92RU 92RH EC DECAY (4.66 S) 2004DE40,1999ZH04 12NDS 201210
92RU H TYP=FUL$AUT=CORAL M. BAGLIN$CIT=NDS 113, 2187 (2012)$CUT=15-Sep-2012$
92RU C 1999ZH04: source from 150 MEV 40CA bombardment of 90% enriched 58NI
92RU2C target, 1.125 S wide chopped beam; four HPGe detectors; measured EG,
92RU3C IG, GG coin (80 NS coincidence time resolution), G-G+- coin.
92RU C 2002KU21: SOURCE FROM 58NI(36AR{+10+},PN), E=130 MEV MID-TARGET;
92RU2C MEASURED EG (5 TRANSITIONS), B-G COIN, ^T{-1/2}(92RH).
92RU C 2004DE40: 92RH source produced using the 58NI(36AR{+10+},pn)
92RU2C reaction; E=135 MEV BEAM DEGRADED TO 120 MEV AT TARGET CENTER BY Ta
92RU3C FOILS TO TAKE ADVANTAGE OF THE 368 |mb reaction cross-section maximum
92RU4C (as calculated by ^HIVAP code); recoils from target were stopped
92RU5C and neutralized IN 500 mbar of purified Ar gas inside a cell, THEN
92RU6C selectively ionized using two dye lasers tuned to the
92RU7C resonant atomic transitions of RH TO STRONGLY ENHANCE ITS
92RU8C ionization and extraction; laser-ionized nuclei guided towards ^LISOL
92RU9C mass separator by a sextupole ion guide; two HPGe detectors arranged in
92RUAC compact configuration around |b-sensitive plastic DE-E detectors
92RUBC enclosing the tape station; MEASURED SINGLES AND |b-GATED G
92RUCC SPECTRA, EG (E<4 MEV), IG, GG, |b|g coin, ^T{-1/2}(PARENT).
92RU C The decay scheme is that of 2004DE40. Since feeding is OBSERVED to
92RU2C the 2675 (6+) state (probably an allowed branch) and also to the 2838
92RU3C (8+) level, 2004DE40 suggest JPI (|>6+) FOR THE 4.66 S 92RH PARENT.
92RU4C WHETHER THIS IS THE 92RH GS IS UNCLEAR, BUT SHELL-MODEL CALCULATIONS
92RU5C (2004DE40) PREDICT E LE 600 KEV FOR THE FIRST 2+,4+,6+,8+ AND 9+
92RU6C LEVELS; FOR SUCH ENERGIES, EC DECAY TO BOTH THE (6+) 2675 AND THE 3015
92RU7C LEVELS APPEARS TO be ALLOWED. However, it must be remembered that this
92RU8C decay scheme may be seriously incomplete (Q+ AP 11300, EG>4 MEV
92RU9C UNDETECTED).
92RU CE TI EC+B+ feeding to ground and excited states in 92RU was
92RU2CE deduced by 2004DE40 from I(G+-) AFTER CORRECTION FOR CONTRIBUTIONS
92RU3CE FROM OTHER A=92 NUCLIDES; this indicated branches to the GS and
92RU4CE first 2+ state of at least 25% and 5%, respectively, inconsistent with
92RU5CE the meaningful branches observed to (6+) AND (8+) states.
92RU6CE Additionally, two half-life components were observed in the time
92RU7CE behaviour of the 866G. Consequently, the authors concluded that their
92RU8CE 92RH source contained both high- and low-spin isomers and I(866G)
92RU9CE WAS APPORTIONED BETWEEN THEM BASED ON THE TWO-COMPONENT FIT TO ITS TIME
92RUACE BEHAVIOR. All 511G events that could not be associated
92RUBCE with G events visible in the 92RH decay spectra were assigned by
92RUCCE 2004DE40 to the GS branch FROM THE LOW-SPIN ISOMER. GIVEN THE LARGE Q+
92RUDCE AND AN INABILITY TO OBSERVE EG>4 MEV, A NUMBER OF WEAK DECAY BRANCHES
92RUECE MAY CONSEQUENTLY HAVE BEEN OVERLOOKED AND THE BRANCHINGS DEDUCED FOR
92RUFCE THE REPORTED LEVELS (ESPECIALLY THE GS BRANCH) WILL be CORRESPONDINGLY
92RUGCE UNCERTAIN AND ARE SHOWN HERE FOR COMPLETENESS ALONE.
92RU CE LOGFT VALUES WERE CALCULATED ASSUMING DECAY IS FROM 92RH GS; SEE
92RU2CE ALSO THE GENERAL COMMENT ON TI. 2004DE40 CONSIDER THEM TO be
92RU3CE LOWER LIMITS, AT BEST.
92RU CG E,RI FROM 2004DE40.
92RU CG M FROM Adopted Gammas.
92RU CL E FROM EG.
92RU CL J FROM Adopted Levels.
92RH P 0+X (|>6+) 4.66 S 25 11302 5
92RH CP QP FROM 2011AUZZ; 11050 500 (2003Au03, from systematics)
92RH CP E whether this level is the ground state of 92RH or the isomer
92RH2CP is not apparent according to 2004De40. Hence, the absolute energy of
92RH3CP the state is not determined.
92RH CP T FROM time behaviour of the 163G, 340G, 818G, and 919G,
92RH2CP measured using a macrocycle of a beam-on followed by a beam-off period,
92RH3CP with on/off times tailored to suit the expected half-life of the
92RH4CP isotope under study.
92RU N 1.0 1.0 1.0 1.0
92RU PN 3
92RU L 0.0 0+
92RU L 865.7 1 (2+)
92RU G 865.7 1 103 15 (E2)
92RU L 1856.8 4 (4+)
92RU E 14 6 0.08 4 5.9 14 6
92RUS E EAV=3978.6 25$CK=0.005076 9$CL=0.0006180 1$CM+=0.0001452 3
92RU CE LOGFT value is unrealistically low FOR A DJ=2, DPI=NO EC
92RU2CE BRANCH.
92RU G 991.1 3 100 (E2)
92RU L 2674.6 4 (6+)
92RU E 25 5 0.20 4 5.5 25 5
92RUS E EAV=3577.3 25$CK=0.006837 14$CL=0.0008327 1$CM+=0.0001956 4
92RU G 817.8 1 76 9 (E2)
92RU L 2775.9 4
92RU E 9.9 20 0.082 16 5.8 10 2
92RUS E EAV=3527.7 25$CK=0.007109 14$CL=0.0008659 1$CM+=0.0002034 4
92RU G 919.1 1 10 2
92RU L 2837.7 4 (8+)
92RU E 8.2 24 0.070 20 5.9 8.3 24
92RUS E EAV=3497.5 25$CK=0.007282 15$CL=0.0008870 1$CM+=0.0002084 5
92RU CE LOGFT if JPI(parent)=6+, this value is unrealistically
92RU2CE low compared with that expected for a DJ=2, DPI=NO EC BRANCH.
92RU G 163.1 2 6.8 20 E2 0.225
92RU L 3014.5 4 (GE5)
92RU E 43 4 0.39 4 5.1 43 4
92RUS E EAV=3411.0 25$CK=0.007810 16$CL=0.0009514 2$CM+=0.0002235 5
92RU G 339.9 2 43 4