ENTRY 20393 19840109 00002039300000001 SUBENT 20393001 19840109 00002039300100001 BIB 9 29 2039300100002 INSTITUTE (2ZZZGEL) 2039300100003 REFERENCE (J,ZP,238,23,7009) 2039300100004 AUTHOR (A.PAULSEN, R.WIDERA) 2039300100005 TITLE -THE (N,2N) EXCITATION FUNCTIONS FOR 41-NB-93 AND 2039300100006 45-RH-103 WITH SPECIAL RESPECT TO THE ISOMERIC STATES 2039300100007 IN 41-NB-92 AND 45-RH-102.- 2039300100008 FACILITY (VDG ) 3 MEV VAN DE GRAAFF OF THE CBNM. 2039300100009 INC-SOURCE (D-N15) N15(D,N)-REACTION AT E(D) = 1.8 MEV FOR E(N)2039300100010 FROM 10.26 TO 11.53 MEV. THE TARGET WAS 2 MILLIGR/CM2 2039300100011 OF SI(3)-N(4) (N15 ENRICHED). 2039300100012 (D-T ) T(D,N)-REACTION AT E(D) = 1.0 MEV FOR E(N) 2039300100013 FROM 12.61 TO 16.07 MEV USING THE TARGET OF 1 MILLIGR/2039300100014 CM2,AND AT E(D) = 3.0 MEV FOR E(N) FROM 16.18 TO 2039300100015 19.59 MEV USING THE TARGET OF 2.8 MILLIGR/CM2 TI-T. 2039300100016 SAMPLE .METALLIC SAMPLE OF 20 MM DIAMETER AND 5MM 2039300100017 THICKNESS. 2039300100018 DETECTOR (GELI ) TWO GE(LI) PLANAR DIODES OF THE ORDER OF 2039300100019 1 CM**3 VOLUME FOR ACTIVATION MEASUREMENT. 2039300100020 (TELES) PROTON RECOIL TELESCOPE COUNTER AT 0 DEG 2039300100021 RELATIVE TO THE DEUTERON BEAM WAS USED TO MEASURE THE 2039300100022 NEUTRON FLUX(ABSOLUTE). 2039300100023 .THE RELATIVE N-FLUX FOR SAMPLE WAS DEDUCED FROM 2039300100024 ANGULAR DISTRIBUTION MEASUREMENTS BY NEUTRON TOF 2039300100025 SPECTROMETER FOR (D-N15) REACTION AND BY A PROTON 2039300100026 RECOIL TELESCOPE COUNTER FOR (D-T) REACTION. 2039300100027 (SCIN ) A NE 102A PLASTIC SCINTILLATOR WITH AVP- 2039300100028 56/03 PHOTOMULTIPLIER FOR TOF EXPERIMENT. 2039300100029 HISTORY (701021C) 2039300100030 (741011E) 2039300100031 ENDBIB 29 0 2039300100032 NOCOMMON 0 0 2039300100033 ENDSUBENT 32 0 2039300199999 SUBENT 20393002 19840109 00002039300200001 BIB 9 33 2039300200002 REACTION (41-NB-93(N,2N)41-NB-92-M,,SIG) 2039300200003 METHOD (ACTIV) PHOTOPEAKS OF THE PULSE HEIGHT SPECTRA WERE 2039300200004 USED. 2039300200005 .RADIOACTIVITY OF 10.15 DAY(ISOMERIC STATE) WAS MEASUR-2039300200006 ED TO DETERMINE THE 41-NB-93(N,2N)41-NB-92-M1 2039300200007 CROSS-SECTION. 2039300200008 MONITOR .ABSOLUTE MEASUREMENT. 2039300200009 .THE NEUTRON FLUX WAS MEASURED BY PROTON RECOIL TELE- 2039300200010 SCOPE COUNTER. 2039300200011 .THE CALIBRATION SOURCES OF CO-58 AND NA-22 WERE USED 2039300200012 TO MEASURE THEIR ACTIVITIES WITH +- 1 PER CENT 2039300200013 ACCURACY. THE SOURCES CONSISTED OF AN ACTIVE FOIL OF 2039300200014 19 MM DIAMETER ENCLOSED IN A STAINLESS STEEL HAUSING 2039300200015 OF 20 MM DIAMETER AND 1 MM THICKNESS. 