SUBENT        30322001     940927   20050616   20050926       0000
BIB                 18         63
TITLE      CROSS-SECTIONS OF 14 MEV NEUTRON REACTIONS PRODUCING
           SHORT-LIVED NUCLIDES.
AUTHOR     (J.JANCZYSZYN,L.GORSKI)
INSTITUTE  (3POLITJ)
REFERENCE  (J,JRC,14,201,73)
           (J,CA,17,(3),703,72)EXP.DETAIL.
           (J,RRL,8,363,7112) BRIEF DESCRIPTION OF EXPERIMENT.
MONITOR    (29-CU-63(N,2N)29-CU-62,,SIG)
           NEUTRON FLUX WAS DETERMINED ON THE BASIS OF THE 'TEXAS
           CONVENTION',R.L.HEATH,PROC.INTERN.CONF.MODERN TRENDS IN
           ACTIVATION ANALYSIS,COLLEGE STATION,TEXAS,1965,P.389.
           *SPECIFICATION OF TEXAS CONVENTION,
            THE EFFECTIVE FLUXES FOR SAMPLE ACTIVATIONS ARE TO BE
            MEASURED BY EXPOSING HIGH-PURITY COPPER DISKS OF 0.25-
            MM THICKNESS AND 1-CM AND/OR 2.5-CM DIA FOR 1 MIN TO
            THE N-FLUX TO BE MEASURED. ----AND THE DISINTEGRATION
            RATE OF CU-62 ACTIVITY IS DETERMINED. THEN THE FLUX IS
            GIVEN IN DISINT./MIN/(GRAM OF COPPER).
FACILITY   (CCW) NEUTRON GENERATOR. IN ORDER TO OBTAIN THE IRRADI-
           ATION TIMES 0.1 TO 1 SEC. A DEFLECTING ELECTRODE WAS
           PLACED IN THE GENERATOR TUBE.
INC-SOURCE (D-T) T(D,N)HE REACTION.
INC-SPECT  14 MEV NEUTRONS, FLUX WAS 5.E+7 TO 2.E+8 N/CM2/SEC.
METHOD     (ACTIV) CYCLIC NEUTRON ACTIVATION METHOD WITH THE 0.2-
           SECOND FAST PNEUMATIC TUBE SYSTEM (MEAN VELOCITY,30M/S)
           EACH SAMPLE WAS IRRADIATED FOR 3 HALF-LIVES OF THE
           INVESTIGATED NUCLIDE. AND THE COUNTING TIME WAS EQUAL
           TO THE IRRADIATION,UNLESS THE SHORTENING OF THE FORMER
           WAS NECESSARY TO AVOID THE 'LONG-LIVED' NUCLIDE DECAY.
           AFTER A PAUSE OF 5 TO 10 HALF-LIVES OF NUCLIDE, A 2ND
           MEASUREMENT WITH THE SAME COUNTING TIME AS THE 1ST ONE
           WAS FOLLOWED.
DETECTOR   (NAICR) NAI(TL) 3 * 3INCH, WITH A 400-CHANNEL ANALYSER
           VICTOREEN ST 400 DM.
           (SCIN) SCINTILLATION COUNTER, HORNYAK NE 450, WITH A
           PHOTOMULTILIER EMI6097F FOR NEUTRON MONITORING.
PART-DET   (DG,B+) DECAY GAMMAS OR DECAY BETA+.
CORRECTION THE DEAD TIME OF THE MULTICHANNEL ANALYSER WAS CORRECT-
           ED.
ANALYSIS   WHEN THE SAME ISOMER ARISES FROM TWO DIFFERENT ISTOPES
           OF THE SAME ELEMENTS AS A RESULT OF THE (N,N') AND
            (N,2N) REACTIONS, THE WEIGHED MEAN CROSS-SECTION WAS
           CALCULATED, TAKING ISOTOPIC ABUNDANCES AS WEIGHTS.
HALF-LIFE  MAINLY TAKEN FROM THE TABLE OF ISOTOPES,LEDERER ET AL.,
           6TH ED.,1967.
ERR-ANALYS TOTAL ERROR IS GIVEN.  THE LARGE ERRORS FOR SOME OF
           CROSS-SECTIONS MAY PARTIALLY BE DUE TO INSTRUMENTAL
           IMPERFECTIONS AND TO THE FACT THAT THE CROSS-SECTION
           WAS NOT THE MAIN PURPOSE OF THIS FACILITY OF AUTOMATIC
           ACTIVATION ANALYSIS.
COMMENT    IN A FEW CASES THE CONVERSION COEFFICIENT IS NOT
           KNOWN, AND IS ASSUMED TO BE 0 WITH THE NUMBER OF
           QUANTA PER DISINTEGRATION TO BE 1.
STATUS     FROM TABLE 1 OF J.RADIOANAL.CHEM.,14(1973)201.
           (APRVD) APPROVED BY JANCZYCZYN WITH NOTES, 29/04/76.
HISTORY    (760203C) KO.
           (760519A) KO. -ADD 'APRVD',INF.ON HALF-LIFE OF IN-114M2
            AND AUTHOR'S CORRECTION OF CE-140(N,2N) X-SECTION.-
           (900130A)VOF.-ISO-QUANT CHANGED TO REACTION FORMALISM
                          STANDARD CHANGED TO MONITOR FORMALISM
                          RESID-NUC DELETED.
           (930224U) HW.-MISPUNCH IN BIB SECTION CORRECTED.-
           (940705U) HW.-REACTION CODE ALTERED IN SAN 021.-
ENDBIB              63
COMMON               1          3
EN
MEV
14.
ENDCOMMON            3
ENDSUBENT           70
SUBENT        30322017     900212   20050616   20050926       0000
BIB                  2          2
REACTION   (74-W-0(N,X)74-W-183-M,,SIG)
HALF-LIFE  (HL,74-W-183-M1) = 5.3 SEC.
ENDBIB               2
NOCOMMON             0          0
DATA                 3          1
DATA       DATA-ERR   HL
MB         MB         SEC
520.       130.       5.3
ENDDATA              3
ENDSUBENT           10