ENTRY            14458   20190508                             14531445800000001 
SUBENT        14458001   20190508                             14531445800100001 
BIB                  6          9                                 1445800100002 
TITLE      The Ratio of the Resonance Integral to the Thermal     1445800100003 
           Neutron Cross Section for Sm152                        1445800100004 
AUTHOR     (W.H.Walker,R.E.Green)                                 1445800100005 
REFERENCE  (J,CJP,39,1184,1961)                                   1445800100006 
           #doi:10.1139/p61-133                                   1445800100007 
INSTITUTE  (1CANCRC)                                              1445800100008 
FACILITY   (REAC,1CANCRC) The ZEEP (Zero Energy Experimental Pile)1445800100009 
            reactor.                                              1445800100010 
HISTORY    (20190508C) BP                                         1445800100011 
ENDBIB               9          0                                 1445800100012 
NOCOMMON             0          0                                 1445800100013 
ENDSUBENT           12          0                                 1445800199999 
SUBENT        14458002   20190508                             14531445800200001 
BIB                  6         46                                 1445800200002 
REACTION   ((62-SM-152(N,G)62-SM-153,,RI,,RNV)//                  1445800200003 
           (62-SM-152(N,G)62-SM-153,,SIG,,MXW))                   1445800200004 
DETECTOR   (NAICR) Two NaI(Tl) scintillation counters: The        1445800200005 
           counters were biased to accept all pulses              1445800200006 
           corresponding to gamma ray energies >30 keV.           1445800200007 
SAMPLE     (62-SM-152,ENR=0.9720)                                 1445800200008 
           (62-SM-144,ENR=0.0003)                                 1445800200009 
           (62-SM-147,ENR=0.0020)                                 1445800200010 
           (62-SM-148,ENR=0.0020)                                 1445800200011 
           (62-SM-149,ENR=0.0027)                                 1445800200012 
           (62-SM-149,ENR=0.0030)                                 1445800200013 
           (62-SM-154,ENR=0.0180) The sample material used in     1445800200014 
           these measurements contained >98% samarium. The main   1445800200015 
           contaminants were Cd (<0.1%), Pb (<0.l%), Zr (<0.1%),  1445800200016 
           Ce (<O.5%), Ir (<0.2%), and Eu (~0.1%). The samarium   1445800200017 
           was deposited as samarium oxide (Sm2O3) on a 0.0025    1445800200018 
           cm thick sheet of spectroscopically pure aluminum by   1445800200019 
           painting on a thin coat of lacquer containing about 8  1445800200020 
           microg/cm2 of samarium. The gold target material was   1445800200021 
           prepared by vacuum evaporation of pure gold onto       1445800200022 
           spectroscopically pure aluminum foils. Average         1445800200023 
           deposit thicknesses were determined by weighing the    1445800200024 
           backing foil before and after deposition. Six gold     1445800200025 
           targets were cut; four of these were 1 cm by 1 cm      1445800200026 
           square foils, ~450 microg/cm2 gold thickness, and the  1445800200027 
           other two were disks, ~210 microg/cm2 gold thickness   1445800200028 
           and the same diameter as the samarium foils.           1445800200029 
METHOD     (CADMB,ACTIV) Cadmium ratio measurements have been     1445800200030 
           made in similar lattice positions in ZEEP with thin    1445800200031 
           foils of Sm152 and gold. For the cadmium ratio         1445800200032 
           measurements the foils were placed in aluminum and     1445800200033 
           cadmium capsules having 0.076 cm thick walls. These    1445800200034 
           capsules were mounted on thin aluminum channels which  1445800200035 
           were, in turn, inserted into aluminum thimbles         1445800200036 
           attached to the ZEEP reactor lid.                      1445800200037 
ERR-ANALYS (ERR-T) Total uncertainty                              1445800200038 
           (ERR-1) The error in the ratio.                        1445800200039 
           (ERR-2) The error in the self-shielding factor of      1445800200040 
           152Sm.                                                 1445800200041 
           (ERR-3) The error in the self-shielding factor of      1445800200042 
           197Au.                                                 1445800200043 
           (ERR-4) The uncertainty in the correction for the      1445800200044 
           fact that the flux is not exactly 1/E.                 1445800200045 
