13N 13O EC DECAY 2005KN02 24NDS 202410
13N H TYP=FUL$AUT=J.H. Kelley, C.G. Sheu and J. E. Purcell$
13N 2 H CIT=NDS 198, 1 (2024)$CUT=1-Aug-2024$
13N c All daughter levels deexcite mainly by proton decay, except
13N 2c the ground state. The 3501 keV level has a small %I|g=0.0011 branch
13N 3c compared to it's main %p|?100 decay. Consequently, there
13N 4c is no observable |g emission following {+13}O |b{++} decay.
13N c
13N c 1965Mc09: {+13}O(|b+p), [from {+14}N(p,2n)], measured delayed p
13N 2c spectrum; analyzed proton groups at E{-p}=6.06 and 6.65 MeV;
13N 3c deduced E{-x}=8.77 {I4} and 9.49 {I4} MeV.
13N c 1970Es03: {+13}O(|b+p), [from {+14}N(p,2n)], measured delayed p
13N 2c spectrum, analyzed E{-p} groups; deduced I{-p}, E{-p}, I{-p}, I{-|b}
13N 3c and Log ft.
13N 4c (*Expected but not observed)
13N c E{-c.m.}=1.565 MeV from {+13}N{+*}(3.509) with I{-rel}=100;
13N c E{-c.m.}=1.01(*) MeV and 5.48 MeV {I5} from {+13}N{+*}(7.387)
13N 2c with I{-rel}=0.33 {I10};
13N c E{-c.m.}=2.56 MeV {I5} and 6.98 MeV from {+13}N{+*}(8.92)
13N 2c with I{-rel}=1.5 {I3} and 3.5 {I3}, resp.;
13N c E{-c.m.}=3.12 MeV {I5} and 7.58 MeV from {+13}N{+*}(9.52)
13N 2c with I{-rel}=0.43 {I15} and 0.8 {I1}, resp.;
13N c and E{-c.m.}=3.97 {I5} and 8.41(*) MeV from {+13}N{+*}(10.35)
13N 2c with I{-rel}=0.13 {I7}.
13N c 1990As01: {+13}O(|b+p) [from {+14}N(p,2n)], measured |b delayed
13N 2c I{-p}, E{-p}, I{-p}, I{-|b}.
13N c E{-c.m.}=1.568 MeV from {+13}N{+*}(3.511) with I{-p_rel}=100;
13N c E{-c.m.}=0.994 MeV and 5.433 MeV {+13}N{+*}(7.387)
13N 2c with I{-p_rel}=1.7 {I8} and 0.17 {I7}, resp.;
13N c E{-c.m.}=2.536 MeV and 6.975 MeV from {+13}N{+*}(8.918)
13N 2c with I{-p_rel}=1.44 {I25} and 4.83 {I51}, resp.;
13N c E{-c.m.}=3.094 MeV and 7.533 MeV from {+13}N{+*}(9.476)
13N 2c with I{-p_rel}=0.61 {I15} and 0.98 {I14}, resp.;
13N c E{-c.m.}=3.97 MeV {I5} and 8.42 MeV from {+13}N{+*}(10.36)
13N 2c with I{-p_rel}=0.12 {I8} and 0.05 {I3}. resp. Analyzed total I|b along
13N 3c with I{-p} from {+13}N{+*}(3.51) to obtain an absolute
13N 4c I{-p}(3.51)=I|b(3.51)=9.8% {I20}; this implies I|b(g.s.)=89.2% {I22}.
13N c
13N c 2005Kn02: {+13}O ions were produced at the IGISOL facility via
13N 2c the {+14}N(p,2n)reaction by impinging an E{-p}=45 MeV beam on a
13N 3c 1 mg/cm{+2} target. The {+13}O ions recoiled out of the target and
13N 4c were collected in a helium carrier gas which delivered them to the
13N 5c mass separator. The ions were then implanted into a 30 |mg/cm{+2}
13N 6c carbon foil. The implantation target was surrounded by three position
13N 7c sensitive |DE-E Si detector telescopes, which triggered the DAQ;
13N 8c the ISOLDE Si ball was not included in the trigger due to a high
13N 9c sensitivity to |b particles.
13N c The delayed-proton energy spectrum was analyzed using Breit-Wigner
13N 2c shapes, the analysis deduced relative I{p} and I{-|b} values, which
13N 3c were normalized to I{-p}(3.51)=I|b(3.51)=9.8% {I20} from (1990As01).