2039300200016 .THE CALIBRATION SOURCES WERE SANDWICHED BETWEEN TWO 2039300200017 DISKS OF 20 MM DIAMETER AND 2 MM THICKNESS OF STAIN- 2039300200018 LESS STEEL TO ADJUST THE GAMMA ABSORPTION COEFFICIENT 2039300200019 OF THE SOURCES TO THAT OF THE SAMPLE. 2039300200020 PART-DET (G ) 2039300200021 COMMENT .UP TO NOW NO RADIOACTIVE DECAY OF THE GROUND STATE OF 2039300200022 41-NB-92 COULD BE DETECTED.ALL EXISTING (N,2N) ACTIVA-2039300200023 TION MEASUREMENTS REPRESENT ONLY A PART OF THE (N,2N) 2039300200024 TOTAL CROSS SECTION. SEE H.B.CARTER, 66WASH P682. 2039300200025 STATUS .DATA FROM TABLE 1 OF Z.PHYSIK 238 P.27. 2039300200026 HISTORY (701021C) 2039300200027 (741011E) 2039300200028 CORRECTION .A CORRECTION FACTOR OF GAMMA-DETECTION WAS DETERMINED 2039300200029 FOR THE CENTER POSITION OF THE SOURCE BY VARYING ITS 2039300200030 POSITION IN DIFFERENT SANDWICHES. 2039300200031 ERR-ANALYS .THE TOTAL UNCERTAINTY IN PARTIAL CROSS-SECTION RANGES 2039300200032 FROM +- 5 TO 8 PER CENT. 2039300200033 .NEUTRON ENERGY SPREADS DUE TO TARGET THICKNESS AND 2039300200034 SAMPLE SOLID ANGLE ARE GIVEN. 2039300200035 ENDBIB 33 0 2039300200036 COMMON 1 3 2039300200037 HL 2039300200038 D 2039300200039 1.0150E+01 2039300200040 ENDCOMMON 3 0 2039300200041 DATA 4 32 2039300200042 EN EN-RSL DATA DATA-ERR 2039300200043 MEV MEV B PER-CENT 2039300200044 1.0260E+01 2.5000E-01 1.6700E-01 8.0000E+00 2039300200045 1.0430E+01 2.5000E-01 1.9500E-01 8.0000E+00 2039300200046 1.0630E+01 2.4000E-01 2.2900E-01 8.0000E+00 2039300200047 1.0850E+01 2.4000E-01 2.7000E-01 8.0000E+00 2039300200048 1.1080E+01 2.3000E-01 2.9100E-01 8.0000E+00 2039300200049 1.1280E+01 2.0000E-01 3.5700E-01 8.0000E+00 2039300200050 1.1440E+01 1.8000E-01 3.5000E-01 8.0000E+00 2039300200051 1.1530E+01 1.8000E-01 3.7000E-01 8.0000E+00 2039300200052 1.2630E+01 1.1000E-01 4.1500E-01 5.0000E+00 2039300200053 1.2810E+01 1.5000E-01 4.2000E-01 5.0000E+00 2039300200054 1.2980E+01 1.7000E-01 4.2500E-01 5.0000E+00 2039300200055 1.3240E+01 2.0000E-01 4.2800E-01 5.0000E+00 2039300200056 1.3460E+01 2.2000E-01 4.2000E-01 5.0000E+00 2039300200057 1.3790E+01 2.3000E-01 4.2800E-01 5.0000E+00 2039300200058 1.4050E+01 2.5000E-01 4.2300E-01 5.0000E+00 2039300200059 1.4420E+01 2.6000E-01 4.2200E-01 5.0000E+00 2039300200060 1.4710E+01 2.7000E-01 4.2100E-01 5.0000E+00 2039300200061 1.5090E+01 2.6000E-01 4.2000E-01 5.0000E+00 2039300200062 1.5370E+01 2.5000E-01 4.1200E-01 5.0000E+00 2039300200063 1.5720E+01 2.3000E-01 4.1300E-01 5.0000E+00 2039300200064 