ENTRY 30018 20080215 31253001800000001 SUBENT 30018001 20080215 31253001800100001 BIB 7 20 3001800100002 INSTITUTE (3RUMBUC) 3001800100003 REFERENCE (J,NUK,4,165,196206) experiment and graph 3001800100004 AUTHOR (H.Teutsch, N.Mateescu, P.Timis) 3001800100005 TITLE Measurement of absorption cross-section of gold for 3001800100006 thermal neutrons 3001800100007 STATUS (APRVD) approved by Mateescu (19721019) 3001800100008 HISTORY (19700818C) 3001800100009 (19711027A) q-modifier par instead of drt. 3001800100010 Data were eliminated from set because they are given 3001800100011 in 1/V portion of (n,gamma) cross-section assuming a 3001800100012 resonance portion of (1.70 Barn)/(wave-length in 3001800100013 angstrom). 3001800100014 (20080215A) BIB section updated. 3001800100015 ERR-ANALYS Statistics and the following systematic errors 3001800100016 1. Uncertainty in zero point of analyser 3001800100017 2. Uncertainty in channel width 3001800100018 3. Uncertainty in flight path 3001800100019 4. Uncertainty in sample thickness 3001800100020 5. Variations in sample thickness and geometry 3001800100021 6. Uncertainties in corrections made 3001800100022 ENDBIB 20 0 3001800100023 NOCOMMON 0 0 3001800100024 ENDSUBENT 23 0 3001800199999 SUBENT 30018002 20080215 31253001800200001 BIB 10 24 3001800200002 REACTION (79-AU-197(N,G)79-AU-198,,SIG,,RV) 3001800200003 data given is 1/V portion of 3001800200004 (n,gamma) cross-section assuming a resonance portion 3001800200005 of (1.70 Barn)/(wave-length in angstrom) 3001800200006 FACILITY (REAC,CHOPS) chopper with curved slits 3001800200007 INC-SOURCE (REAC) reactor, Cd collimator gave 2.5 x 2.5 cm beam 3001800200008 SAMPLE Two Au foils of 99.99% purity were placed on 3001800200009 each other to form plate of 3x3 cm and average 3001800200010 thickness of 0.757 grams/cm2 3001800200011 METHOD (TOF) time of flight, rotating speed of chopper was 3001800200012 3115 +- 15 revs per minute 3001800200013 flight path was 3 meters, counter perpendiuclar to the 3001800200014 beam 3001800200015 DETECTOR (BF3) bf3 counter of 35 mm diameter 3001800200016 PART-DET (N) neutron 3001800200017 STATUS (TABLE) Data from H.Teutsch 1970 3001800200018 CORRECTION After corrections to the experimental data the total 3001800200019 cross-section was found, to obtain the 1/V absorption 3001800200020 cross-section from this the following corrections were 3001800200021 applied 3001800200022 Spin dependent incoherent scattering taken=.5+-.26 Barn3001800200023 thermal inelastic scattering=(.03+-.02)Lambda barn 3001800200024 contribution of resonance at 4.906eV (1.70)/Lambda barn3001800200025 HISTORY (20080215S) Dataset was restored. 3001800200026 ENDBIB 24 0 3001800200027 COMMON 2 3 3001800200028 EN-MIN EN-MAX 3001800200029 MILLI-EV MILLI-EV 3001800200030 1.1 2.5 3001800200031 ENDCOMMON 3 0 3001800200032 DATA 3 21 3001800200033 WVE-LN DATA DATA-ERR 3001800200034 ANGSTROM B B 3001800200035 5.68 310. 2. 3001800200036 5.84 321. 2. 3001800200037 6.00 327. 2. 3001800200038 6.15 334. 2. 3001800200039 6.31 344. 2. 3001800200040 6.47 347. 3. 3001800200041 6.63 359. 3. 3001800200042 6.79 368. 3. 3001800200043 6.94 383. 3. 3001800200044 7.10 390. 4. 3001800200045 7.26 395. 4. 3001800200046 7.42 397. 4. 3001800200047 7.58 412. 5. 3001800200048 7.74 426. 5. 3001800200049 7.89 435. 6. 3001800200050 8.05 436. 6. 3001800200051 8.21 453. 7. 3001800200052 8.37 461. 8. 3001800200053 8.53 473. 9. 3001800200054 8.68 460. 10. 3001800200055 8.84 472. 11. 3001800200056 ENDDATA 23 0 3001800200057 ENDSUBENT 56 0 3001800299999 SUBENT 30018003 20080215 31253001800300001 BIB 6 16 3001800300002 REACTION (79-AU-197(N,G)79-AU-198,,SIG,,RV,DERIV) 3001800300003 Data given is 1/V portion of 3001800300004 (n,gamma) cross-section assuming a resonance portion 3001800300005 of (1.70 Barn)/(wave-length in angstrom) 3001800300006 ANALYSIS A fit to the measured data in energy range 1.1-2.5 3001800300007 milli-eV was made using the least square method with 3001800300008 weighted points. The function chosen was of the form 3001800300009 sigma=a+B*lambda, where lambda=wave-length of neutrons3001800300010 in angstroms. B was found to be 54.47+-0.10 Barn/ 3001800300011 angstrom. From this the sigma value at 2200 m/sec was 3001800300012 calculated. 3001800300013 MONITOR Absolute. Energy range 1.1-2.5 milli-eV. 3001800300014 PART-DET (N) neutrons 3001800300015 STATUS Extrapolation from data in energy range 1.1-2.5 3001800300016 milli-eV. Data taken from Nukleonik 4,165 6/1962. 3001800300017 HISTORY (20080215S) Dataset was restored. 3001800300018 ENDBIB 16 0 3001800300019 NOCOMMON 0 0 3001800300020 DATA 3 1 3001800300021 EN DATA DATA-ERR 3001800300022 EV B B 3001800300023 .0253 98.9 0.3 3001800300024 ENDDATA 3 0 3001800300025 ENDSUBENT 24 0 3001800399999 ENDENTRY 3 0 3001899999999