13N c The (2005Kn02) data set has the highest statistical relevance
13N 2c and covers a broader energy range than other measurements
13N 3c (1965Mc09, 1970Es03, 1990As01). Furthermore, the discussion on the
13N 4c line-shape analysis suggests the results of (2005Kn02) should be
13N 5c adopted. Noteworthy differences between other measurements are
13N 6c for decay from {+13}N{+*}(8.918); (2005Kn02) observe a stronger p{-1}
13N 7c branch than earlier measurements. Second, no evidence is seen for
13N 8c decay of {+13}N{+*}(10.360); the difference is attributed to the
13N 9c more sophisticated line-shape analysis in (2005Kn02).
13N c A subtle note to understanding the (2005Kn02) manuscript: in Table 2
13N 2c for %I|b for {+13}N{+*}(15.065), the value includes unobserved
13N 3c contributions from |g decay, proton decay and |a decay.
13N c
13N c 2023Bi03,2024Bi01:
13N 2c A 15.1 MeV {+13}O beam from the Texas A&M MARS facility
13N 3c was implanted into the TexAT TPC. The |b-delayed charged-particle
13N 4c emission events producing 3|ap events were analyzed. A total of
13N 5c 149 events (%|b3|ap|?0.078 {I6}) mainly included decay via
13N 6c {+13}N{+*}|)p+[{+12}C{+*}(7.65 MeV)|)|a+{+8}Be{-g.s.}] and
13N 7c {+13}N{+*}|)|a+[{+9}B{+*}|)p+{+8}Be{-g.s.}]; three low-lying {+9}B
13N 8c states appear to be involved.
13N c From the 149 3|ap events, 102 events were fully reconstructed.
13N 2c The remaining 47 events were incomplete, for example,
13N 3c because they involved
13N 4c high energy |a-particles that could not be fully characterized by the
13N 5c active volume of the TexAT TPC, for example, feeding to high-lying
13N 6c states that decay to {+9}B{-g.s.}+|a.
13N 7c In general, the decay energy was deduced using momentum conservation
13N 8c and the excitation energies of related {+8}Be, {+9}B, and {+12}C
13N 9c were obtained from an invariant mass analysis.
13N c The authors found evidence for population of
13N 2c {+13}N* states at 11.3, 11.8, 12.4, 13.1, and 13.7 MeV; only the
13N 3c 11.8 MeV state was previously reported. These
13N 4c states show significant clustering. The evaluator notes that for
13N 4c 1.9|*10{+5} decays, ~17 events
13N 5c should have proceeded through the {+13}N{+*}(15.1 MeV) IAS state and
13N 6c resulted in 3|ap events.
13N c In Table I, (2024Bi01) clarifies the deduced decay modes.
13N 2c Some interpretation of the (2005Kn02) {+13}O |b-p{-0} results
13N 3c are included in the present analysis.
13N 4c A state at 11.3 MeV mainly decays to {+9}B{-g.s.}; the authors suggest
13N 5c this new state may have been overlooked by (2005Kn02) where a
13N 6c narrow peak is visible at E{-p}=8.64 MeV that was attributed to the
13N 7c peak corresponding to p{-2} decay from {+13}N{+*}(15.1 MeV) at
13N 8c E{-p}=8.68 MeV; this new state also has a component to
13N 9c {+12}C(7.65 MeV). Authors suggest the E{-x}=11.8 MeV group corresponds
13N ac to the known J|p=3/2- E{-x}=11.74 state; it is mainly seen in the
13N bc p{-2} channel and the present analysis associates the (2005Kn02)
13N cc E{-p}|?9.78 MeV counts with this state.
13N dc A new state at E{-x}=12.4 MeV is found to decay mainly to {+9}B via
13N ec |a{-0} and |a{-1} with a small component to {+12}C(7.65 MeV).
13N fc Authors suggest a strong {+9}B(1/2+)~#|a configuration.
13N gc A state at E{-x}=13.1 MeV appears to decay mainly via |a{-3} emission;
13N hc in such a case a {+9}B(5/2+)~#|a configuration would be likely;
13N ic however involvement
13N jc of {+9}B(2.78 MeV: 1/2-) cannot be rulled out which would suggest
13N kc J=1/2-. Authors suggest possible evidence of a
13N lc peak at E{-p}=6.20 MeV in (2005Kn02) that could correspond to p{-0}
13N mc decay to this level. This state is associated with a state previously
13N nc reported at 13.26 MeV.
13N nc Lastly, a state at E{-x}=13.7 is reported to decay via p{-2}, and
13N oc |a{0,1,3}; J|p=3/2{+-} or 5/2{+-} are permitted, but L=3 would
13N pc be required for p{-2} decay so 3/2{+-} is preferred.
