170IR 174AU A DECAY (162.9 MS) 2004GOZZ,1996PA01 18NDS 201811
170IR H TYP=FUL$AUT=C.M. Baglin{+1}, E.A. McCutchan{+2}, S. Basunia{+1$
170IR2 H CIT=NDS 153, 1 (2018)$CUT=1-Oct-2018$
170IR C 2004GOZZ: 174AU SOURCE FROM 92MO(84SR,PN), E=390, 395 MEV; 98.27% 92MO
170IR2C target; FRAGMENT MASS ANALYZER AND DOUBLE-SIDED SI STRIP
170IR3C DETECTOR (FOR RECOILS AND DECAY |a PARTICLES) SURROUNDED BY 4 Ge
170IR4C DETECTORS AND A LOW-ENERGY PHOTON SPECTROMETER; RECOIL DECAY TAGGING
170IR5C TECHNIQUE; MEASURED EA, IA, EG, IG, I(XK), RECOIL-|a-G COIN, |a(t),
170IR6C PARENT-DAUGHTER |a CORRELATIONS. ^Supersedes 2001KOZY.
170IR C 2002RO17: 174AU PRODUCED BY |a DECAY OF 178TL; SI STRIP DETECTOR;
170IR2C MEASURED EA, PARENT-DAUGHTER |a CORRELATIONS, ^T{-1/2} FOR
170IR3C DAUGHTER.
170IR C 1996PA01: 174AU produced in 309 MEV 70GE bombardment of 106CD;
170IR2C RECOIL MASS SEPARATOR WITH DOUBLE-SIDED SI STRIP DETECTOR AT FOCAL
170IR3C PLANE (FWHM LE 20 KEV); measured EA, IA, |a(t), parent-daughter |a
170IR4C correlations. OTHER: 1984SCZQ,
170IR C THE ADOPTED DECAY SCHEME IS BASED ON THE DATA OF 2004GOZZ.
170IR C
170IR C THE INTERPRETATION OF DATA FROM THIS DECAY IS COMPLICATED BY THE
170IR2C SIMILARITY OF ^T{-1/2} FOR THE TWO 174AU ISOMERS, THE SIMILARITY OF
170IR2C ^T{-1/2} AND ONE EA TO THAT FOR 175AU AND THE POSSIBILITY OF TWO |a+ce
170IR3C SUM PEAKS FOR ONE 174AU ISOMER AT ALMOST THE SAME ENERGY AS AN |a GROUP
170IR4C FROM THE OTHER 174AU ISOMER. |a CORRELATION INFORMATION IS OF VITAL
170IR5C IMPORTANCE. THE AVAILABLE DATA FOR BOTH 174AU ISOMERS ARE SUMMARIZED
170IR6C IN THE TABLE BELOW. IT REMAINS UNCLEAR WHY THE 6471A AND 6433A FROM
170IR7C 2004GOZZ ARE NOT REPORTED BY EITHER 2002RO17 OR 1996PA01 EVEN THOUGH
170IR8C THE LATTER STUDIES REPORT A 6544A CORRELATED WITH THE 170IR 6083A.
170IRAC ADDITIONAL MEASUREMENTS APPEAR TO be NECESSARY.
170IRBC
170IR T {U Summary of 174AU |a DECAY data (for {b both} isomers):}
170IR2T
170IR2T EA IA Half-life Reference(s) Correlation(s)
170IR2T
170IR2T 6433 5 29 2 162 MS 4 ^H 2004GOZZ 170IR(6088A),191.2G
170IR2T
170IR2T 6471 5 32 3 171 MS 7 ^H 2004GOZZ 170IR(6088A),153.2G
170IR2T
170IR2T 6544 10 - 171 MS 29 ^H 1996PA01 170IR(6083A)
170IR2T 6544 - ^H 2002RO17 170IR(6082A)
170IR2T 6548# 10 35 3 160 MS 5 ^H 2004GOZZ 170IR(6088A)
170IR2T 6530 20 - 120 MS 20 ? 1983SC24
170IR2T 6546 10 - 123 MS 20 ? 1984SCZQ
170IR2T 6538 - 139 MS 3 ^L 2002RO17 178TL(6704A)&
170IR2T 170IR(5817A)
170IR2T 6547 5 - - ^L 2004GOZZ 170IR(5815A)
170IR2T
170IR2T 6626 10 - 119 MS 26 ? 1984SCZQ -
170IR2T 6637 13 - - ^H 1996PA01 -
170IR2T 6618 15 <4 163 MS 2 ^H 2004GOZZ 170IR(6088A)
170IR2T
170IR2T # IDENTIFIED by 2004GOZZ as sum peak from 6471A(174AU)-153ce(K)(170IR)
170IR2T coincidences.
