ENTRY 14688 20210309 14821468800000001 SUBENT 14688001 20210309 14821468800100001 BIB 12 26 1468800100002 TITLE The Absorption Cross Section of Gold for Neutrons of 1468800100003 Energies from 0.01 to 0.3 Ev 1468800100004 AUTHOR (B.D.McDaniel,R.B.Sutton,L.S.Lavatelli,E.E.Anderson) 1468800100005 REFERENCE (J,PR,72,729(1),1947) 1468800100006 #doi:10.1103/physrev.72.729 1468800100007 (R,MDDC-232,1946) Preliminary results. 1468800100008 REL-REF (R,12184001,W.W.Havens Jr+,J,PR,71,165,1947) Gold 1468800100009 resonance energy. 1468800100010 INSTITUTE (1USALAS) 1468800100011 FACILITY (CYCLO,1USALAS) 42-inch Los Alamos cyclotron. 1468800100012 INC-SOURCE (D-BE) 1468800100013 DETECTOR (BF3) 1468800100014 SAMPLE A gold sheet, 3.01 g/cm2 thick. 1468800100015 METHOD (TOF) Neutrons of high energy were produced by 1468800100016 bombardment of a Be target with deuterons. The 1468800100017 neutrons were slowed down in a moderating medium near 1468800100018 the cyclotron chamber. The moderator consisted of a 1468800100019 5-cm thickness of a solution of 7 g of B203 per 1468800100020 liter of water, boron being used to shorten the mean 1468800100021 life of the source. Neutron energies were determined 1468800100022 by measuring their time of Right over a 7.6-meter 1468800100023 path from the moderator to a BF3-ion chamber. 1468800100024 CORRECTION Corrections, which amortized to less than 3 percent 1468800100025 of the time of flight, were made to take account of 1468800100026 the 68-microsecond mean life of the moderator. 1468800100027 HISTORY (20210309C) BP 1468800100028 ENDBIB 26 0 1468800100029 NOCOMMON 0 0 1468800100030 ENDSUBENT 29 0 1468800199999 SUBENT 14688002 20210309 14821468800200001 BIB 3 3 1468800200002 REACTION (79-AU-197(N,TOT),,SIG) 1468800200003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. 1468800200004 STATUS (CURVE) Figure, page 729. 1468800200005 ENDBIB 3 0 1468800200006 NOCOMMON 0 0 1468800200007 DATA 3 12 1468800200008 EN DATA DATA-ERR 1468800200009 EV B B 1468800200010 -0.110 132.030 4.743 1468800200011 -0.047 116.638 3.929 1468800200012 0.014 113.055 4.723 1468800200013 0.078 108.304 3.536 1468800200014 0.138 94.080 3.943 1468800200015 0.166 86.367 3.149 1468800200016 0.195 87.714 3.549 1468800200017 0.231 78.467 2.755 1468800200018 0.290 67.786 3.549 1468800200019 0.349 57.885 2.782 1468800200020 0.407 46.409 2.755 1468800200021 0.468 36.521 2.762 1468800200022 ENDDATA 14 0 1468800200023 ENDSUBENT 22 0 1468800299999 SUBENT 14688003 20210309 14821468800300001 BIB 3 3 1468800300002 REACTION (79-AU-197(N,TOT),,SIG) 1468800300003 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. 1468800300004 STATUS (TABLE) Page 729. 1468800300005 ENDBIB 3 0 1468800300006 NOCOMMON 0 0 1468800300007 DATA 3 1 1468800300008 EN DATA DATA-ERR 1468800300009 EV B B 1468800300010 0.025 104.0 2.0 1468800300011 ENDDATA 3 0 1468800300012 ENDSUBENT 11 0 1468800399999 SUBENT 14688004 20210309 14821468800400001 BIB 3 14 1468800400002 REACTION (79-AU-197(N,TOT),,WID,,SQ/S0) 1468800400003 ANALYSIS Under this assumption, the total cross section in the 1468800400004 region investigated is expected to follow the 1468800400005 approximate relation given below. sigmat = alpha 1468800400006 sqrt(Er/E)*(1+2E/Er) + sigmas, sigmat = total cross 1468800400007 section, E = neutron energy, Er = resonance energy = 1468800400008 4.8 eV. The scattering cross section sigmas, is 1468800400009 assumed to be approximately constant, while alpha is 1468800400010 a constant depending on the Breit-Wigner parameters 1468800400011 of the 4.8-eV resonance as is given below. alpha = 1468800400012 sigma0 Gamma**2 /4*Er**2, sigma0 = cross section at 1468800400013 resonance, and Gamma = resonance width. 1468800400014 STATUS (DEP,14688002) 1468800400015 (TABLE) Page 729. 1468800400016 ENDBIB 14 0 1468800400017 NOCOMMON 0 0 1468800400018 DATA 2 1 1468800400019 EN-RES DATA 1468800400020 EV B*EV-SQ 1468800400021 4.8 625.0 1468800400022 ENDDATA 3 0 1468800400023 ENDSUBENT 22 0 1468800499999 ENDENTRY 4 0 1468899999999