ENTRY 21536 19810205 00002153600000001
SUBENT 21536001 19810205 00002153600100001
BIB 16 65 2153600100002
INSTITUTE (2BLGLVN) LOUVAIN-LA-NEUVE. 2153600100003
REFERENCE (J,PL/B,82,2,212,790326) FINAL REPORT. 2153600100004
(C,78GRAZ,1,54,7808) PRELIMINARY RESULTS. ABSTRACT. 2153600100005
AUTHOR (M.BOSMAN,A.BOL,J.F.GILOT,P.LELEUX,P.LIPNIK, 2153600100006
P.MACQ) 2153600100007
TITLE -MEASUREMENT OF THE TOTAL CROSS SECTION FOR THE 2153600100008
H-1(N,G)H-2 REACTION BETWEEN 37 AND 72 MEV.- 2153600100009
FACILITY (CYCLO,2BLGLVN) SYNCHRONOUS CYCLOTRON CYCLONE OF 2153600100010
LOUVAIN-LA-NEUVE. 2153600100011
INC-SOURCE (P-LI7) 3 MICRO-AMPERE PROTON BEAMS OF 40, 50, 55, 2153600100012
60, 65 AND 75 MEV IMPINGING ON 4 MM THICK LI-TARGET. 2153600100013
SAMPLE .LIQUID H(2) TARGET, 4.5 MM OR 6.5 MM THICK, 4 CM 2153600100014
DIAM, 3 M DOWNSTREAM THE NEUTRON PRODUCTION TARGET. 2153600100015
ITS VACUUM JACKET HAS HAVAR WINDOWS OF 5 MG/CM*CM 2153600100016
AND 10 MG/CM*CM RESPECTIVILY. 2153600100017
METHOD (TOF ) TIME-OF-FLIGHT MEASURED BETWEEN BEAM PICK-OFF 2153600100018
AND DETECTOR S1, BETWEEN S1 AND S2, AND BETWEEN S1 2153600100019
AND S5. 2153600100020
(COINC) FAST PROTONS ARE DETECTED BY A COINCIDENCE 2153600100021
PC1(-),PC2(+),S1(+),S2(+),S3(+),S4(-),S5(+), WHERE 2153600100022
+ MEANS SIGNAL AND - MEANS NO SIGNAL. DEUTERONS AND 2153600100023
SLOW PROTONS ARE DETECTED BY PC1(-),PC2(+),S1(+), 2153600100024
S2(+),S3(-). THESE 2 KINDS OF COINCIDENCES TRIGGER 2153600100025
THE RECORDING OF AN EVENT, WHICH IS THEN STORED ON 2153600100026
MAGNETIC TAPE WITH THE PARAMETERS IS (1) THE KIND OF 2153600100027
COINCIDENCE, (2) THE PULSE HEIGHTS FROM PC1, PC2, 2153600100028
S1,S2,S3,S4,S5, AND (3) THE TIME-OF-FLIGHTS MENTIONED 2153600100029
ABOVE. 2153600100030
DETECTOR (PROPC) TWO PROPORTIONAL COUNTERS ARE USED : PC1, PC2. 2153600100031
PC1 - GAS PROPORTIONAL COUNTER IN FRONT OF THE LIQUID 2153600100032
HYDROGEN TARGET TO REJECT CHARGED PARTICLES 2153600100033
CONTAMINATING THE NEUTRON BEAM (ABOUT 1.E-4). 2153600100034
FILLED WITH ISOBUTANE-METHYLAL-ARGON MIXTURE, 2153600100035
5 MG/CM*CM HAVAR-WINDOWS. 2153600100036
PC2 - GAS PROPORTIONAL COUNTER BEHIND THE H(2)- 2153600100037
TARGET, 2 CM THICK, TRIGGERS ON CHARGED 2153600100038
PARTICLES FROM THE TARGET REGION, FILLED WITH 2153600100039
SAME GAS AS PC1, 2.7 MG/CM*CM AL-WINDOWS. 2153600100040
(SCIN ) FIVE SCINTILLATION COUNTERS : S1,S2,S3,S4,S5. 2153600100041
S1 - DE-COUNTER JUST BEHIND PC2. 0.1 OR 0.5 MM THIN. 2153600100042
