ENTRY 30182 20080208 31263018200000001 SUBENT 30182001 20080208 31263018200100001 BIB 14 21 3018200100002 INSTITUTE (3ISLHFA) 3018200100003 REFERENCE (J,PR/C,6,315,197207) 3018200100004 AUTHOR (D.Maor Zellermayer,B.Rosner) 3018200100005 TITLE Isomeric cross-section ratios in the reactions 3018200100006 Ir-191(n,2n)Ir-190 and Au-197(n,2n) 3018200100007 EXP-YEAR (1971) 3018200100008 FACILITY 200 kV Kaman nuclear A-1003 deuteron accelerator 3018200100009 INC-SOURCE (D-T) deuteron tritium. 3018200100010 METHOD (ACTIV) Activation method 3018200100011 DETECTOR (GELI) Ge(Li) detector plus multichannel analyzer 3018200100012 COMMENT For the Ir-191(n,2n) reaction the experimental isomeric3018200100013 ratios are in accord with the calculated values,using 3018200100014 r0 = 1.2 Fermi.On the other hand,for the Au-197(n,2n) 3018200100015 reaction the experimental results are in poor agreement3018200100016 with the theoretical predictions 3018200100017 STATUS (TABLE) Data taken from PR/C 6,315,7207 3018200100018 HISTORY (19730622C) FM 3018200100019 (19770907U) OS. Bib update. 3018200100020 (20080208A) BIB section updated 3018200100021 CORRECTION No details given 3018200100022 ERR-ANALYS No details given 3018200100023 ENDBIB 21 0 3018200100024 COMMON 1 3 3018200100025 EN 3018200100026 MEV 3018200100027 1.4000E+01 3018200100028 ENDCOMMON 3 0 3018200100029 ENDSUBENT 28 0 3018200199999 SUBENT 30182002 20080208 31263018200200001 BIB 5 16 3018200200002 REACTION (77-IR-191(N,2N)77-IR-190-M2/G+M1,,SIG/RAT) 3018200200003 SAMPLE 2 grams of natural iridium powder 3018200200004 METHOD Cross section ratio determined from ratio of gamma 3018200200005 intensities in the decay of the 11- state and the 7+ 3018200200006 plus 4+ states. 3018200200007 PART-DET (DG) 616.5- and 502.5-keV lines following decay of the 3018200200008 11-isomer and 603.3-,569.3-,557.8-and 518.4-gamma lines3018200200009 following beta decay of 4+ state of Ir-190 3018200200010 DECAY-DATA (77-IR-190-M2,3.2HR,DG,502.5,, 3018200200011 DG,616.5) 3018200200012 half life for isomeric state 11- 3018200200013 (77-IR-190-M1,1.2HR,B+) half life for isomeric state 7+3018200200014 (77-IR-190-G,12.1D,DG,518.4,, 3018200200015 DG,557.8,, 3018200200016 DG,569.3) 3018200200017 half-life for the ground state 4+ 3018200200018 ENDBIB 16 0 3018200200019 NOCOMMON 0 0 3018200200020 DATA 2 1 3018200200021 DATA DATA-ERR 3018200200022 NO-DIM NO-DIM 3018200200023 5.0000E-02 5.0000E-03 3018200200024 ENDDATA 3 0 3018200200025 ENDSUBENT 24 0 3018200299999 SUBENT 30182003 20080208 31263018200300001 BIB 3 9 3018200300002 REACTION (77-IR-191(N,2N)77-IR-190-M1/G,,SIG/RAT) 3018200300003 METHOD Cross section determined from data of experiment of 3018200300004 subent 30182.002 by careful analysis of the decay rate 3018200300005 of the Ir-190 ground state. 