1.5990E+01 2.1000E-01 4.0600E-01 5.0000E+00 2039300200065 1.6250E+01 2.0000E-01 4.0300E-01 5.0000E+00 2039300200066 1.6420E+01 1.9000E-01 3.9500E-01 5.0000E+00 2039300200067 1.6610E+01 2.0000E-01 3.9600E-01 5.0000E+00 2039300200068 1.6750E+01 2.0000E-01 3.9900E-01 5.0000E+00 2039300200069 1.7270E+01 4.6000E-01 3.8600E-01 5.0000E+00 2039300200070 1.7750E+01 4.3000E-01 3.8500E-01 5.0000E+00 2039300200071 1.8330E+01 3.8000E-01 3.6500E-01 5.0000E+00 2039300200072 1.8710E+01 3.3000E-01 3.5700E-01 5.0000E+00 2039300200073 1.9130E+01 2.0000E-01 3.2900E-01 5.0000E+00 2039300200074 1.9360E+01 1.8000E-01 3.1800E-01 5.0000E+00 2039300200075 1.9590E+01 1.9000E-01 3.1000E-01 5.0000E+00 2039300200076 ENDDATA 34 0 2039300200077 ENDSUBENT 76 0 2039300299999 SUBENT 20393003 19840109 00002039300300001 BIB 9 39 2039300300002 REACTION (41-NB-93(N,2N)41-NB-92,,SIG) 2039300300003 METHOD (TOF ) FLIGHT PATH = 1.4 M. 2039300300004 .A PULSED ION BEAM OF 1 NS PULSE WIDTH AND 1 MHZ 2039300300005 REPETITION. 2039300300006 .OVERALL TIME RESOLUTION IS ABOUT 2.3 NS. 2039300300007 .EACH MEASUREMENT CONSISTS OF A LARGE NUMBER OF ALTER- 2039300300008 NATING SAMPLE IN AND SAMPLE OUT RUNS TO 2039300300009 SUBTRACT THE BACKGROUND. 2039300300010 .THE TOF SPECTRA CONTAINED ONLY VERY WEAK ELASTIC PEAKS2039300300011 BUT RELATIVE STRONG PROMPT GAMMA PEAKS WHICH WERE USED2039300300012 FOR THE TIME-TO-ENERGY TRANSFORMATION. 2039300300013 .TOF FLIGHT PATH OF 1.4 M FORMS AN ANGLE OF 90 DEG WITH2039300300014 THE DIRECTION OF THE INCOMING NEUTRONS. 2039300300015 .HEAVY LEAD SHIELD WAS USED BETWEEN TARGET AND DETECTOR2039300300016 ANALYSIS .THE OBTAINED N-SPECTRA FROM THE TOF MEASURE- 2039300300017 MENT WERE FITTED BY THE LEAST SQUARE METHOD TO F(E)2039300300018 = C*E*EXP(-E/T) ON BOTH CO AND NB SAMPLES, AS AN 2039300300019 APPROXIMATION TO A NUCLEAR EVAPORATION SPECTRUM. 2039300300020 .CROSS SECTION OF 27-CO-59(N,2N) OF 780 MB AT E(N)=16.82039300300021 MEV WAS USED. 2039300300022 MONITOR (27-CO-59(N,2N)27-CO-58,,SIG) 2039300300023 PART-DET (N ) 2039300300024 COMMENT .THE SMALL CONTRIBUTIONS FROM (N,N ) AND (N,PN) IN THE 2039300300025 TOTAL NB-93(N,2N) CROSS-SECTION ARE NOT SEVERE. 2039300300026 .PRESENT CROSS-SECTION VALUE AT 16.8 MEV WAS COMPARED 2039300300027 WITH THE ONLY EXISTING VALUE OF 1136 MB AT 14.7 MEV BY2039300300028 H.B.CARTER,66WASH P682. 2039300300029 .THE EXPERIMENTAL TOTAL (N,2N) CROSS-SECTION IS ABOUT 2039300300030 20 PER CENT SMALLER THAN THE THEORETICAL ONE FROM THE 2039300300031 STATISTICAL MODEL CALCULATION. THIS DISCREPANCY CAN BE2039300300032 EXPLAINED BY THE UNCERTAINTY OF THE LEVEL DENSITY 2039300300033 PARAMETERS A AND B . H.LISKIEN, A.PAULSEN,65ANTWERP2039300300034 119 AND EUR 2456 E (1965). 