38K 38CA EC DECAY (443.76 MS) 2015PA32,1996An09,2015BL0218NDS 201810
38K H TYP=FUL$AUT=JUN CHEN$CIT=NDS 152, 1 (2018)$CUT=30-Sep-2017$
38K c 2015Pa32(also 2014Pa09): {+38}Ca source was produced by
38K 2c {+1}H({+39}K,2n) reaction with a 30 MeV/nucleon {+39}K beam provided by
38K 3c K500 superconducting cyclotron at Texas A&M University incident on a
38K 4c hydrogen gas cell. Reaction products were separated using the MARS
38K 5c spectrometer and nearly pure {+38}Ca beam were implanted in a tape
38K 6c system, collected for 1.6 seconds, moved to a shielded area and counted
38K 7c for 1.54 seconds with a HPGe detector for |g rays and a scintillator
38K 8c for positron measurements. Measured E|g, I|g, E|b, I|b, |b|g-coin.
38K 9c Deduced levels, |b decay branching ratios, log {Ift}. Comparisons with
38K ac available data and shell-model calculations.
38K c 1996An09: {+38}Ca source was produced by bombarding a Ti target with
38K 2c the 1 GeV pulsed proton beam from the PS Booster at CERN. Fragments
38K 3c were separated with the on-line mass separator ISOLDE and directed
38K 4c into a moving tape system. |g rays were detected with two Ge detectors
38K 5c and |b particles were detected with a thin cylindrical plastic
38K 6c scintillator surrounding the tape in a near 4|p geometry. Measured E|g,
38K 7c I|g, |g|g-coin, |b|g-coin. Deduced levels, |b decay branching ratios,
38K 8c log {Ift}. Comparisons with available data and shell-model
38K 9c calculations.
38K c 2015Bl02: {+38}Ca was produced by projectile fragmentation of {+40}Ca
38K 2c beam of 50.5 MeV/nucleon on a natural nickel target and separated by
38K 3c LISE3 separator at GANIL. Isotope identification was performed
38K 4c event-by-event using a plastic scintillator (0.45 mm thick) coupled to
38K 5c two photomultipliers used in coincidence to measure energy loss and
38K 6c time-of-flight. {+38}Ca isotopes were transported after implanting
38K 7c on a tape to a detection setup for decay measurements. |b particles
38K 8c were counted by a plastic scintillator (5 mm thick) and |g rays by a
38K 9c HPGe detector. Measured E|g, I|g, E|b, I|b, |b|g-coin. Deduced levels,
38K ac |b-decay branching ratios and |g-ray emission probabilities, log {Ift},
38K bc parent half-life. Comparisons with shell-model calculations.
38K c Others:
38K c 1980Wi13 (also 1980WiZQ thesis): measured E|g, I|g
38K c 1969Ga27, 1968Ka15: measured E|g, I|g, isotopic half-life
38K c 2006Bo11 (also 2007Ri08): mass measurement of {+38}Ca (penning-trap
38K 2c method), deduced Q value
38K c 1998Ba80: measured |b|g coin, search for the feeding of 2993, 0- state
38K c 1972Zi02: measured isotopic half-life
38K D 1970AsZV (THESIS): MEASURED HALF-LIFE, EG, IG
38K c 1957Cl23: first isotopic identification and half-life measurement
38K c Review and analysis of superallowed |b transition:
38K 2c 2015Ha07 (also 2006Ha12,2005Ha27,2005Ha15,2005Ha65)
38K D THEORY: 1991Hi18
38K c This decay is important from the point-of-view of superallowed
38K 2c (0+ to 0+) |b transition from {+38}Ca g.s. to 130.4, 0+ isomer
38K 3c in {+38}K.
38K c The following levels and gammas listed by 1980Wi13 have not
38K 2c been included here since the intensities of the deexciting |g rays
38K 3c were given as upper limits only but which have not been reported by
38K 4c 1996An09 with a better detection sensitivity:
38K 5c 2402 (1944|g, I|g<1.1); 2646 (2646|g, I|g<0.46); 3316 (3185|g,
38K 6c I|g<0.29, 3316|g, I|g<0.27); 3739 (3739|g, I|g<0.36); 3841 (3710|g,
38K 7c I|g<0.59); 4214 (4084|g, I|g<0.29); 4318 (4318|g, I|g<0.19); 4395
38K 8c (4395|g, I|g<0.37)
38K c Total decay energy deposit of 6613 keV {I9} calculated by RADLIST
38K 2c code is in a good agreement with the expected value of 6612 keV (all to
38K 3c 130 level)
38K cG E$From Adopted Gammas, unless otherwise noted.
38K cG RI$Relative intensity normalized to I(1567|g)=100
38K cE TI$From I|g intensity imbalance at each level, based on measured
38K 2cE I(|e+|b{++}) branching to 1698 level
38K cL E,J,T$From Adopted Levels. Level energies are round-off values.
38CA P 0 0+ 443.76 MS 35 6742.26 6
38CA cP QP$From 2017Wa10
38CA cP T$From Adopted Levels of {+38}Ca.
38K N 0.1946 14 1.0 1.0
38K cN NR$From |S(|g from 1698 level)-|S(|g to 1698 level)=19.48 {I13},
38K 2cN the adopted measured I(|e+|b{++}) branching to 1698 level (2015Pa32).