3018200300006 DECAY-DATA (77-IR-190-M1,1.2HR,B+) half life for isomeric state 7+3018200300007 (77-IR-190-G,12.1D,DG,518.4,, 3018200300008 DG,557.8,, 3018200300009 DG,569.3) 3018200300010 half-life for the ground state 4+ 3018200300011 ENDBIB 9 0 3018200300012 NOCOMMON 0 0 3018200300013 DATA 2 1 3018200300014 DATA DATA-ERR 3018200300015 NO-DIM NO-DIM 3018200300016 4.0000E-01 1.0000E-01 3018200300017 ENDDATA 3 0 3018200300018 ENDSUBENT 17 0 3018200399999 SUBENT 30182004 20080208 31263018200400001 BIB 5 15 3018200400002 REACTION (79-AU-197(N,2N)79-AU-196-M2/G+M1,,SIG/RAT) 3018200400003 Ratio of cross sections for 3018200400004 populating the 12- isomer to the sum of those 3018200400005 populating the 5+(ms) and 2-(gnd) states 3018200400006 SAMPLE A 10 millig/cm2 thick gold foil. 3018200400007 METHOD Cross section ratio was determined from the intensity 3018200400008 ratios of the 148- and 356-keV lines from the decay of 3018200400009 the 12- isomer and 2- ground states 3018200400010 PART-DET (DG) decay gammas 3018200400011 DECAY-DATA (79-AU-196-M2,9.7HR,DG,148.) 3018200400012 half-life for isomeric state 12- 3018200400013 (79-AU-196-M1,8.2SEC,XR) 3018200400014 half-life for isomeric state 5+ 3018200400015 (79-AU-196-G,6.17D,DG,356.) 3018200400016 half-life for the ground state j=2- 3018200400017 ENDBIB 15 0 3018200400018 NOCOMMON 0 0 3018200400019 DATA 2 1 3018200400020 DATA DATA-ERR 3018200400021 NO-DIM NO-DIM 3018200400022 8.0000E-02 1.0000E-02 3018200400023 ENDDATA 3 0 3018200400024 ENDSUBENT 23 0 3018200499999 SUBENT 30182005 20080208 31263018200500001 BIB 5 13 3018200500002 REACTION (79-AU-197(N,2N)79-AU-196-M1/M2,,SIG/RAT) 3018200500003 SAMPLE 10-millig/cm2 and 400 microg/cm2 gold foils 3018200500004 METHOD Cross section ratio obtained by comparing the intensity3018200500005 of the 148-keV line originated in the decay of the 12- 3018200500006 isomer with the l x-ray spectrum emitted in the decay 3018200500007 of the 5+ isomer 3018200500008 DETECTOR (NAICR) thin NaI scintillator with a Be window coupled 3018200500009 to a low-noise photomultiplier for x-ray measurements. 3018200500010 (GELI) Ge(Li) detector for gamma ray measurements 3018200500011 DECAY-DATA (79-AU-196-M2,9.7HR,DG,148.) 3018200500012 half-life for isomeric state 12- 3018200500013 (79-AU-196-M1,8.2SEC,XR) 3018200500014 half-life for isomeric state 5+ 3018200500015 ENDBIB 13 0 3018200500016 NOCOMMON 0 0 3018200500017 DATA 2 1 3018200500018 DATA DATA-ERR 3018200500019 NO-DIM NO-DIM 3018200500020 2.2000E+00 3.0000E-01 3018200500021 ENDDATA 3 0 3018200500022 ENDSUBENT 21 0 3018200599999 SUBENT 30182006 20080208 31263018200600001 BIB 2 7 3018200600002 REACTION ((79-AU-197(N,2N)79-AU-196,,SIG)/ 3018200600003 (77-IR-191(N,2N)77-IR-190,,SIG)) 3018200600004 METHOD Cross sections ratio was determined by bombarding for 3018200600005 an hour a sandwich of a gold and an iridium foil, each 3018200600006 10 millig/cm2 thick,and two days later comparing the 3018200600007 intensities of the gamma-rays emitted in the decay of 3018200600008 their respective ground states 3018200600009 ENDBIB 7 0 3018200600010 NOCOMMON 0 0 3018200600011 DATA 2 1 3018200600012 DATA DATA-ERR 3018200600013 NO-DIM NO-DIM 3018200600014 1.2000E+00 2.0000E-01 3018200600015 ENDDATA 3 0 3018200600016 ENDSUBENT 15 0 3018200699999 ENDENTRY 6 0 3018299999999