2039300300035 STATUS .DATA FROM P.28 OF Z.PHYSIK 238. 2039300300036 HISTORY (701021C) 2039300300037 (741011E) 2039300300038 ERR-ANALYS .IN COMPARISON OF THE N-YIELDS OF NB AND CO,THE SLIGHT-2039300300039 LY DIFFERENT NUCLEAR TEMPERATURES WERE TAKEN INTO 2039300300040 ACCOUNT WHICH GAVE RISE OF A 3 PER CENT CORRECTION. 2039300300041 ENDBIB 39 0 2039300300042 NOCOMMON 0 0 2039300300043 DATA 3 1 2039300300044 EN DATA DATA-ERR 2039300300045 MEV B PER-CENT 2039300300046 1.6800E+01 1.3800E+00 1.3000E+01 2039300300047 ENDDATA 3 0 2039300300048 ENDSUBENT 47 0 2039300399999 SUBENT 20393004 19840109 00002039300400001 BIB 9 31 2039300400002 REACTION (45-RH-103(N,2N)45-RH-102-M,,SIG) 2039300400003 METHOD (ACTIV) PHOTOPEAKS OF THE PULSE HEIGHT SPECTRA WERE 2039300400004 USED. 2039300400005 .RADIOACTIVITY OF 2.9 YEAR(ISOMERIC STATE) WAS MEASURED2039300400006 TO DETERMINE THE RH103(N,2N)RH102M CROSS-SECTION. 2039300400007 MONITOR .ABSOLUTE MEASUREMENT. 2039300400008 .THE NEUTRON FLUX WAS MEASURED BY PROTON RECOIL TELE- 2039300400009 SCOPE COUNTER. 2039300400010 .THE CALIBRATION SOURCES OF CO-58 AND NA-22 WERE USED 2039300400011 TO MEASURE THEIR ACTIVITIES WITH +- 1 PER CENT 2039300400012 ACCURACY. THE SOURCES CONSISTED OF AN ACTIVE FOIL OF 2039300400013 19 MM DIAMETER ENCLOSED IN A STAINLESS STEEL HAUSING 2039300400014 OF 20 MM DIAMETER AND 1 MM THICKNESS. 2039300400015 .THE CALIBRATION SOURCES WERE SANDWICHED BETWEEN TWO 2039300400016 DISKS OF 20 MM DIAMETER AND 2 MM THICKNESS OF AG TO 2039300400017 ADJUST THE GAMMA ABSORPTION COEFFICIENT OF THE SOURCES2039300400018 TO THAT OF THE SAMPLE. 2039300400019 PART-DET (G ) 2039300400020 COMMENT .BETWEEN TWO DIFFERENT HALF-LIFES FOR THE DECAY OF RH- 2039300400021 102,THE 2.9 YEAR ACTIVITY WAS ASCRIBED TO AN ISOMERIC 2039300400022 STATE. P.BORN ETAL, PHYSICA 29(1963)535, AND M.ADACHI2039300400023 ETAL.,J.PHYS.SOC.JAPAN 24(1968)227. 2039300400024 STATUS .DATA FROM TABLE 2 OF Z.PHYSIK 238 P.31. 2039300400025 HISTORY (701021C) 2039300400026 (741011E) 2039300400027 CORRECTION .A CORRECTION FACTOR OF GAMMA-DETECTION WAS DETERMINED 2039300400028 FOR THE CENTER POSITION OF THE SOURCE BY VARYING ITS 2039300400029 POSITION IN DIFFERENT SANDWICHES. 2039300400030 ERR-ANALYS .THE UNCERTAINTY IN THE PARTIAL CROSS-SECTION IS GIVEN.2039300400031 .NEUTRON ENERGY SPREADS DUE TO TARGET THICKNESS AND 2039300400032 SAMPLE SOLID ANGLE ARE GIVEN. 