cG E$weighted average of 2144.3 {I1} (1990Me15), 2144.43 {I20}
44CA2cG (1983Gu11), 2144.8 {I8} (1973Si05)
44CA cG RI$weighted average of 0.02 {I2} (1990Me15), 0.039 {I7} (1973Si05).
44CA2cG Other: 0.035 (1983Gu11). Accurate value is lacking due to
44CA3cG large corrections to this peak from single escape of 2656.5|g
44CA G 3301.35 6 0.014 4 E2
44CAS G CC=0.000919 13$KC=8.37E-6 12$LC=7.16E-7 10$MC=8.50E-8 12
44CAS G NC=4.84E-9 7$IPC=0.000910 13
44CA2 G %IG=0.0014 4
44CA cG E$weighted average of 3301.3 {I1} (1990Me15), 3301.361 {I55}
44CA2cG (1983Gu11), 3301.6 {I15} (1973Si05)
44CA cG RI$unweighted average of 0.0064 {I8} (1990Me15), 0.016 {I2}
44CA2cG (1983Gu11), 0.018 {I3} (1973Si05)
44CA L 3307.941 26 3- 0.15 PS 6
44CA E 0.0011 3 7.22 12 ?
44CAS E CK=0.8976 5$CL=0.08770 33$CM+=0.01471 17
44CA G 2150.840 22 0.011 3 ?
44CA2 G %IG=0.00110 30
44CA cG E$from {+44}K decay (1976Co06,1990Me15)
44CA cG RI$|g ray reported by 1976Co06 (1990Me15) only. Its existence
44CA2cG and assignment is considered (evaluator) uncertain due to lack
44CA3cG of confirmation in other studies of {+44}Sc decay