           (ERR-5) Errors due to uncertainties in the physical    1445800200046 
           quantities are all negligible.                         1445800200047 
STATUS     (TABLE) Table III, page 1190.                          1445800200048 
ENDBIB              46          0                                 1445800200049 
COMMON               7          6                                 1445800200050 
EN-MIN-NM  EN-DUM-DN  ERR-1      ERR-2      ERR-3      ERR-4      1445800200051 
ERR-5                                                             1445800200052 
EV         EV         PER-CENT   PER-CENT   PER-CENT   PER-CENT   1445800200053 
PER-CENT                                                          1445800200054 
        0.5     0.0253        2.6        0.7        0.3        0.51445800200055 
        0.0                                                       1445800200056 
ENDCOMMON            6          0                                 1445800200057 
DATA                 2          1                                 1445800200058 
DATA       ERR-T                                                  1445800200059 
NO-DIM     NO-DIM                                                 1445800200060 
      14.65       0.41                                            1445800200061 
ENDDATA              3          0                                 1445800200062 
ENDSUBENT           61          0                                 1445800299999 
SUBENT        14458003   20190508                             14531445800300001 
BIB                  5         13                                 1445800300002 
REACTION   (62-SM-152(N,G)62-SM-153,,RI,,RNV)                     1445800300003 
REL-REF    (R,20638001,R.B.Tattersall+,J,JNE/A,12,32,1960) Thermal1445800300004 
            neutron cross section values.                         1445800300005 
ANALYSIS   From the measured cadmium ratio and two recent         1445800300006 
           thermal cross section measurements averaged at         1445800300007 
           212+-12 barns the resonance integral was calculated.   1445800300008 
           The Atlas of Neutron Resonances 2006 thermal cross     1445800300009 
           section value of 206+-6 barns would produce a          1445800300010 
           slightly different resonance integral.                 1445800300011 
ERR-ANALYS (DATA-ERR) The error is predominantly due to the       1445800300012 
           uncertainty in the 2200 m/sec cross section.           1445800300013 
STATUS     (DEP,14458002)                                         1445800300014 
           (TABLE) page 1190.                                     1445800300015 
ENDBIB              13          0                                 1445800300016 
NOCOMMON             0          0                                 1445800300017 
DATA                 3          1                                 1445800300018 
EN-MIN     DATA       DATA-ERR                                    1445800300019 
EV         B          B                                           1445800300020 
        0.5     3100.0      200.0                                 1445800300021 
ENDDATA              3          0                                 1445800300022 
ENDSUBENT           21          0                                 1445800399999 
SUBENT        14458004   20190508                             14531445800400001 
BIB                  3          8                                 1445800400002 
REACTION   (62-SM-152(N,G),,WID)                                  1445800400003 
ERR-ANALYS (DATA-ERR) For the 8-eV resonance in Sm152 the small   1445800400004 
           terms in resonance integral (I') and sigma (s0) are    1445800400005 
           about 0.20% and 0.l0%, respectively, of the first      1445800400006 
           term, so that for the ratio I'/s0 the error in         1445800400007 
           neglecting the small terms is about O.1%.              1445800400008 
STATUS     (DEP,14458002)                                         1445800400009 
           (TABLE) page 1191.                                     1445800400010 
ENDBIB               8          0                                 1445800400011 
NOCOMMON             0          0                                 1445800400012 
DATA                 3          1                                 1445800400013 
EN-RES     DATA       DATA-ERR                                    1445800400014 
EV         EV         EV                                          1445800400015 
        8.0      0.193      0.005                                 1445800400016 
ENDDATA              3          0                                 1445800400017 
ENDSUBENT           16          0                                 1445800499999 
ENDENTRY             4          0                                 1445899999999