2039300400033 ENDBIB 31 0 2039300400034 COMMON 1 3 2039300400035 HL 2039300400036 YR 2039300400037 2.9000E+00 2039300400038 ENDCOMMON 3 0 2039300400039 DATA 4 26 2039300400040 EN EN-RSL DATA DATA-ERR 2039300400041 MEV MEV B PER-CENT 2039300400042 1.0630E+01 2.4000E-01 5.4000E-02 4.3500E+02 2039300400043 1.0860E+01 2.4000E-01 1.8700E-01 1.5300E+02 2039300400044 1.1080E+01 2.3000E-01 3.4200E-01 9.8000E+01 2039300400045 1.1280E+01 2.0000E-01 2.1700E-01 1.4400E+02 2039300400046 1.1430E+01 1.8000E-01 2.1200E-01 3.9000E+01 2039300400047 1.1530E+01 1.8000E-01 2.4000E-01 3.0000E+01 2039300400048 1.2610E+01 1.1000E-01 3.7600E-01 9.1000E+00 2039300400049 1.3050E+01 1.8000E-01 4.1500E-01 7.7000E+00 2039300400050 1.3390E+01 2.1000E-01 3.2100E-01 8.5000E+00 2039300400051 1.3810E+01 2.4000E-01 3.9000E-01 8.0000E+00 2039300400052 1.4200E+01 2.6000E-01 3.8300E-01 7.8000E+00 2039300400053 1.4610E+01 2.6000E-01 3.7900E-01 6.8000E+00 2039300400054 1.5030E+01 2.7000E-01 4.3100E-01 7.1000E+00 2039300400055 1.5400E+01 2.5000E-01 4.4500E-01 7.6000E+00 2039300400056 1.5820E+01 2.2000E-01 4.4000E-01 7.4000E+00 2039300400057 1.6070E+01 2.1000E-01 4.0200E-01 9.6000E+00 2039300400058 1.6180E+01 4.1000E-01 4.9200E-01 7.2000E+00 2039300400059 1.6590E+01 4.6000E-01 4.8300E-01 7.2000E+00 2039300400060 1.7100E+01 4.6000E-01 5.7300E-01 7.0000E+00 2039300400061 1.7590E+01 4.4000E-01 5.0500E-01 6.4000E+00 2039300400062 1.8050E+01 4.0000E-01 5.6100E-01 6.2000E+00 2039300400063 1.8470E+01 3.6000E-01 5.3600E-01 6.1000E+00 2039300400064 1.8830E+01 3.1000E-01 5.0000E-01 6.3000E+00 2039300400065 1.9130E+01 2.2000E-01 5.7800E-01 6.4000E+00 2039300400066 1.9360E+01 2.0000E-01 4.9600E-01 6.6000E+00 2039300400067 1.9590E+01 1.9000E-01 4.7000E-01 6.6000E+00 2039300400068 ENDDATA 28 0 2039300400069 ENDSUBENT 68 0 2039300499999 SUBENT 20393005 19840109 00002039300500001 BIB 9 31 2039300500002 REACTION (45-RH-103(N,2N)45-RH-102-G,,SIG) 2039300500003 METHOD (ACTIV) PHOTOPEAKS OF THE PULSE HEIGHT SPECTRA WERE 2039300500004 USED. 2039300500005 .RADIOACTIVITY OF 206 DAY (GROUND STATE) WAS MEASURED 2039300500006 TO DETERMINE THE RH103(N,2N)RH102G CROSS-SECTION. 2039300500007 MONITOR .ABSOLUTE MEASUREMENT. 2039300500008 .THE NEUTRON FLUX WAS MEASURED BY PROTON RECOIL TELE- 2039300500009 SCOPE COUNTER. 2039300500010 .THE CALIBRATION SOURCES OF CO-58 AND NA-22 WERE USED 2039300500011 TO MEASURE THEIR ACTIVITIES WITH +- 1 PER CENT 2039300500012 ACCURACY. THE SOURCES CONSISTED OF AN ACTIVE FOIL OF 2039300500013 19 MM DIAMETER ENCLOSED IN A STAINLESS STEEL HAUSING 2039300500014 OF 20 MM DIAMETER AND 1 MM THICKNESS. 