ENTRY 21199 20070723 21862119900000001 SUBENT 21199001 20070723 21862119900100001 BIB 15 70 2119900100002 INSTITUTE (2UK NPL) 2119900100003 REFERENCE (J,JNE,23,205,196904) Main reference 2119900100004 AUTHOR (J.C.ROBERTSON, T.B.RYVES, E.J.AXTON, I.GOODIER, 2119900100005 A.WILLIAMS) 2119900100006 TITLE -A Measurement Of The Radiative Capture Cross Section 2119900100007 Of Gold At An Energy Of 966 keV- 2119900100008 FACILITY .NONE. 2119900100009 INC-SOURCE (PHOTO) Na-be Photoneutron Source Constructed At AWRE. 2119900100010 Source Consisted Of 2 Cm Diameter Sphere Of 2119900100011 Na-F With A 3 cm Thick Closely Fitting Shell 2119900100012 Of Beryllium, encased in 0.3mm thick stainless 2119900100013 steel shield. 2119900100014 INC-SPECT 1.067E+07 +- 0.5% n/sec at start of gold irradiation 2119900100015 was determinded by MANGB technique. 2119900100016 SAMPLE .Matched Pairs Of Thin Hemispherical Shells With Thin 2119900100017 Nickel Backings For Strength. Shells 3 And 4 cm In 2119900100018 Radius, Gold 0.019 mm Thick, Backings 0.05 cm Thick. 2119900100019 After irradiation separated gold prepared in form of: 2119900100020 - discs 1.905cm diameter, 0.0125 cm thick -for PROPC 2119900100021 counter measurement, 2119900100022 - liquid samples for NAICR Measurement. 2119900100023 METHOD (ACTIV) Activation of samoles. 2119900100024 (COINC) 4pi-beta-gamma coincidence counting for 2119900100025 calibration. 2119900100026 (MANGB) Two separate determinations of source strength 2119900100027 were made using the manganese bath technique. 2119900100028 DETECTOR (PROPC) 4-pi Beta Counter, Calibrated By Irradiating 2119900100029 Sample Foils In GLEEP Reactor And Using A 2119900100030 4-pi Beta/Gamma Coincidence Counter. 2119900100031 (NAICR) Two NaI(Tl) Well Crystals To Count Decay 2119900100032 Gammas. Calibration Using Gold Solutions 2119900100033 Standardised By 4-pi Beta/Gamma Counting. 2119900100034 PART-DET (B) Betas. 2119900100035 (DG) Decay Gammas. 2119900100036 STATUS (NDD) From NEUDADA. 2119900100037 CORRECTION .Correction Factor To Allow For The Fact That The 2119900100038 Neutrons Are Not Monoenergetic And Do Not Pass 2119900100039 Through The Gold Shells Normally Calculated By Monte- 2119900100040 Carlo Method. Correction Factor 1.028+-0.005 For The 2119900100041 Smaller Shell, 1.025+-0.005 For The Larger. 2119900100042 .background due to scattering in the gold shells and 2119900100043 nickel backings, in the cadmium-gold lined shell, and 2119900100044 room and air scattered backgrounds corrected using 2119900100045 the methods of RYVES+,J.NUCL.ENERGY,20,(1966),249. 2119900100046 Correction 2.1+-0.5 Percent For The 3 Cm Diameter 2119900100047 Sphere, 2.7+-0.5 Percent For The 4 Cm Sphere. 2119900100048 .Aluminium Can Surrounding The Sample Gave Additional 2119900100049 Activity Of 0.2 And 0.4 Percent For The Smaller And 2119900100050 Larger Shells Respectively. 2119900100051 .Correction For Resonance Self-shielding Negligible. 2119900100052 .Correction Made For Inelastic Scattering Of Source 2119900100053 Neutrons From The Source Structure. 2119900100054 .Correction For Compton Scattering Of Source Gammas 2119900100055 To Energies Above The Be Photo-threshold, Yielding 2119900100056 Neutrons Below 966 keV. Correction 2.0+-0.5 Percent 2119900100057 For Both Spheres. 2119900100058 ERR-ANALYS (ERR-SYS) Quadratic Addition Of Four 0.5 % Systematic 2119900100059 Errors To Give Total Systematic Error Of 1%. 2119900100060 (ERR-S) Random Error. 2119900100061 (ERR-T) Total Error. 2119900100062 (ERR-1) Error due scattered neutron contribution. 2119900100063 (ERR-2) Error due Compton scattering of gamma-rays in 2119900100064 source. 2119900100065 HISTORY (19791129T) 2119900100066 (19800110E) 2119900100067 (19810504A) Err-analys Changed. 2119900100068 (19810722E) 2119900100069 (20070723A) M.M. Dates were corrected for 4-digit year.2119900100070 BIB information was added. 2119900100071 (20070727U) Final corrections have been done - SM 2119900100072 ENDBIB 70 0 2119900100073 NOCOMMON 0 0 2119900100074 ENDSUBENT 73 0 2119900199999 SUBENT 21199002 20070723 21862119900200001 BIB 3 6 2119900200002 REACTION (79-AU-197(N,G)79-AU-198-G,,SIG) 2119900200003 .Data Is The Mean Of 95.6 Mb, Obtained With The 4 Cm 2119900200004 Diameter Sphere, And 96.8 Mb, Obtained With The 3 Cm 2119900200005 Diameter Sphere. 2119900200006 STATUS (TABLE) .Table 3 of the publication. 2119900200007 HISTORY (20070723A) M.M. ERR-1 and ERR-2 were added. 2119900200008 ENDBIB 6 0 2119900200009 NOCOMMON 0 0 2119900200010 DATA 7 1 2119900200011 EN DATA ERR-SYS ERR-S ERR-T ERR-1 2119900200012 ERR-2 2119900200013 KEV MB MB MB MB PER-CENT 2119900200014 PER-CENT 2119900200015 9.6600E+02 9.6200E+01 1.0000E+00 1.0000E+00 2.0000E+00 0.5 2119900200016 0.5 2119900200017 ENDDATA 6 0 2119900200018 ENDSUBENT 17 0 2119900299999 ENDENTRY 2 0 2119999999999