93RU 93RH EC DECAY 2004DE40 11NDS 201105
93RU H TYP=FUL$AUT=CORAL M. BAGLIN$CIT=NDS 112, 1163 (2011)$CUT=15-Dec-2010$
93RU C 2004DE40: 93RH source from 58NI(40AR{+11+},P4N), E=171 MEV AT TARGET
93RU2C FACE (AFTER DEGRADATION OF 250 MEV BEAM USING Ta foils); 99.93% 58NI
93RU3C TARGET; RECOILS WERE stopped and neutralized in 500 mbar of purified Ar
93RU4C GAS BEFORE BEING ionized selectively (according to Z) using two dye
93RU5C lasers tuned to the resonant atomic transitions of Rh TO ENHANCE
93RU6C ionization, and thus extraction; laser-ionized nuclei guided
93RU7C towards the ^LISOL mass separator by a sextupole ion guide, THEN
93RU8C IMPLANTED ONTO MOVABLE TAPE; |b-SENSITIVE PLASTIC DE DETECTORS; 2 HPGe
93RUFC DETECTORS; measured EG, IG, GG COIN, |b|g coin, IB, isotope ^T{-1/2}
93RU C No evidence (NEITHER THE ^IT NOR ANY |b-delayed |g EVENTS) was found
93RU2C by 2004De40 for the presence of the known (1976DE37) ^T{-1/2}=10.8 S,
93RU3C 1/2- isomer IN 93RU.
93RU CE TI ABSOLUTE INTENSITY DETERMINED BY 2004DE40 FROM I(G+-) AFTER
93RU2CE CORRECTION FOR CONTRIBUTION FROM DECAY OF THE 93RU ISOBAR. All I(G+-)
93RU3CE not associated with G events visible in the |g-ray spectra were
93RU4CE attributed to the GS branch. Consequently, this branch may be
93RU5CE overestimated because it will incorporate branching to states
93RU6CE whose deexciting G-RAYS are too weak or too energetic (>4 MEV) to
93RU7CE have been detected in this experiment. Also, the existence of such
93RU8CE transitions may result in an under-estimation of branching to
93RU9CE some excited states.
93RU CE LOGFT Values should probably be regarded as lower limits because
93RU2CE the large Q value
93RU3CE suggests the possibility of significant unobserved feeding to highly
93RU4CE excited states which subsequently decay to low-lying levels. Weakly
93RU5CE populated states and branching to states producing |g-rays outside the
93RU6CE 4 MEV |g-energy range may be wrongly attributed to ground-state decay.
93RU7CE A further consequence may be that apparently-forbidden |b decays may
93RU8CE result from G transitions from higher-lying levels fed by allowed EC
93RU9CE transitions.
93RU CG M FROM Adopted Gammas.
93RU CL 2004DE40 conclude that many of the low-lying 93RU states
93RU2CL populated in 93RH EC decay can be understood as belonging to
93RU2CL |p(p{-1/2},g{-9/2}){+-6} |ng{-9/2}{+-1} configurations.
93RU CL E From least-squares fit to EG.
93RU CL J FROM Adopted Levels.
93RH P 0.0 (9/2+) 11.9 S 7 8203.0 6
93RH CP QP FROM 2009AUZZ; Q=8090 410 FROM SYSTEMATICS (2003Au03).
93RH CP T Calculated from a fit to the sum of the individual
93RH2CP time-to-digital spectra gated on each of the 7 transitions
93RH3CP attributed to 93RH decay. Half-life was accurately measured using
93RH4CP a macrocycle of a beam-on period followed by a beam-off period.
93RH5CP The on/off times were altered to suit the expected ^T{-1/2} of the
93RH6CP isotope of interest. The tdc was started at the beginning of each
93RH7CP macrocycle, recording the time of each triggered event
93RH8CP relative to the start.
93RU N 0.058 0.058 1.0 1.0
93RU CN NR FROM COMPARISON OF |S(TI TO GS) WITH AUTHORS' SUMMED
93RU2CN %EC+%B+ TO EXCITED STATES (=20.3 20).
93RU PN 3
93RU L 0.0 (9/2)+
93RU E 79 16 0.74 15 5.26 9 80 16
93RUS E EAV=3370.72$CK=0.008075 2$CL=0.0009838 3$CM+=0.0002311
93RU L 1359.42 10
93RU DL TI IMBALANCE=80 7.
93RU E 4.5 9 0.079 15 6.07 9 4.6 9
93RUS E EAV=2708.46 30$CK=0.014841 5$CL=0.0018097 6$CM+=0.0004252 2
93RU G 1359.4 1 100
93RU L 1393.31 20 (13/2)+
93RU DL TI IMBALANCE=72 14
93RU E 4.1 8 0.073 14 6.10 9 4.2 8
93RUS E EAV=2692.02 31$CK=0.015093 5$CL=0.0018406 6$CM+=0.0004325 2
93RU CE LOGFT value is unrealistically low compared to that expected
93RU2CE for a DJ=2, DPI=NO EC transition.
93RU G 1393.3 2 72 14 E2
93RUS G CC=0.000483 7$KC=0.000382 6$LC=4.33E-5 6$MC=7.93E-6 11$NC+=4.98E-5 7
93RUS G NC=1.283E-6 18$OC=6.81E-8 10$IPC=4.84E-5 7
93RU L 1629.92 10
93RU DL TI IMBALANCE=56 21.
93RU E 3.2 8 0.065 16 6.12 11 3.3 8
93RUS E EAV=2577.34 30$CK=0.017026 6$CL=0.0020767 7$CM+=0.0004880 2
93RU G 1629.9 1 98 19
93RU L 1842.1 3
93RU DL TI IMBALANCE=51 15.
93RU E 2.9 9 0.066 20 6.09 14 3.0 9
93RUS E EAV=2474.67 33$CK=0.019051 7$CL=0.0023241 9$CM+=0.0005461 2
93RU G 482.6 3 20 7
93RU G 1842.4 6 31 13
93RU L 2273.53 14
93RU DL TI IMBALANCE=90 16.
93RU CL J 2004De40 conclude that this level is a likely candidate for
93RU2CL the first excited 9/2+ state predicted at ~2 MeV by shell-model
93RU3CL calculations.
93RU E 5.1 10 0.15 3 5.68 9 5.2 10
93RUS E EAV=2266.43 30$CK=0.024271 9$CL=0.002962 1$CM+=0.0006961 3
93RU G 643.6 1 42 8
93RU G 2273.8 9 48 13