170IR2T L - ASSOCIATED WITH LOW-SPIN 174AU DECAY.
170IR2T H - ASSOCIATED WITH HIGH-SPIN 174AU DECAY.
170IR2T
170IR CA IA RELATIVE INTENSITIES FROM 2004GOZZ HAVE BEEN RENORMALIZED
170IR2CA SO SUMOF IA=100%; THE RELATIVE IA(6618)<4 FROM 2004GOZZ HAS BEEN
170IR3CA INTERPRETED AS IA=2 2.
170IR4CA 1996PA01 note that their 6544A is stronger than their 6637A; HOWEVER,
170IR5CA IT IS UNCLEAR WHETHER THOSE TWO LINES ARISE ENTIRELY FROM THE
170IR6CA SAME PARENT.
170IR CA HF R0=1.5530 24 (unweighted average of R0(170OS)=1.556 6 and
170IR2CA R0(170PT)=1.548 12 from 2002BA93, R0(168OS)=1.558 8 AND
170IR3CA R0(172PT)=1.55 3 FROM 1998AK04). HF can be given only as a lower
170IR4CA limit because %A(174AU) is unknown.
170IR CA E(Z) THIS |a LINE HAS BEEN ATTRIBUTED TO 174AU ONLY BY 2004GOZZ
170IR2CA AND 2001KOZY. ^However, 1984SCZQ ATTRIBUTE TO 175AU BOTH AN EA=6435 10
170IR3CA (^T{-1/2}=220 MS 20) AND AN EA=6470, AND THESE ARE IN COINCIDENCE
170IR4CA WITH 190.0G AND 152.7G, RESPECTIVELY; IT SEEMS POSSIBLE THAT THESE
170IR5CA MAY ARISE, INSTEAD, FROM 174AU DECAY.
170IR CG E From 2004GOZZ.
170IR CL E Based on measured EG, except as noted. EA ENERGY DIFFERENCES
170IR2CL from 2004GOZZ lead to E(level) values that are consistent with
170IR3CL these.
170IR CL J FROM Adopted Levels.
174AU P 0.0+X (9+) 162.9 MS 16 6699 7
174AU CP J$is UNMEASURED. ^However, FOR SMALL DEFORMATION, THE
174AU2CP LOWEST-ENERGY ORBITALS AVAILABLE TO THE 79th PROTON ARE PROBABLY
174AU3CP 1/2[400] (s{-1/2}), 1/2[411] AND 3/2[402] (d{-3/2}), AND 11/2[505]
174AU4CP (h{-11/2}); THOSE AVAILABLE TO THE 95th NEUTRON ARE 5/2[512]
174AU5CP (h{-9/2}) AND 7/2[514] (f{-7/2}). ^The CLOSE PROXIMITY OF 1/2+ AND
174AU6CP 11/2- ORBITALS RESULTS IN 1/2+ AND 11/2- ISOMER PAIRS IN THE
174AU7CP NEIGHBORING ODD-^A AU ISOTOPES, AND THE ISOTONES 173PT, 171OS, 167W
174AU8CP HAVE (5/2-) (PROBABLY 5/2[523]) GROUND STATES. IF 174AU IS
174AU9CP NEAR-SPHERICAL, ITS STRUCTURE MIGHT RESEMBLE THAT OF 166IR (AND
174AUACP POSSIBLY 170AU) WHERE A ((|p d{-3/2})~#(|n f{-7/2}))2- STATE IS
174AUBCP BELIEVED TO ACCOUNT FOR THE LOW-SPIN GS, BASED ON THE Nordheim STRONG
174AUCCP RULE (1997DA07), AND A (|p h{-11/2})(|n f{-7/2}) CONFIGURATION LEADS
174AUDCP VIA THE Nordheim WEAK RULE TO A JPI=9+ ISOMERIC STATE (1997DA07).
174AUECP HOWEVER, IF THE DEFORMATION IS LARGE ENOUGH FOR THE
174AUFCP Gallagher-Moszkowski RULE TO APPLY, A 3- AND 9+ ISOMER DOUBLET COULD
174AUGCP RESULT FROM COUPLING A 1/2[411] OR 1/2[400] PROTON OR A 11/2[505]
174AUHCP PROTON WITH A NEUTRON IN THE 5/2[523] (OR 5/2[512]) ORBITAL,
174AUICP CONSISTENT WITH JPI VALUES SUGGESTED BY 2004GOZZ AND SUPPORTED BY
174AUJCP HF<4 DEDUCED HERE FOR LOW-SPIN 174AU |a DECAY TO A POSSIBLE (3-)
174AUKCP 170IR G.S. ^The EVALUATOR VERY TENTATIVELY ADOPTS (3-) AND (9+) FOR
174AULCP THE 174AU ISOMERS.