2039300500015 .THE CALIBRATION SOURCES WERE SANDWICHED BETWEEN TWO 2039300500016 DISKS OF 20 MM DIAMETER AND 2 MM THICKNESS OF AG TO 2039300500017 ADJUST THE GAMMA ABSORPTION COEFFICIENT OF THE SOURCES2039300500018 TO THAT OF THE SAMPLE. 2039300500019 PART-DET (G ) 2039300500020 COMMENT .BETWEEN TWO DIFFERENT HALF-LIFES FOR THE DECAY OF RH- 2039300500021 102,THE 206 DAY ACTIVITY WAS ASCRIBED TO THE GROUND 2039300500022 STATE. K.HISATAKE, J.PHYS.SOC.JAPAN 16(1961)1280. 2039300500023 STATUS .DATA FROM TABLE 2 OF Z.PHYSIK 238 P.31. 2039300500024 HISTORY (701021C) 2039300500025 (741011E) 2039300500026 CORRECTION .A CORRECTION FACTOR OF GAMMA-DETECTION WAS DETERMINED 2039300500027 FOR THE CENTER POSITION OF THE SOURCE BY VARYING ITS 2039300500028 POSITION IN DIFFERENT SANDWICHES. 2039300500029 ERR-ANALYS .THE TOTAL UNCERTAINTY IN THE PARTIAL CROSS-SECTIONS IS2039300500030 GIVEN. 2039300500031 .NEUTRON ENERGY SPREADS DUE TO TARGET THICKNESS AND 2039300500032 SAMPLE SOLID ANGLE ARE GIVEN. 2039300500033 ENDBIB 31 0 2039300500034 COMMON 1 3 2039300500035 HL 2039300500036 D 2039300500037 2.0600E+02 2039300500038 ENDCOMMON 3 0 2039300500039 DATA 4 26 2039300500040 EN EN-RSL DATA DATA-ERR 2039300500041 MEV MEV B PER-CENT 2039300500042 1.0630E+01 2.4000E-01 2.5300E-01 2.0200E+01 2039300500043 1.0860E+01 2.4000E-01 3.4300E-01 1.8200E+01 2039300500044 1.1080E+01 2.3000E-01 3.6400E-01 1.2300E+01 2039300500045 1.1280E+01 2.0000E-01 3.5900E-01 8.4000E+00 2039300500046 1.1430E+01 1.8000E-01 3.9800E-01 7.5000E+00 2039300500047 1.1530E+01 1.8000E-01 4.2200E-01 7.3000E+00 2039300500048 1.2610E+01 1.1000E-01 5.3000E-01 7.4000E+00 2039300500049 1.3050E+01 1.8000E-01 5.9800E-01 7.2000E+00 2039300500050 1.3390E+01 2.1000E-01 5.9100E-01 7.2000E+00 2039300500051 1.3810E+01 2.4000E-01 5.8400E-01 7.2000E+00 2039300500052 1.4200E+01 2.6000E-01 5.6300E-01 7.2000E+00 2039300500053 1.4610E+01 2.6000E-01 5.4000E-01 7.1000E+00 2039300500054 1.5030E+01 2.7000E-01 5.5300E-01 7.2000E+00 2039300500055 1.5400E+01 2.5000E-01 5.5400E-01 7.2000E+00 2039300500056 1.5820E+01 2.2000E-01 5.5700E-01 7.2000E+00 2039300500057 1.6070E+01 2.1000E-01 5.7600E-01 7.1000E+00 2039300500058 1.6180E+01 4.1000E-01 5.6500E-01 7.3000E+00 2039300500059 1.6590E+01 4.6000E-01 5.8000E-01 7.1000E+00 2039300500060 1.7100E+01 4.6000E-01 5.7700E-01 7.2000E+00 2039300500061 1.7590E+01 4.4000E-01 5.3700E-01 7.2000E+00 2039300500062 1.8050E+01 4.0000E-01 5.7200E-01 7.1000E+00 2039300500063 1.8470E+01 3.6000E-01 5.3000E-01 7.1000E+00 2039300500064 1.8830E+01 3.1000E-01 5.5800E-01 7.1000E+00 