98MO 98NB B- DECAY (2.86 S) 1976HE10,1987MA58 20NDS 202004
98MO H TYP=FUL$AUT=Jun Chen, Balraj Singh$CIT=NDS 164, 1 (2020)$
98MO2 H CUT=15-Feb-2020$
98MO c 1976He10: Sources of {+98}Nb in g.s. were from the |b{+-} decay of
98MO2c {+98}Zr produced by fission of {+235}U with thermal neutrons at
98MO3c Institut fur Kernchemie. |g rays were detected with Ge(Li) and NaI(Tl)
98MO4c detectors and |b particles were detected with a |b-ray proportional
98MO5c counter. Measured E|g, I|g, |g|g-coin, E|b, |b|g-coin, E(ce), I(ce),
98MO6c T{-1/2}({+98}Nb g.s.). Deduced levels, branching ratios. Same data also
98MO7c appear in a thesis by one of the authors(Herzog)
98MO c 1987Ma58: measured absolute intensities of 734, 787 and 1024
98MO2c transitions using a mass-separated sample for A=98 nuclei from
98MO3c {+235}U(n,F) reaction. No contamination from A=97 and A=99 nuclides
98MO4c was observed. The low temperature for the ion source further isolated
98MO5c {+98}Rb only (with <5% direct {+98}Sr). The A=97 nuclides in the sample
98MO6c were contributed only by delayed neutron decay (13.4%) of {+98}Rb.
98MO c 1983VaZQ: {+98}Nb and {+98}Y sources formed in {+232}Th,{+238}U(|a,F),
98MO2c E=40 MeV. Measured K-shell and L-shell conversion lines for 735, E0
98MO3c transition in {+98}Mo and 853, E0 transition in {+98}Zr.
98MO c Other measurements:
98MO c 1978St02: |b, |b|g
98MO c 1976KhZT: ce for 735 transition
98MO c 1971Fo21: ce for 735, E0 transition
98MO c 1969Hu07: |g, |g|g, |b, |b|g. 5 |g's reported. See also 1967Hu08,
98MO2c 1967Hu07, 1967Hu11 for ce, ce(t) and T{-1/2}({+98}Nb g.s.)
98MO c 1960Or02: T{-1/2}({+98}Nb g.s.)
98MO cB IB$From |g+ce intensity balance at each level.
98MO cG E,RI$From 1976He10, unless otherwise noted. Relative intensities are
98MO2cG from {+98}Zr-{+98}Nb equilibrium mixture. The absolute intensities
98MO3cG of 734 and 787 transitions have been measured by 1987Ma58, 1976He10
98MO4cG and 1967Hu07 using different methods. In 1987Ma58, data for 735 and
98MO5cG 787 transitions were normalized to 854 (an E0 transition in {+98}Zr
98MO6cG from {+98}Y decay) and 743 transition (in {+97}Nb from {+97}Zr and
98MO7cG {+97}Nb IT decay with I|g(absolute)=94.75% {I30}), respectively.
98MO8cG 1976He10 normalized intensity of 787|g to 743|g (in {+97}Nb from
98MO9cG {+97}Zr and {+97}Nb IT decay). The absolute intensity of 735
98MOAcG transition was determined from Ice(735) and integrated |b spectrum
98MOBcG for {+98}Nb. 1969Hu07 measured absolute intensities of both
98MOCcG transitions with |b and |g detectors of calibrated efficiencies.
98MODcG The results from 1987Ma58 are considered more reliable but differ by
98MOEcG a factor of |?4 from those by 1976He10 and 1969Hu07. The ratio
98MOFcG Ice(854,E0 in {+98}Zr from {+98}Y decay)/Ice(735, E0 in {+98}Mo
98MOGcG from {+98}Nb decay) were also measured by 1983VaZQ in {+232}Th(|a,F)
98MOHcG and {+238}U(|a,F) reactions, and by 1971Fo21 from fission of
98MOIcG {+235}U and {+239}Pu
98MO cG M,MR$From Adopted Gammas
98MO cL E$From least-squares fit to E|g data
98MO cL J$From Adopted Levels
98NB P 0 1+ 2.86 S 6 4591 5
98NB cP J,T$From {+98}Nb Adopted Levels
98NB cP QP$From 2017Wa10
98MO N 0.13 1 0.13 1 1 1
98MO cN NR$from I|g(absolute)(787|g)=13 {I1} (1987Ma58). Other measurements
98MO2cN give I|g(absolute)=3.2 {I5} (1976He10), 4.0 {I20} (1969Hu07).
