23NA 23NE B- DECAY 1974AL03,1963CA06,1957PE1221NDS 202101
23NA H TYP=FUL$AUT=M.S. Basunia{+#}, A. Chakraborty{+##}$
23NA2 H CIT=NDS 171, 1 (2021)$CUT=1-Jun-2020$
23NA c Other references: 1972Ch41, 1968Mo03, 1965La10, 1940Po01
23NA c 1974Al03: {+23}Ne was produced via {+22}Ne(d,p) reaction, E(d)=3.0 MeV.
23NA2c |J0.4 atm of Ne target in a gas cell was bombarded for 10 sec, gas was
23NA3c expanded through the trap to the cylindrical counting cell, internal
23NA4c dimension of 7.5 cm diameter and 2 cm height. 70 cm{+3} Ge(Li)
23NA5c detector, NE102 plastic scintillator. Measured E|g, I|g, {+23}Ne
23NA6c half-life; Deduced beta feeding to excited states from |g-ray intensity
23NA7c balance, log {Ift} values.
23NA c 1963Ca06: {+23}Ne was produced via {+23}Na(n,p) reaction by bombarding
23NA2c 100 g of sodium aluminum silicate in the core of the Oak Ridge research
23NA3c reactor. Emanating {+23}Ne was swept continuously by water vapor to the
23NA4c laboratory; vapor removed and contamination purged {+23}Ne gas was
23NA5c allowed to decay in a source volume; some of the ions formed following
23NA6c |b decay emerged from the volume as a beam, were analyzed by
23NA7c electrostatic and magnetic analyzer in tandem. Measured recoil energy
23NA8c spectrum from 100 to 500 eV; deduce electron-neutrino angular
23NA9c correlation coefficient; assuming {IV-A} (Vector-Axial vector)
23NAac interaction is valid - deduced g.s. and 1st excited state |b feeding
23NAbc in {+23}Na.
23NA c 1957Pe12: {+23}Ne was produced via {+23}Na(d,2p) reaction by
23NA2c bombarding NaCl powdered target, E{-d}=22 MeV. Active gases were swept
23NA3c by flow of helium to a source chamber of small volume at 100 ft away
23NA4c from the target. Contaminating activities were removed by activated
23NA5c coconut charcoal trap cooled with LN{-2}. |b particles were detected
23NA6c by a stilbene crystal, |g radiation was detected by two NaI(Tl)
23NA7c crystals. Measured E|g, I|g, |g-|g coincidence, E|b spectrum; deduced
23NA8c |b feeding to g.s. and excited states.
23NA c 1972Ch41: Source from {+22}Ne(d,p), E=2.5 MeV, beam chopper, 99.5%
23NA2c enriched {+23}Ne gas target cell (dimension not mentioned). 200 cycles
23NA3c of irradiation and counting. 25.5 cm{+3} Ge(Li) detector. Measured E|g,
23NA4c I|g, deduced log {Ift}, decay scheme. Some of the reported |g in
23NA5c 1965La10 were not observed.
23NA c 1968Mo03: Source from {+22}Ne(n,|g), E=thermal, in a circulating
23NA2c volume. 10 and 30 cm{+3} Ge(Li), NaI(Tl) detectors. Measured E|g, I|g,
23NA3c |g|g coincidence. Deduced decay scheme. Some of the reported |g in
23NA4c 1965La10 were not observed.
23NA c 1965La10: Source from {+22}Ne(n,|g), E=thermal, in a large volume cell
23NA2c (dimension not mentioned). NaI(Tl) and anthracene
23NA3c crystal. Measured E|g, I|g, |g|g-coin, and E|b. Proposed level scheme.
23NA4c Nine |g rays were placed from seven excited states. Four of the
23NA5c |g rays and four levels were not confirmed in later studies.
23NA c 1940Po01: {+23}Ne produced in {+22}Ne(d,p), E(d)=2.6 MeV.
23NA2c Measured E|b and half-life 43 s {I3} of {+23}Ne and |b-endpoint
23NA3c energy=4.1 MeV.
23NA c Sum of decay energies of this dataset is 4378 keV {I42}, as compared to
23NA2c Q(|b{+-})=4375.80 keV {I10} (2017Wa10) for {+23}Ne |b{+-} decay.
23NA c
23NA dG CC$From BrIcc v2.3b (16-Dec-2014) 2008Ki07, "Frozen Orbitals" appr.