2039300500065 1.9130E+01 2.2000E-01 5.2400E-01 7.2000E+00 2039300500066 1.9360E+01 2.0000E-01 4.9400E-01 7.2000E+00 2039300500067 1.9590E+01 1.9000E-01 4.5200E-01 7.2000E+00 2039300500068 ENDDATA 28 0 2039300500069 ENDSUBENT 68 0 2039300599999 SUBENT 20393006 19840109 00002039300600001 BIB 9 35 2039300600002 REACTION (45-RH-103(N,2N)45-RH-102,,SIG) 2039300600003 METHOD (ACTIV) PHOTOPEAKS OF THE PULSE HEIGHT SPECTRA WERE 2039300600004 USED. 2039300600005 .SUM OF (N,2N,,MS) AND (N,2N,,GND) FOR RH-102(N,2N) RE-2039300600006 ACTION. 2039300600007 MONITOR .ABSOLUTE MEASUREMENT. 2039300600008 .THE NEUTRON FLUX WAS MEASURED BY PROTON RECOIL TELE- 2039300600009 SCOPE COUNTER. 2039300600010 .THE CALIBRATION SOURCES OF CO-58 AND NA-22 WERE USED 2039300600011 TO MEASURE THEIR ACTIVITIES WITH +- 1 PER CENT 2039300600012 ACCURACY. THE SOURCES CONSISTED OF AN ACTIVE FOIL OF 2039300600013 19 MM DIAMETER ENCLOSED IN A STAINLESS STEEL HAUSING 2039300600014 OF 20 MM DIAMETER AND 1 MM THICKNESS. 2039300600015 .THE CALIBRATION SOURCES WERE SANDWICHED BETWEEN TWO 2039300600016 DISKS OF 20 MM DIAMETER AND 2 MM THICKNESS OF AG TO 2039300600017 ADJUST THE GAMMA ABSORPTION COEFFICIENT OF THE SOURCES2039300600018 TO THAT OF THE SAMPLE. 2039300600019 PART-DET (G ) 2039300600020 COMMENT .THE TOTAL EXPERIMENTAL (N,2N) CROSS-SECTION IS ABOUT 2039300600021 30 PER CENT SMALLER THAN THE THEORETICAL ONE FROM THE 2039300600022 STATISTICAL MODEL CALCULATION. THIS DISCREPANCY CAN BE2039300600023 EXPLAINED BY THE UNCERTAINTY OF THE LEVEL DENSITY 2039300600024 PARAMETERS A AND B . H.LISKIEN, A.PAULSEN,65ANTWERP2039300600025 119 AND EUR 2456 E (1965). 2039300600026 STATUS .DATA FROM TABLE 2 OF Z.PHYSIK 238 P.31. 2039300600027 HISTORY (701021C) 2039300600028 (741011E) 2039300600029 CORRECTION .A CORRECTION FACTOR OF GAMMA-DETECTION WAS DETERMINED 2039300600030 FOR THE CENTER POSITION OF THE SOURCE BY VARYING ITS 2039300600031 POSITION IN DIFFERENT SANDWICHES. 2039300600032 ERR-ANALYS .THE AVERAGE TOTAL UNCERTAINTY IN THE TOTAL CROSS- 2039300600033 SECTION INCLUDING THAT ONE OF THE DECAY SCHEME IS 2039300600034 ABOUT +- 8 PER CENT. 2039300600035 .NEUTRON ENERGY SPREADS DUE TO TARGET THICKNESS AND 2039300600036 SAMPLE SOLID ANGLE ARE GIVEN. 