98MO3cN See general comment on I|g for details of different measurements
98MO PN 3
98MO L 0.0 0+
98MO B 57 6 4.72 5
98MOS B EAV=2019.1 24
98MO cB E$4580 {I120} (1978St02), 4800 {I200} (1976He10)
98MO L 734.61 10 0+ 22 NS 1
98MO cL T$735ce(t) (1967Hu07)
98MO B 20 4 4.8 1
98MOS B EAV=1667.9 24
98MO G 734.6 1 E0 200 35 C
98MOS G K/T=0.843
98MO cG E$from level energy difference
98MO cG M$no corresponding |g ray seen in ce data
98MO cG TI$from I(|g+ce)(absolute)(735)=26 {I4} determined from
98MO2cG ce(854 E0 in {+98}Zr)/ce(735 E0 in {+98}Mo)=0.56 {I6} (1983VaZJ) and
98MO3cG absolute intensity I(|g+ce)=14.4 {I14} of 854 transition in {+98}Zr
98MO4cG (see {+98}Y |b{+-} decay: 0.548 s). 1987Ma58 deduced a value of 26 {I6}
98MO5cG using I(|g+ce)(854)=15 {I3}. Other %I(|g+ce) measurements: 5.5 {I11}
98MO6cG (1976He10), 6 {I2} (1967Hu07)
98MO cG $ce(854)/ce(735)=0.40 in 1971Fo21 gives absolute I(|g+ce)|?30 (as
98MO2cG deduced by 1976He10). Others: ce(854)/ce(735)=0.36 {I6}, 0.47 {I5} in
98MO3cG two different reactions (1983VaZQ) is consistent with that from
98MO4cG 1987Ma58 and 1971Fo21. See general comment on I|g for details of these
98MO5cG measurements
98MO L 787.29 21 2+
98MO B 3.5 7 5.6 1
98MOS B EAV=1642.7 24
98MO G 787.4 3 100 E2 C
98MO cG RI$absolute I|g=13 {I1} (1987Ma58). Others: 3.2 {I5} (1976He10),
98MO2cG 4.0 {I20} (1969Hu07). See also general comment on I|g
98MO L 1432.37 23 2+
98MO B 6.6 9 5.0 1 C
98MOS B EAV=1336.1 24
98MO cB E$3180 {I200} from |b(1432|g) coin (1978St02)
98MO G 645.1 3 26 3 E2+M1 +1.69 16 0.0047523 C
98MO G 697.4 1.3 (E2) S
98MO G 1432.4 3 26 4 E2 C
98MO L 1758.91 22 2+
98MO B 10.3 11 4.56 5 C
98MOS B EAV=1181.9 24
98MO cB E$2760 {I200} (1978St02) from |b(1024|g) coin
98MO G 326.7 6 2.4 4 (M1(+E2)) -0.17 22 0.0111 8 C
98MOS G KC=0.0097 7$LC=0.00112 10$MC=0.000201 17
98MOS G NC=3.05E-5 25$OC=1.71E-6 10
98MO G 971.7 3 25 3 M1+E2 -0.97 14 C
98MO G 1024.3 3 47 5 E2 C
98MO cG RI$from I|g(1024|g)/I|g(787|g)=6.1 {I6}/13 {I1} (1987Ma58).
98MO2cG Other: I|g=50 {I6} (1976He10)
98MO G 1758.4 6 5.0 10 [E2]
98MO L 2037.5 7 0+
98MO B 0.88 17 5.4 1
98MOS B EAV=1051.2 24
98MO G 1250.2 6 6.8 12(E2) C
98MO L 2207.0 4 2+
98MO B 1.7 3 5.0 1
98MOS B EAV=972.1 24
98MO G 1419.7 3 12.8 20M1+E2 -0.33 11 C
98MO L 2608.3 7 0+
98MO B 0.33 14 5.4 2
98MOS B EAV=786.7 24
98MO G 1821.0 6 2.5 10(E2) C
98MO cG E,RI$from |g|g only (1976He10)