ENTRY G0013 20060729 G014G001300000001 SUBENT G0013001 20060729 G014G001300100001 BIB 15 39 G001300100002 TITLE Absolute photoneutron cross section of I-127 G001300100003 AUTHOR (R.P.Rassool,M.N.Thompson) G001300100004 INSTITUTE (3AULAML) G001300100005 REFERENCE (J,PR/C,39,(4),1631,198904) G001300100006 FACILITY (BETAT) 35 MeV betatron at the University of Melbourne G001300100007 INC-SOURCE (BRST) G001300100008 MONITOR the photon dose was measured using a thin-walled G001300100009 transmission ion chamber the response of which was G001300100010 intercalibrated against that of a standard replica G001300100011 nbs p2 chamber. G001300100012 SAMPLE 103 gram sample of solid iodine. G001300100013 DETECTOR (D4PI,BF3) a halpern type neutron detector. The G001300100014 neutron detection efficiency was determined from G001300100015 measurements using calibrated neutron sources and G001300100016 confirmed from a measurement of the D(gamma,p)n G001300100017 reaction cross section. G001300100018 METHOD (EXTB) 5 independent yield curves were collected at G001300100019 photon energies ranging from 8 to 25 MeV in 200 keV G001300100020 intervals from which an average yield curve was G001300100021 determined. A similar procedure was used to determine G001300100022 an average background yield curve without sample. The G001300100023 latter being small, amounting to 0.02% Of the sample- G001300100024 in yield at 15 MeV and rising to 0.4% At 28 MeV. G001300100025 ANALYSIS (PLA) the cross section was analyzed using the G001300100026 variable-bin-penfold-leiss method. The resulting G001300100027 I-127( gamma,xn) reaction cross section includes the G001300100028 I-127( gamma,n) and twice the I-127( gamma,2n) reactionG001300100029 cross sections. Allowance for the latter cross section G001300100030 was done on the basis of a statistical decay model. G001300100031 CORRECTION the resulting net yield curve was corrected for G001300100032 dead-time effects (< 5%). G001300100033 ERR-ANALYS (ERR-S) the errors include statistical uncertainties G001300100034 (ERR-SYS) an overall systematic uncertainty of 7% due G001300100035 primarily the uncertainty in the neutron detector G001300100036 efficiency. G001300100037 STATUS (TABLE) the data are from private communication G001300100038 corresponding fig.1 Of Phys.Rev.C,vol 39,no 4,(1989) G001300100039 HISTORY (19920205C) HW G001300100040 (20060729A) BIB section updated. Sub.003 added. G001300100041 ENDBIB 39 0 G001300100042 COMMON 1 3 G001300100043 ERR-SYS G001300100044 PER-CENT G001300100045 7.0 G001300100046 ENDCOMMON 3 0 G001300100047 ENDSUBENT 46 0 G001300199999 SUBENT G0013002 20060729 G014G001300200001 BIB 2 6 G001300200002 REACTION (53-I-127(G,X)0-NN-1,,SIG,,BRS) G001300200003 This cross section is the sum of the (y,n) cross G001300200004 section plus two times the contribution of the (y,2n) G001300200005 cross section. G001300200006 STATUS (TABLE) the data are from private communication G001300200007 corresponding fig.1 Of Phys.Rev.C,vol 39,no 4,(1989) G001300200008 ENDBIB 6 0 G001300200009 NOCOMMON 0 0 G001300200010 DATA 3 101 G001300200011 EN DATA ERR-S G001300200012 MEV MB MB G001300200013 .85400E+1 .9296E-01 .9296E-01 G001300200014 .86250E+1 .1603E+00 .7168E-01 G001300200015 .87100E+1 .7530E+00 .1331E+00 G001300200016 .87950E+1 .1693E+01 .1755E+00 G001300200017 .88800E+1 .3015E+01 .2085E+00 G001300200018 .90800E+1 .4946E+01 .2659E+00 G001300200019 .93950E+1 .9278E+01 .4041E+00 G001300200020 .97100E+1 .1682E+02 .6236E+00 G001300200021 .10025E+2 .2305E+02 .1083E+01 G001300200022 .10225E+2 .2690E+02 .1361E+01 G001300200023 .10425E+2 .3074E+02 .1618E+01 G001300200024 .10625E+2 .3274E+02 .1879E+01 G001300200025 .10825E+2 .3246E+02 .2143E+01 G001300200026 .11025E+2 .4413E+02 .2404E+01 G001300200027 .11225E+2 .4697E+02 .2726E+01 G001300200028 .11425E+2 .4587E+02 .3016E+01 G001300200029 .11625E+2 .5783E+02 .3346E+01 G001300200030 .11825E+2 .6472E+02 .3615E+01 G001300200031 .12025E+2 .6794E+02 .4007E+01 G001300200032 .12225E+2 .8097E+02 .4361E+01 G001300200033 .12425E+2 .9699E+02 .4648E+01 G001300200034 .12625E+2 .1034E+03 .5078E+01 G001300200035 .12825E+2 .1251E+03 .5407E+01 G001300200036 .13140E+2 .1386E+03 .8866E+01 G001300200037 .13225E+2 .1519E+03 .6304E+01 G001300200038 .13540E+2 .1670E+03 .1009E+02 G001300200039 .13740E+2 .2098E+03 .1080E+02 G001300200040 .13940E+2 .2110E+03 .1154E+02 G001300200041 .14140E+2 .2358E+03 .1227E+02 G001300200042 .14340E+2 .2797E+03 .1300E+02 G001300200043 .14540E+2 .2524E+03 .1384E+02 G001300200044 .14740E+2 .2933E+03 .1465E+02 G001300200045 .14940E+2 .2486E+03 .1551E+02 G001300200046 .15025E+2 .2756E+03 .1094E+02 G001300200047 .15340E+2 .2851E+03 .1724E+02 G001300200048 .15540E+2 .2583E+03 .1813E+02 G001300200049 .15625E+2 .2727E+03 .1272E+02 G001300200050 .15825E+2 .2995E+03 .1325E+02 G001300200051 .16025E+2 .2664E+03 .1388E+02 G001300200052 .16225E+2 .2634E+03 .1446E+02 G001300200053 .16425E+2 .2431E+03 .1456E+02 G001300200054 .16625E+2 .2351E+03 .1421E+02 G001300200055 .16825E+2 .1821E+03 .1375E+02 G001300200056 .16910E+2 .1952E+03 .9960E+01 G001300200057 .17225E+2 .1819E+03 .1288E+02 G001300200058 .17310E+2 .1809E+03 .9369E+01 G001300200059 .17625E+2 .1528E+03 .1232E+02 G001300200060 .17710E+2 .1521E+03 .9008E+01 G001300200061 .17910E+2 .1577E+03 .8895E+01 G001300200062 .18110E+2 .1543E+03 .8824E+01 G001300200063 .18310E+2 .1427E+03 .8782E+01 G001300200064 .18510E+2 .1171E+03 .8766E+01 G001300200065 .18710E+2 .1218E+03 .8776E+01 G001300200066 .18910E+2 .1115E+03 .8787E+01 G001300200067 .18995E+2 .1075E+03 .6796E+01 G001300200068 .19195E+2 .1041E+03 .6832E+01 G001300200069 .19395E+2 .8745E+02 .6868E+01 G001300200070 .19595E+2 .8484E+02 .6917E+01 G001300200071 .19680E+2 .7651E+02 .5548E+01 G001300200072 .19880E+2 .8633E+02 .5572E+01 G001300200073 .20195E+2 .7130E+02 .7038E+01 G001300200074 .20280E+2 .7806E+02 .5647E+01 G001300200075 .20480E+2 .6989E+02 .5695E+01 G001300200076 .20680E+2 .6438E+02 .5740E+01 G001300200077 .20765E+2 .6401E+02 .4732E+01 G001300200078 .20965E+2 .6213E+02 .4770E+01 G001300200079 .21165E+2 .5306E+02 .4798E+01 G001300200080 .21365E+2 .7165E+02 .4837E+01 G001300200081 .21680E+2 .6810E+02 .5940E+01 G001300200082 .21765E+2 .5796E+02 .4895E+01 G001300200083 .21965E+2 .5327E+02 .4929E+01 G001300200084 .22050E+2 .4769E+02 .4155E+01 G001300200085 .22250E+2 .5477E+02 .4182E+01 G001300200086 .22565E+2 .4576E+02 .5017E+01 G001300200087 .22650E+2 .4311E+02 .4226E+01 G001300200088 .22735E+2 .3895E+02 .3623E+01 G001300200089 .22935E+2 .4582E+02 .3648E+01 G001300200090 .23250E+2 .3538E+02 .4281E+01 