ENTRY 21577 19810408 00002157700000001 SUBENT 21577001 19810408 00002157700100001 BIB 12 38 2157700100002 INSTITUTE (2FR BOR) 2157700100003 REFERENCE (T,RUIZ,780712) 2157700100004 AUTHOR (R.RUIZ) 2157700100005 TITLE -STUDY OF THE REACTION NP-237(N,F) INDUCED BY 2157700100006 NEUTRONS IN THE ENERGY RANGE FROM 0.5 TO 1.75 MEV.- 2157700100007 (IN FRENCH).- 2157700100008 FACILITY (VDG,2FR GRA) 4 MV VAN DE GRAAFF. 2157700100009 INC-SOURCE (P-LI7) 2.2-3.44 MEV PROTONS IMPINGING ONTO A 2157700100010 250 MICRO-GRAMS/CM*CM LI-F DEPOSIT. THIS DEPOSIT 2157700100011 WAS PRODUCED BY EVAPORATION IN VACUUM ONTO A 2157700100012 TANTALUM BACKING OF 0.5 MM THICKNESS. THE 2157700100013 AVERAGE BEAM CURRENT IS 50 MICRO-AMPERE AT 4 MEV. 2157700100014 THE NEUTRON ENERGY SPREAD IS 30 KEV AT 500 KEV. 2157700100015 SAMPLE .NP-HYDROXYDE, 1 CM*CM AREA, 107 MICRO-GRAMS/CM*CM, 2157700100016 ON VYNSBACKING OF 50 MICRO-GRAMS/CM*CM, COATED 2157700100017 WITH A THIN GOLD LAYER OF 20 MICRO-GRAMS/CM*CM. 2157700100018 .U-235 SAMPLE TO CHECK THE MEASUREMENT. 97 PERCENT 2157700100019 ENRICHED UF4, 1 CM*CM AREA, 5 MICROGRAMS/CM*CM 2157700100020 THICK, ON A VYNSBACKING OF 20 MICRO-GRAMS/CM*CM, 2157700100021 COATED WITH A GOLD LAYER OF 20 MICRO-GRAMS/CM*CM. 2157700100022 .BOTH SAMPLES PREPARED AT CBNM-GEEL. 2157700100023 .A CF-252 SOURCE FOR THE ENERGY CALIBRATION OF THE 2157700100024 DETECTORS (SMITH-PROCEDURE). 1.6E+4 FIS/MIN IN 4*PI, 2157700100025 8.6E+3 ALPHAS/SEC IN 4*PI. PREPARED AT CENBG BY 2157700100026 SELFTRANSFER ON A TANTALUM BACKING, AREA 1 CM*CM. 2157700100027 METHOD (TOF ) THE FISSION FRAGMENT ENERGIES ARE 2157700100028 MEASURED TOGHETHER WITH THE DIFFERENCE OF THEIR 2157700100029 TIME OF FLIGHT FROM SAMPLE TO DETECTOR. THIS 2157700100030 TOF-DIFFERENCE IS USED TO DISCRIMINATE AGAINST 2157700100031 SPURIOUS EVENTS, USING A 2157700100032 (COINC) COINCIDENCE METHOD. 2157700100033 DETECTOR (SOLST) ORTEC SURFACE BARRIERS BF-35-300-60, 2157700100034 300 MM*MM SENSITIVE AREA, 60 MICROMETER 2157700100035 OF SILICON, WINDOW THICKNESS 40 MICRO-GRAMS/CM*CM. 2157700100036 STATUS .TEXT, THESIS. 2157700100037 HISTORY (800612C) G.C. 2157700100038 (800718E) 2157700100039 ERR-ANALYS .NO DETAILS GIVEN. 2157700100040 ENDBIB 38 0 2157700100041 NOCOMMON 0 0 2157700100042 ENDSUBENT 41 0 2157700199999 SUBENT 21577002 19800718 00002157700200001 BIB 3 4 2157700200002 REACTION (93-NP-237(N,F),,AKE,FF) 2157700200003 STATUS .TABLE 3-3, PAG. 99, THESIS. 2157700200004 HISTORY (800612C) G.C. 2157700200005 (800718E) 2157700200006 ENDBIB 4 0 2157700200007 COMMON 1 3 2157700200008 DATA-ERR 2157700200009 MEV 2157700200010 3.0000E-01 2157700200011 ENDCOMMON 3 0 2157700200012 DATA 2 8 2157700200013 EN DATA 2157700200014 MEV MEV 2157700200015 5.0000E-01 1.6690E+02 2157700200016 7.5000E-01 1.6750E+02 2157700200017 7.5000E-01 1.6740E+02 2157700200018 7.5000E-01 1.6690E+02 2157700200019 1.0000E+00 1.6850E+02 2157700200020 1.2500E+00 1.6770E+02 2157700200021 1.5000E+00 1.6810E+02 2157700200022 1.7500E+00 1.6720E+02 2157700200023 ENDDATA 10 0 2157700200024 ENDSUBENT 23 0 2157700299999 ENDENTRY 2 0 2157799999999