S2 - E-COUNTER, THICKNESS ADJUSTED TO MAXIMUM RANGE 2153600100043
OF THE DEUTERONS, COVERING THE HOLE LABORATORY 2153600100044
ANGLE OF DEUTERON EMISSION ( 7. DEGREES). 2153600100045
S3 - SLIGHTLY LARGER THAN S2 AND JUST BEHIND IT. 2153600100046
S4 - BEHIND S3 AT A LAB-ANGLE OF 3.3 DEGREES, WITH A 2153600100047
3 CM DIAM HOLE IN IT, DEFINING THE SOLID ANGLE 2153600100048
OF S5 JUST BEHIND IT. 2153600100049
S5 - 5 CM THICK, 5 CM DIAM. 2153600100050
MONITOR (1-H-1(N,EL)1-H-1,,DA) ELASTICALLY SCATTERED PROTONS 2153600100051
AT 3.3 DEGREES LAB-ANGLE, I.E. 173. DEGR. CMS-ANGLE. 2153600100052
ONLY KNOWN WITH A PRECISION OF ABOUT 5 PERC AND SO 2153600100053
THE MAIN SOURCE OF ERROR OF THE MEASUREMENTS. 2153600100054
PART-DET (D ) 2153600100055
COMMENT .MEASUREMENTS SHOW THAT THERE IS NO DISCREPANCY 2153600100056
BETWEEN EXPERIMENT AND THEORY IN THIS ENERGY 2153600100057
REGION. DEUTERON PHOTO-DISINTIGRATION CROSS SECTIONS 2153600100058
ARE CALCULATED FROM THE CAPTURE DATA. 2153600100059
STATUS .DATA TAKEN FROM MAIN REFERENCE. 2153600100060
HISTORY (800430C) G.C. 2153600100061
(800603E) 2153600100062
CORRECTION .BACKGROUND CORRECTION BY SUBSTRACTION OF DUMMY 2153600100063
SAMPLE MEASUREMENT. 2153600100064
ERR-ANALYS .ERROR-BARS REPRESENT THE CONSISTENCY ERROR TAKEN 2153600100065
OVER SUCCESSIVE PAIRS OF MEASUREMENTS WITH H(2) 2153600100066
AND DUMMY TARGET. 2153600100067
ENDBIB 65 0 2153600100068
COMMON 1 3 2153600100069
MONIT-ERR 2153600100070
PER-CENT 2153600100071
5.0000E+00 2153600100072
ENDCOMMON 3 0 2153600100073
ENDSUBENT 72 0 2153600199999
SUBENT 21536002 19800603 00002153600200001
BIB 3 4 2153600200002
REACTION (1-H-1(N,G)1-H-2,,SIG) 2153600200003
STATUS .TABLE 1 OF MAIN REFERENCE. 2153600200004
HISTORY (800430C) G.C. 2153600200005
(800603E) 2153600200006
ENDBIB 4 0 2153600200007
NOCOMMON 0 0 2153600200008
DATA 5 7 2153600200009
EN EN-RSL MONIT DATA DATA-ERR 2153600200010
MEV MEV MB/SR MB MB 2153600200011
3.7000E+01 1.4000E+00 2.3200E+01 2.1200E-02 1.6000E-03 2153600200012
4.2200E+01 1.3000E+00 2.0400E+01 2.0600E-02 1.4000E-03 2153600200013
4.7300E+01 1.2000E+00 1.8200E+01 1.7000E-02 7.0000E-04 2153600200014
5.2400E+01 1.1000E+00 1.6700E+01 1.7600E-02 9.0000E-04 2153600200015
5.7400E+01 1.0000E+00 1.5400E+01 1.5800E-02 1.1000E-03 2153600200016
6.2500E+01 1.0000E+00 1.4400E+01 1.4600E-02 1.1000E-03 2153600200017
7.2600E+01 9.0000E-01 1.2800E+01 1.4700E-02 1.1000E-03 2153600200018
ENDDATA 9 0 2153600200019
ENDSUBENT 18 0 2153600299999
ENDENTRY 2 0 2153699999999