ENTRY 21200 20060809 21782120000000001
SUBENT 21200001 20060809 21782120000100001
BIB 14 71 2120000100002
INSTITUTE (2UK NPL) 2120000100003
REFERENCE (J,JNE,25,557,197111) REVISED DATA USING NEW SOURCE 2120000100004
ENERGY. 2120000100005
(J,JNE/AB,20,249,196604) CONTAINS SUPERSEDED DATA AND 2120000100006
ALL EXPERIMENTAL DETAILS. 2120000100007
AUTHOR (T.B.RYVES,J.C.ROBERTSON,E.J.AXTON,I.GOODIER, 2120000100008
A.WILLIAMS) 2120000100009
TITLE -THE AU-197(N,G)AU-198 CROSS-SECTION AT 22.8 KEV- 2120000100010
FACILITY .NONE. 2120000100011
INC-SOURCE (PHOTO) SB-BE PHOTONEUTRON SOURCE MADE AT AWRE 2120000100012
CONSISTING OF SOLID SPHERE OF ANTIMONY 2120000100013
1.75 CM IN DIAMETER WITH A CLOSELY FITTING 2120000100014
BERYLLIUM SHELL 3.00+-0.02 MM THICK. 2120000100015
SOURCE STRENGTH (6.46+-0.04)E+05 N/SEC AT START2120000100016
OF IRRADIATIONS AND CALCULATED USING SB-124 2120000100017
HALF-LIFE OF 60.2+-0.3 D THEREAFTER. 2120000100018
SAMPLE .TWO MATCHED PAIRS OF THIN HEMISPHERICAL SHELLS, ONE 2120000100019
SET FITTING EXACTLY ROUND THE SOURCE, THE OTHER OF 2120000100020
RADIUS 10 CM. 2120000100021
.AFTER IRRADIATION BACKING WAS DISSOLVED AND GOLD 2120000100022
MELTED TO MAKE DISCS (0.75 INCH DIAMETER, 0.005 INCH 2120000100023
THICK, OR 1.5 INCH DIAMETER, 0.17 INCH THICK) FOR 2120000100024
GAMMA COUNTING AND FOILS (0.875 INCH DIAMETER, 0.001 2120000100025
INCH THICK) FOR BETA COUNTING. 2120000100026
METHOD (ACTIV) ACTIVATION. ONE WEEK IRRADIATIONS ON ROOF 2120000100027
OF NPL. 2120000100028
DETECTOR (PROPC) 4-PI BETA PROPORTIONAL COUNTER TO COUNT BETA 2120000100029
ACTIVITY OF THIN FOILS. DETECTOR CALIBRATED 2120000100030
BY RE-IRRADIATING THE FOILS IN A REACTOR AND 2120000100031
COUNTING IN A 4-PI BETA/GAMMA COINCIDENCE 2120000100032
ARRANGEMENT. 2120000100033
GAMMA SPECTROMETER TO MEASURE GAMMA ACTIVITY 2120000100034
OF THICK SAMPLES RELATIVE TO A VERY THIN HIGH 2120000100035
ACTIVITY AU-198 SAMPLE WHICH WAS ABSOLUTELY 2120000100036
CALIBRATED IN A 4-PI BETA/GAMMA COINCIDENCE 2120000100037
ARRANGEMENT. ALLOWANCE MADE FOR DIFFERENCES 2120000100038
IN SAMPLE GEOMETRIES. 2120000100039
PART-DET (B) DECAY BETAS. 2120000100040
(DG) DECAY GAMMAS. 2120000100041
CORRECTION .LARGE NUMBER OF CORRECTIONS INCLUDING- 2120000100042
INCREASE IN NEUTRON PATH LENGTH BY SCATTERING IN THE 2120000100043
GOLD (1.0 PERCENT FOR SMALL SHELL, 2.0 PC FOR LARGE). 2120000100044
SCATTERING IN COPPER BACKING (2.8 PC FOR BOTH SMALL 2120000100045
SHELLS, 11.8 AND 8.4 PC FOR LARGE). 2120000100046
ROOF SCATTERING BACKGROUND (NEGLIGIBLE FOR SMALL, 2120000100047
2.9 PERCENT FOR LARGE). 2120000100048
AIR-SCATTERING BACKGROUND (NEGLIGIBLE FOR SMALL, 2120000100049
0.5 PERCENT FOR LARGE). 2120000100050
SCATTERING IN ALUMINIUM CAN ROUND LARGE SHELLS 2120000100051
(0.5 PERCENT). 2120000100052
SMALL SHELLS AFFECTED BY CONTAMINATION FROM THE 2120000100053
SOURCE (3 PERCENT AND 0.7 PERCENT). 2120000100054
RESONANCE SELF-PROTECTION (LESS THAN 0.1 PERCENT). 2120000100055
NEUTRON COMPONENT OF ENERGY 380 KEV (3.3 PERCENT). 2120000100056
NO CORRECTION FOR COMPTON SCATTERING OF 1.69 MEV 2120000100057
GAMMAS IN THE SOURCE PRODUCING EXTRA NEUTRONS. 2120000100058
NO CORRECTION FOR INELASTIC SCATTERING OF SOURCE 2120000100059
NEUTRONS FROM 20 KEV SB LEVEL. 2120000100060
SMALL CORRECTION FOR SOURCE POSITIONING IN ONE CASE. 2120000100061
ERR-ANALYS .COMPREHENSIVE BREAKDOWN OF ERRORS FOR CORRECTIONS IN 2120000100062
TABLE 3 OF JNE,20,249,6604. 2120000100063
.FOR NEW DATA ERRORS ARE- 2120000100064
(ERR-S) RANDOM ERROR. 2120000100065
(ERR-1) SYSTEMATIC ERROR. 2120000100066
(ERR-T) TOTAL ERROR. 2120000100067
STATUS (NDD) FROM NEUDADA. 2120000100068
HISTORY (19791130T) 2120000100069
(19800110E) 2120000100070
(19810504A) 2120000100071
(19810722E) 2120000100072
(20060809A) DATE and two reference codes corrected 2120000100073
ENDBIB 71 0 2120000100074
NOCOMMON 0 0 2120000100075
ENDSUBENT 74 0 2120000199999
SUBENT 21200002 20060809 21782120000200001
BIB 3 10 2120000200002
REACTION (79-AU-197(N,G)79-AU-198,,SIG,,AV) 2120000200003
STATUS .DATA FROM TEXT OF PUBLICATION. 2120000200004
.OLD DATA WAS 640 MB +-7 MB RANDOM, +-18 MB 2120000200005
SYSTEMATIC. 2120000200006
HISTORY (19791130T) 2120000200007
(19800110E) 2120000200008
(19810504A) 2120000200009
(19810722E) 2120000200010
(19860808U)HH 2120000200011
(19860822E) 2120000200012
ENDBIB 10 0 2120000200013
NOCOMMON 0 0 2120000200014
DATA 5 1 2120000200015
EN DATA ERR-S ERR-1 ERR-T 2120000200016
KEV MB MB MB MB 2120000200017
2.2800E+01 6.8400E+02 5.0000E+00 1.2000E+01 1.3000E+01 2120000200018
ENDDATA 3 0 2120000200019
ENDSUBENT 18 0 2120000299999
ENDENTRY 2 0 2120099999999