38K PN 3
38K L 0 3+
38K L 130.2 0+ 924.4 MS 3 M
38K 2 L %IT=0.0330 43$ %EC+%B+=99.9670 43
38K cL $%IT from Adopted Levels
38K E 77.14 18 0.0568 6 3.487 1 77.20 18
38K S E EAV=2601.07$CK=0.0006606 1$CL=6.482E-5 1$CM+=1.0497E-5 2
38K cE TI$from 100-|S(I(|e+|b{++}) to other levels). Note that the value of
38K 2cE 76.52 in 1996An09 is a calculated value from expected log {Ift}=3.486
38K dE $Superallowed F|t=3076.4 s {I72} (2015Pa32)
38K L 458.5 1+
38K E 2.84 6 0.002506 4.80 1 2.84 6
38K S E EAV=2440.34 30$CK=0.0007903 3$CL=7.755E-5 3$CM+=1.2558E-5 5
38K cE TI$1996An09 give 2.96 {I15}
38K G 328.1 2 14.96 26
38K cG RI$weighted average of 14.89 {I26} (2015Pa32), 15.0 {I10} (1996An09),
38K 2cG 12.6 {I16} (1980Wi13), and 11.8 {I13} (2015Bl02). The value from
38K 3cG 2015Bl02 is deduced from absolute I|g(328)=2.30 {I25} relative to
38K 4cG absolute I|g(1568)=19.51 {I27} measured by 2015Bl02.
38K L 1697.7 1+
38K E 19.44 13 0.0381 5 3.426 3 19.48 13
38K S E EAV=1836.21 25$CK=0.0017540 7$CL=0.000172$CM+=2.788E-5 1
38K cE TI$weighted average of directly measured values of 19.49 {I27}
38K 2cE (2015Bl02) and 19.48 {I13} (2015Pa32). Note that the value of
38K 3cE 19.99 {I30} in 1996An09 is deduced from calculated I|b=76.5 to 130
38K 4cE level based on expected log {Ift}=3.4875 {I9} for superallowed (0+ to
38K 5cE 0+) |b transitions
38K G 1239 0.26 5
38K cG RI$weighted average of 0.36 {I13} (2015Pa32) and 0.24 {I5} (1996An09).
38K 2cG Other: <1.0 (1980Wi13)
38K G 1567.4 2 100
38K cG E$1567.7 {I5} from 1968Ka15
38K G 1698 0.08 4
38K cG RI$from 1996An09. Others: <0.08 (2015Pa32), <0.82 (1980Wi13)
38K L 2993 0- ?
38K cL E$reported in 1998Ba80
38K E 0.0046 LT 2.9E-5 LT 6.3 GT 0.0046 LT ?
38K S E EAV=1214.54$CK=0.005578$CL=0.0005477$CM+=8.871E-5
38K cE TI$limit from measurement by 1998Ba80 at the 95% confidence level
38K G 2534 0.021 LT ?
38K cG E,RI$from 1998Ba80
38K L 3341.1 1+
38K E 0.34 4 0.0032 4 4.16 6 0.34 4
38K S E EAV=1049.25 38$CK=0.008390 9$CL=0.0008240 9$CM+=0.00013345
38K cE TI$1996An09 give 0.369 {I13}
38K G 1643 0.25 15
38K cG RI$unweighted average of 0.10 {I7} (2015Pa32) and 0.40 {I5} (1996An09).
38K 2cG Other: <1.0 (1980Wi13)
38K G 2883 0.06 4
38K cG RI$from 2015Pa32. 2015Pa32 claim that the value of 0.7 {I2} from
38K 2cG 1996An09 could be a misprint according to the |g spectrum in Fig.5 of
38K 3cG 1996An09. Other:<0.33 (1980Wi13)
38K G 3210.7 7 1.44 9
38K cG E$3210 {I2} from 1969Ga27
38K cG RI$weighted average of 1.50 {I9} (2015Pa32), 1.38 {I10} (1996An09),
38K 2cG 1.39 {I15} (1980Wi13), and 1.4 {I5} (2015Bl02). The value from
38K 3cG 2015Bl02 is deduced from absolute I|g(3210)=0.28 {I10} relative to
38K 4cG absolute I|g(1568)=19.51 {I27} measured by 2015Bl02.
38K G 3341 0.24 LT ?
38K cG E,RI$|g from 1980Wi13
38K L 3855.8 1+
38K E 0.025 12 0.0004923 4.8 2 0.025 12
38K S E EAV=809.35 47$CK=0.01745 3$CL=0.001714 3$CM+=0.0002776 5
38K G 3725.4 19 0.13 6
38K cG RI$unweighted average of 0.07 {I3} (2015Pa32) and 0.19 {I2} (1996An09).
38K 2cG Other: <0.36 (1980Wi13)
38K L 3976.3 1+
38K E 0.110 12 0.0027 3 4.05 5 0.113 12
38K S E EAV=753.32 37$CK=0.02136 3$CL=0.002098 3$CM+=0.0003399 5
38K G 3516.4 14 0.04 3
38K cG RI$from 1996An09. Others: <0.03 (2015Pa32), <0.42 (1980Wi13)
38K G 3848.0 19 0.54 5
38K F G FL=130.2
38K cG RI$weighted average of 0.51 {I7} (2015Pa32), 0.56 {I5} (1996An09),
38K 2cG and 0.6 {I5} (2015Bl02). The value from 2015Bl02 is deduced from
38K 3cG absolute I|g(3848)=0.12 {I9} relative to absolute I|g(1568)=19.51 {I27}
38K 4cG measured by 2015Bl02. Other: <0.81 (1980Wi13)
38K L 4174.9 (1)+
38K E 0.004 2 0.0001 1 5.3 2 0.004 2
38K S E EAV=663.38 55$CK=0.03057 8$CL=0.003004 7$CM+=0.0004865 1
38K G 3716 0.02 1
38K cG RI$from 1996An09. Others: <0.05 (2015Pa32), <0.45 (1980Wi13)