23NE P 0.0 5/2+ 37.25 S 10 4375.80 10
23NA N 0.329 10 1.0 1.0
23NA cN NR$From |S\ I(|g+ce) to g.s.=33 {I1} (100 - 67 {I1} (1963Ca06)),
23NA2cN assuming 1% statistical uncertainty for the 440|g.
23NA PN 3
23NA cG E,M,MR$From Adopted Gammas. |g-ray energy reported in 1974Al03 is
23NA2cG listed in comments section.
23NA cG RI$1974Al03 present I|g relative to I|g(440)=33 (listed in comments).
23NA2cG Evaluators present I|g relative to I|g(440)=100. The uncertainties of
23NA3cG I|g (1974Al03) are statistical only. A larger systematic
23NA4cG uncertainty can be expected for the cylindrical gas cell
23NA5cG (diameter 7.5 cm and height 2 cm) counting geometry. However,
23NA7cG the recommend uncertainty of the absolute |g-ray emission
23NA8cG probability is expected to be valid due to the unique feature
23NA9cG of the decay scheme as I|g(1+|a)(440) represents 99.6% of |SI|g(1+|a)
23NAacG to the g.s. from excited states and the |b branching to
23NAbcG the g.s. and 1st excited state dominate the total I|b, (67+32)=99%,
23NAccG that yields the same uncertainties as %I|b=67 {I3}, 32 {I3} (1957Pe12),
23NAdcG 67 {I1}, 32 {I1} (1963Ca06), for the g.s. and 1st excited states,
23NAecG respectively. As a result, the uncertainty of the I|g(440) can be
23NAfcG considered equivalent to |DI|b(1st excited state at 440).
23NA cL E$From a least-squares fit to the |g-ray energies.
23NA cB IB$From |g-ray intensity balance.
23NA L 0.0 3/2+ STABLE
23NA B 67 1 5.27 1
23NAS B EAV=1980.02
23NA cB E$4383 {I8} (1963Ca06) and 4390 {I50} (1957Pe12).
23NA cB IB$67 {I1} (1963Ca06) and 67 {I3} (1957Pe12).
23NA L 440.3 9 5/2+
23NA B 31.9 10 5.38 2
23NAS B EAV=1764.82 45
23NA cB E,IB$E|b=3950 {I50} (1957Pe12). I|b=32 {I1} (1963Ca06) and 32 {I3}
23NA2cB (1957Pe12).
23NA G 440.5 6 100 M1+E2 +0.065 5 5.45E-5 8
23NA2 G %IG=32.9 10
23NA cG E$440 (1974Al03), 440.0 {I6} (1968Mo03)
23NA cG RI$33.0 (1974Al03)
23NA L 2076.9 7 7/2+
23NA B 1.10 6 5.82 2
23NAS B EAV=976.94 34
23NA cB E,IB$E|b=2.4 |* 10{+3} {I1} (1957Pe12). I|b=1.00 {I15} (1957Pe12)
23NA G 1636.6 8 3.03 12M1+E2 +0.19 1 1.12E-4
23NA2 G %IG=1.00 5
23NA cG E$1636 (1974Al03)
23NA cG RI$1.00~{I4} (1974Al03)
23NAS G KC=4.20E-6 6$LC=2.51E-7 4$MC=5.63E-9 8
23NAS G IPC=0.0001071 15
23NA G 2076.7 8 0.306 18E2(+M3) -0.14 14 3.50E-415
23NA2 G %IG=0.101 7
23NA cG E$2076 (1974Al03)
23NA cG RI$0.101 {I6} (1974Al03)
23NAS G KC=3.25E-6 20$LC=1.95E-7 12$MC=4.4E-9 3
23NAS G IPC=0.000346 15
23NA L 2981.8 7 3/2+
23NA B 0.065 4 6.13 3
23NAS B EAV=556.81 32
23NA G 2541.3 9 0.082 6M1+E2 -0.09 3 4.73E-4
23NA2 G %IG=0.0269 22
23NA cG E$2542 (1974Al03)
23NA cG RI$0.027 {I2} (1974Al03)
23NAS G KC=2.08E-6 3$LC=1.243E-7 18$MC=2.79E-9 4
23NAS G IPC=0.000470 7
23NA G 2981.7 8 0.115 6M1 6.51E-4
23NA2 G %IG=0.0378 23
23NA cG E$2982 (1974Al03)
23NA cG RI$0.038 {I2} (1974Al03)
23NAS G KC=1.637E-6 23$LC=9.81E-8 14$MC=2.20E-9 3
23NAS G IPC=0.000650 9