2039300600037 ENDBIB 35 0 2039300600038 NOCOMMON 0 0 2039300600039 DATA 4 26 2039300600040 EN EN-RSL DATA DATA-ERR 2039300600041 MEV MEV B PER-CENT 2039300600042 1.0630E+01 2.4000E-01 3.0700E-01 7.8300E+01 2039300600043 1.0860E+01 2.4000E-01 5.3000E-01 5.5200E+01 2039300600044 1.1080E+01 2.3000E-01 7.0600E-01 4.7700E+01 2039300600045 1.1280E+01 2.0000E-01 5.7600E-01 5.4600E+01 2039300600046 1.1430E+01 1.8000E-01 6.1000E-01 1.4300E+01 2039300600047 1.1530E+01 1.8000E-01 6.6200E-01 1.2100E+01 2039300600048 1.2610E+01 1.1000E-01 9.0600E-01 5.7000E+00 2039300600049 1.3050E+01 1.8000E-01 1.0140E+00 5.3000E+00 2039300600050 1.3390E+01 2.1000E-01 9.1300E-01 5.6000E+00 2039300600051 1.3810E+01 2.4000E-01 9.7400E-01 5.4000E+00 2039300600052 1.4200E+01 2.6000E-01 9.4600E-01 5.4000E+00 2039300600053 1.4610E+01 2.6000E-01 9.1900E-01 5.1000E+00 2039300600054 1.5030E+01 2.7000E-01 9.8400E-01 5.1000E+00 2039300600055 1.5400E+01 2.5000E-01 1.0000E+00 5.3000E+00 2039300600056 1.5820E+01 2.2000E-01 9.9700E-01 5.2000E+00 2039300600057 1.6070E+01 2.1000E-01 9.7800E-01 5.7000E+00 2039300600058 1.6180E+01 4.1000E-01 1.0570E+00 5.1000E+00 2039300600059 1.6590E+01 4.6000E-01 1.0630E+00 5.1000E+00 2039300600060 1.7100E+01 4.6000E-01 1.1500E+00 5.1000E+00 2039300600061 1.7590E+01 4.4000E-01 1.0420E+00 5.0000E+00 2039300600062 1.8050E+01 4.0000E-01 1.1330E+00 5.0000E+00 2039300600063 1.8470E+01 3.6000E-01 1.0660E+00 5.0000E+00 2039300600064 1.8830E+01 3.1000E-01 1.0580E+00 5.0000E+00 2039300600065 1.9130E+01 2.2000E-01 1.1030E+00 5.0000E+00 2039300600066 1.9360E+01 2.0000E-01 9.9100E-01 5.0000E+00 2039300600067 1.9590E+01 1.9000E-01 9.2200E-01 5.0000E+00 2039300600068 ENDDATA 28 0 2039300600069 ENDSUBENT 68 0 2039300699999 SUBENT 20393007 19840109 00002039300700001 BIB 7 10 2039300700002 REACTION (45-RH-103(N,3N)45-RH-101-M,,SIG) 2039300700003 METHOD (ACTIV) ACTIVATION METHOD. 2039300700004 HALF-LIFE ADDED BY COMPILER. 2039300700005 MONITOR .ABSOLUTE MEASUREMENT. 2039300700006 PART-DET (G ) 2039300700007 STATUS .DATA FROM TABLE 3 OF Z.PHYSIK 238 P.32. 2039300700008 HISTORY (701021C) 2039300700009 (741011E) 2039300700010 ERR-ANALYS .THE UNCERTAINTY IN PARTIAL CROSS-SECTION RANGES FROM 2039300700011 +- 5 TO 7 PER CENT. 2039300700012 ENDBIB 10 0 2039300700013 COMMON 1 3 2039300700014 HL 2039300700015 D 2039300700016 4.4000E+00 2039300700017 ENDCOMMON 3 0 2039300700018 DATA 4 6 2039300700019 EN EN-RSL DATA DATA-ERR 2039300700020 MEV MEV B PER-CENT 2039300700021 1.8050E+01 4.0000E-01 1.3700E-02 7.0000E+00 2039300700022 1.8470E+01 3.6000E-01 3.0000E-02 6.0000E+00 2039300700023 1.8830E+01 3.1000E-01 5.1000E-02 5.0000E+00 2039300700024 1.9130E+01 2.2000E-01 7.7400E-02 5.0000E+00 2039300700025 1.9360E+01 2.0000E-01 9.5600E-02 5.0000E+00 2039300700026 1.9590E+01 1.9000E-01 1.1800E-01 5.0000E+00 2039300700027 ENDDATA 8 0 2039300700028 ENDSUBENT 27 0 2039300799999 ENDENTRY 7 0 2039399999999