G001300200091 .23335E+2 .3820E+02 .3668E+01 G001300200092 .23535E+2 .3818E+02 .3674E+01 G001300200093 .23735E+2 .3637E+02 .3682E+01 G001300200094 .23935E+2 .4318E+02 .3708E+01 G001300200095 .24135E+2 .4132E+02 .3726E+01 G001300200096 .24335E+2 .3097E+02 .3753E+01 G001300200097 .24420E+2 .2959E+02 .3266E+01 G001300200098 .24505E+2 .2877E+02 .2875E+01 G001300200099 .24705E+2 .3339E+02 .2886E+01 G001300200100 .25020E+2 .3391E+02 .3308E+01 G001300200101 .25220E+2 .2269E+02 .3315E+01 G001300200102 .25305E+2 .2389E+02 .2920E+01 G001300200103 .25390E+2 .1767E+02 .2597E+01 G001300200104 .25475E+2 .2328E+02 .2329E+01 G001300200105 .25790E+2 .1503E+02 .2611E+01 G001300200106 .25875E+2 .1649E+02 .2342E+01 G001300200107 .25960E+2 .1692E+02 .2117E+01 G001300200108 .26045E+2 .1662E+02 .1926E+01 G001300200109 .26245E+2 .1820E+02 .1932E+01 G001300200110 .26560E+2 .4398E+01 .2142E+01 G001300200111 .26645E+2 .5677E+01 .1946E+01 G001300200112 .26730E+2 .3645E+01 .1781E+01 G001300200113 .26815E+2 .1987E+01 .1641E+01 G001300200114 ENDDATA 103 0 G001300200115 ENDSUBENT 114 0 G001300299999 SUBENT G0013003 20060804 G014G001300300001 BIB 3 8 G001300300002 REACTION (53-I-127(G,2N)53-I-125,,SIG,,BRS,CALC) - estimated. G001300300003 Allowance for the 127I(g,2n) cross section was made G001300300004 on the basis of a statistical decay model which has G001300300005 been well tested for medium to heavy nuclei. G001300300006 (R.W.Sambell, etc. Nucl. Phys.A205,139,1973) G001300300007 ERR-ANALYS (EN-ERR-DIG) Digitizing error G001300300008 (ERR-DIG) Digitizing error G001300300009 STATUS (CURVE) SD: digitized points from fig.1 G001300300010 ENDBIB 8 0 G001300300011 COMMON 2 3 G001300300012 EN-ERR-DIG ERR-DIG G001300300013 MEV MB G001300300014 0.21598E-010.36948 G001300300015 ENDCOMMON 3 0 G001300300016 DATA 3 39 G001300300017 EN DATA ERR-S G001300300018 MEV MB MB G001300300019 16.315 0.29241 G001300300020 16.520 3.7582 G001300300021 16.725 14.423 G001300300022 16.919 23.359 1.7277 G001300300023 16.998 29.985 1.4397 G001300300024 17.203 44.681 2.0156 G001300300025 17.510 60.821 4.8950 G001300300026 17.590 64.569 3.4553 G001300300027 17.795 70.050 4.3191 G001300300028 18.000 71.212 4.3191 G001300300029 18.194 74.678 5.1830 G001300300030 18.389 73.248 5.7588 G001300300031 18.596 61.165 4.0312 G001300300032 18.789 69.525 6.9100 G001300300033 18.881 63.771 4.8950 G001300300034 19.087 63.781 5.4709 G001300300035 19.293 58.897 5.4721 G001300300036 19.361 59.764 4.0312 G001300300037 19.579 51.713 4.3197 G001300300038 19.648 52.004 4.0312 G001300300039 19.853 59.501 4.3191 G001300300040 20.173 53.471 2.0156 G001300300041 20.242 54.338 3.7432 G001300300042 20.460 41.104 4.0318 G001300300043 20.540 43.699 3.1674 G001300300044 20.734 42.846 3.4559 G001300300045 20.940 37.961 4.3197 G001300300046 21.020 39.693 3.7432 G001300300047 21.226 35.672 3.7438 G001300300048 21.306 33.085 2.8794 G001300300049 21.500 31.367 3.1668 G001300300050 21.706 28.210 3.1674 G001300300051 21.786 27.638 3.1679 G001300300052 21.878 25.339 2.8794 G001300300053 22.073 22.758 3.1674 G001300300054 22.152 25.641 2.3030 G001300300055 22.358 20.757 2.3035 G001300300056 22.438 25.656 1.7271 G001300300057 22.758 23.081 2.8788 G001300300058 ENDDATA 41 0 G001300300059 ENDSUBENT 58 0 G001300399999 ENDENTRY 3 0 G001399999999