174AU CP T$weighted average of
174AU2CP 163 MS 2 (6618A), 160 MS 5 (6548A), 171 MS 7 (6471A), 162 MS 4 (6433A),
174AU3CP ALL FROM 2004GOZZ. OTHERS: 119 MS 26 (1984SCZQ FOR 6626A);
174AU4CP 171 MS 29 (1996PA01, 6544A). ^T{-1/2}=120 MS 20 (1983SC24, 6530A)
174AU5CP AND 123 MS 20 (1984SCZQ, 6546A) ARE TENTATIVELY ASSOCIATED BY THE
174AU6CP EVALUATOR WITH A DIFFERENT 174AU STATE.
170IR N 1.0 LT
170IR CN BR |a decay observed by 1983SC24, 1996PA01, 2002RO17 and
170IR2CN 2004GOZZ. Gross B decay theory predicts a partial BETA decay
170IR3CN ^T{-1/2} of AP 1 S (1973TA30) for 174AU, SO %EC+B+ AP 16 IS EXPECTED;
170IR4CN THUS, %A may be SOMEWHAT LESS than 100.
170IR L 0.0+X (8+)
170IR A 6629 10 4 LT
170IR CA E weighted average of
170IR2CA 6637 13 (1996PA01) and 6618 15 (2004GOZZ; DE FROM TEXT ON p. 119).
170IR3CA OTHER EA: 6626 10 (1984SCZQ).
170IR CA HF IF IA=2 2, HF GE 400 400.
170IR CA Correlated with 6088A from 170IR (2004GOZZ).
170IR L 87+X 14 ?
170IR CL E FROM DIFFERENCE IN EA TO GS AND POSSIBLE EA TO THIS LEVEL.
170IR2CL LEVEL NOT ADOPTED BECAUSE 2004GOZZ IDENTIFY THEIR 6548A AS A SUM PEAK.
170IR A 6548 10 ?
170IR CA E FROM 2004GOZZ. OTHER: 6544 10 (1996PA01).
170IR2CA NOTE, HOWEVER, THAT THE PEAK AT THIS ENERGY IS IDENTIFIED
170IR3CA BY 2004GOZZ AS A SUM PEAK ARISING FROM
170IR4CA 6471A(174AU)-153ce(K)(170IR) COIN.
170IR5CA THE 6044A FROM 1996PA01 (CORRELATED WITH 6083A(170IR)) may ALSO
170IR6CA INCLUDE A SUM CONTRIBUTION AND/OR THE LINE FROM 174AU (139 MS);
170IR7CA HOWEVER, 1996PA01 DO NOT REPORT THE 6471A WITH WHICH THE 153-KEV
170IR8CA TRANSITION'S K CONVERSION ELECTRONS COULD SUM.
170IR CA Correlated with 6083A from 170IR (1996PA01,2002RO17,
170IR2CA 2004GOZZ). ^Coincident WITH Ir XK (2004GOZZ, FIG. 6.5c);
170IR3CA THE E=65.0 5 LINE FROM 2001KOZY IS PRESUMABLY THE Ir XK.
170IR L 153.2+X 5 (9+)
170IR A 6471 5 68.5 23 3.0 GT Z
170IR CA E from 2004GOZZ.
170IR CA IA SUM OF I(6471A)=32 3 AND I(6548 SUM PEAK)=35 3 (2004GOZZ)
170IR2CA EQUALS 67 4.
170IR cA HF$if %|a({+174}Au) is >83 then HF < 4 and this transition will be
170IR2cA unhindered.
170IR CA Correlated with 6088A from 170IR (2004GOZZ); coincident
170IR2CA WITH 153.2G.
170IR G 153.2 5 (M1) 1.81
170IRS G KC=1.50 3$LC=0.245 5$MC=0.0564 10$NC+=0.0165 3
170IRS G NC=0.01386 24$OC=0.00245 5$PC=0.000185 4
170IR CG M BASED ON STRENGTH OF IR XK RELATIVE TO I(153G) IN 6471A-|g
170IR2CG COIN SPECTRUM (2004GOZZ).
170IR L 191.2+X 5 (7-,8-,9-)
170IR A 6433 5 29.6 20 4.9 GT Z
170IR CA E from 2004GOZZ.
170IR CA Correlated with 6088A from 170IR (2004GOZZ). COINCIDENT
170IR2CA WITH 191.2G.
170IR G 191.2 5 (E1) 0.0764 12
170IRS G KC=0.0629 10$LC=0.01046 17$MC=0.00241 4$NC+=0.000689 11
170IRS G NC=0.000584 10$OC=9.92E-5 16$PC=5.90E-6 9
170IR CG M BASED ON ABSENCE OF IR XK IN THE 6433A-|g COIN SPECTRUM
170IR2CG CONTAINING THE 191G (2004GOZZ).