13N c
13N c {ITheory:}
13N c 1993Ch06: Shell model analysis of |b-decay
13N c 2003Sm02: Analysis of B(GT) rates.
13N c 2012Sa50: Global analysis of isospin-breaking corrections in
13N 2c superallowed decays.
13N c
13N c Studies relevant to {+13}O properties include:
13N 2c (1996Ma37, 1996Ma38, 1999Ma46).
13N c
13N cL E,J,T$From Adopted Levels, except where noted.
13N cL T$LABEL=|G
13N cL T$From fit to |b-p spectrum from {+13}O |b{++} decay (2005Kn02)
13N cL E(A),J(A)$Four new states are suggested at
13N 2cL {+13}N{+*}(11.3, 12.4, 13.1 and 13.7 MeV) (2023Bi03, 2024Bi01).
13N 3cL The authors indicate an independent
13N 4cL branching-ratio measurement from the number of implants is not
13N 5cL reliable due to sizeable noise in some detectors; using their
13N 6cL reported count rates the evaluator could suggest %I|b on the order of
13N 7cL 0.01-0.02% for each state. No intensity is assigned in the
13N 8cL present evaluation. Assuming these are allowed decays, J|p
13N 9cL arguments are given based on the various decay modes.
13N cE IB$Normalized to absolute I{-p}(3.51)=I|b(3.51)=9.8% {I20}
13N 2cE from (1990As01).
13N N 1 1 1
13N DE LOGFT,CK,CL,CM,CN$FROM BetaShape v2.4 (Jun-2024) 2019MO35.
13N DE EAV,LOGFT$FROM BetaShape v2.4 (Jun-2024) 2023MO21.
13O P 0 3/2- 8.58 MS 5 17770 10
13N L 0 1/2- 9.9584 M 36
13N E 88.7 201.287E-4374.088 10 88.7 20
13N S E EAV=8083.0 49$CK=1.347E-6 24$CL=1.038E-7 20
13N cE IB$From 100%-|S(decay to excited states).
13N L 3500.4 8 3/2- 55.0 KEV 6
13N cL T$See 63 keV {I4} in (2005Kn02)
13N cL $%I|b-p0=9.8 {I20}; this implies
13N 2cL %p{-0}=100
13N E 9.8 202.7E-5 54.55 9 9.8 20
13N S E EAV=6353.1 49$CK=2.524E-6 47$CL=1.946E-7 38
13N L 7377 6 5/2- 66 KEV 9
13N cL T$See 104 keV {I20} in (2005Kn02)
13N cL $%I|b-p0=0.009 {I4} and %I|b-p1=0.235 {I29}; this implies
13N 2cL %p{-0}=3.6 and %p{-1}=96.4
13N E 0.24 31.71E-6 225.44 5 0.24 3
13N S E EAV=4440 6$CK=6.62E-6 13$CL=5.11E-7 11
13N cE $The deduced I|b differs slightly from (2005Kn02) I|b=0.24 {I2}
13N L 8918 11 1/2- 278 KEV 16
13N cL T$From (2005Kn02)
13N cL $%I|b-p0=0.519 {I40} and %I|b-p1=0.441 {I29}; this implies
13N 2cL %p{-0}=54.1 and %p{-1}=45.9
13N E 0.96 51.14E-5 64.469 23 0.96 5
13N S E EAV=3681 7$CK=1.105E-5 24$CL=8.52E-7 19
13N cE $The deduced I|b differs slightly from (2005Kn02) I|b=0.96 {I4}.
13N L 9476 8 3/2- 30 KEV
13N cL T$See 143 keV {I18} in (2005Kn02)
13N cL $%I|b-p0=0.137 {I12} and %I|b-p1=0.104 {I11}; this implies
13N 2cL %p{-0}=56.9 and %p{-1}=43.1
13N E 0.24 23.53E-6 304.919 36 0.24 2
13N S E EAV=3407 6$CK=1.366E-5 29$CL=1.053E-6 23
13N L 11.3E3 1 [3/2-] 200 KEV LT
13N 2 L FLAG=A
13N cL T$Deduced in (2024Bi01); if this state is observed in (2005Kn02)
13N 2cL (2024Bi01) suggest |G<40 keV.
13N cL $Suggested to decay via
13N 2cL |a{-0}+{+9}B{-g.s.},
13N 2cL p+{+12}C{-g.s.} and
13N 2cL p+{+12}C(7654.7 MeV).
13N L 11700 30 5/2- 115 KEV 30
13N cL WIDTH$See 315 keV {I112} (2005Kn02).
13N cL J$In (2024Bi01), decay to p+{+12}C(7654.7 MeV) is reported
13N 2cL for a state in this energy region; they suggest the J|p=3/2-
13N 3cL state near E{-x}=11.8 MeV was involved.
13N cL $I|b-p0=0.015 {I4} and %p{-1}|<0.002; this implies
13N 2cL %p{-0}=100. A small branch via p{-2} decay is reported in (2024Bi01).
13N E 0.015 46.4E-7 175.38 12 0.015 4
13N S E EAV=2319 16$CK=3.93E-5 14$CL=3.03E-6 11
13N cE $The deduced I|b differs slightly from (2005Kn02) I|b=0.015 {I8}.
13N L 12.4E3 1 [3/2-]
13N 2 L FLAG=A
13N cL $Suggested to decay via
13N 2cL |a{-0}+{+9}B{-g.s.},
13N 2cL |a{-1}+{+9}B(1.8 MeV) and
13N 2cL p+{+12}C(7.6547 MeV).
13N L 12937 24 400 KEV GT
13N cL E$See 13.26 MeV {I10} deduced from E{-p} in (2005Kn02)
13N cL WIDTH$See 521 keV {I210} (2005Kn02).
13N cL J$See (-) in (2005Kn02).
13N cL $%I|b-p0=0.011 {I3}; this implies %p{-0}=100
13N E 0.011 31.06E-6 294.96 12 0.011 3
13N S E EAV=1718 13$CK=8.95E-5 33$CL=6.90E-6 26
13N cE $The I{-p_rel}(p{-0})=0.11 {I9} and I{-p_rel}(p{-1})|<0.09
13N 2cE given in (2005Kn02) are incompatible with %I|b=0.011 {I3} given
13N 3cE in their table II; after considering Fig. 2, the evaluator takes
13N 4cE I{-p_rel}(p{-0})=0.11 {I3} rather than I{-p_rel}(p{-0})=0.11 {I9},
13N 5cE and uncertainty from p{-1} is neglected.
13N L 13.1E3 1 [1/2-,5/2-]
13N 2 L FLAG=A
13N cL J$1/2{+-} for |a{-4} decay through {+9}B(2.78:1/2{+-}) is preferred.
13N cL $Suggested to decay via
13N 2cL |a{-1}+{+9}B(1.8 MeV),
13N 2cL |a{-0}+{+9}B(2.75 MeV) or |a{-0}+{+9}B(2.78 MeV) and
13N 2cL p+{+12}C{-g.s.}.
13N L 13.7E3 1 [3/2-]
13N 2 L FLAG=A
13N cL $Suggested to decay via
13N 2cL |a{-0}+{+9}B{-g.s.},
13N 2cL |a{-1}+{+9}B(1.8 MeV),
13N 2cL |a{-0}+{+9}B(2.75 MeV) and
13N 2cL p+{+12}C(7654.7 MeV).
13N L 15064.56 40 3/2- 0.932 KEV 28
13N cL $%I|b-p0=0.0048 {I7}, %I|b-p1=0.0029 {I5} and
13N 2cL %I|b-p2=0.0011 {I2}; when |g and |a decay are
13N 3cL considered, this implies %|g=4.9%, %|a=53.4,
13N 4cL %p{-0}=22.8, %p{-1}=14.0 and %p{-2}=4.9
13N E 0.019 42.07E-5 443.16 9 0.019 4
13N S E EAV=710.9 46$CK=0.001011 35$CL=7.79E-5 27
13N L 15.30E3 20 (3/2+) 0.35 MEV 14
13N cL E$deduced from E{-p}
13N cL J$If populated in this (2005Kn02), the transition is allowed and
13N 2cL |p=-; however the evaluator expresses reservations upon consideration
13N 3cL of the background near where perhaps three or four counts
13N 4cL attributed to this broad state are identified. The evaluator
13N 6cL discounts the merit of any J|p constraints based on the suggestion this
13N 7cL is an allowed transition.
13N cL $%I|b-p0=0.004 {I3} and %p{-1}|<0.0004; this implies
13N 2cL %p{-0}=100.
13N E 0.004 37E-6 73.56 45 0.004 3
13N S E EAV=6.0E2 9$CK=0.0016 9$CL=1.2E-4 7
13N cE $The deduced I|b differs slightly from (2005Kn02) I|b=0.004 {I2}.