ENTRY 21789 19830111 00002178900000001 SUBENT 21789001 19830111 00002178900100001 BIB 14 37 2178900100002 INSTITUTE (2SWDUPP) 2178900100003 REFERENCE (J,PM,46,295,55) 2178900100004 (J,PM,44,95,53) RESULTS AT 169 MEV,TAYLOR+. 2178900100005 AUTHOR (R.ALPHONCE, A.JOHANSSON, A.E.TAYLOR, G.TIBELL) 2178900100006 TITLE --NEUTRON ATTENUATION MEASUREMENTS IN HEAVY AND LIGHT 2178900100007 WATER AT ENERGIES BETWEEN 109 AND 169 MEV.- 2178900100008 FACILITY (SYNCY,2SWDUPP) 230 CM UPPSALA SYNCHROCYCLOTRON. 2178900100009 INC-SOURCE (P-BE ) 30 MM THICK BE TARGET. 2178900100010 SAMPLE .LIGHT AND HEAVY WATER SAMPLES 2178900100011 .IN CU - TUBES WITH 0.5 MM THICK CU - WINDOWS. 2178900100012 .SAMPLES CONTAINED THE SAME NUMBER OF O - ATOMS. 2178900100013 .HEAVY WATER CONSISTED OF 99.75 PERCENT D-2-O. 2178900100014 METHOD (REC,COINC) 2178900100015 .RECOIL PROTONS EMERGING FROM A POLYTHENE SCATTERER 2178900100016 WERE DETECTED BY A TRIPLE COINCIDENCE COUNTER 2178900100017 TELESCOPE. 2178900100018 .AN AL-ABSORBER WAS PLACED BETWEEN THE TWO LAST 2178900100019 DETECTORS TO SET A LOW ENERGY LIMIT TO THE 2178900100020 RECOIL PROTONS DETECTED. 2178900100021 DETECTOR (SCIN ) COUNTER TELESCOPE CONSISTING OF 2178900100022 3 POLYSTYRENE CRYSTALS, EACH 7 MM THICK, 2178900100023 MOUNTED ON TOP OF A PHOTOMULTIPLIER TUBE. 2178900100024 (BF3 ) BF3 DETECTOR TO MONITOR THE NEUTRON BEAM. 2178900100025 ANALYSIS .AN EFFECTIVE NEUTRON ENERGY WAS CALCULATED. 2178900100026 .THE ENERGY BAND WIDTH VARIED BETWEEN 19 AND 2178900100027 31 MEV DEPENDING ON THE ABSORBER THICKNESS IN 2178900100028 THE DETECTOR TELESCOPE. 2178900100029 PART-DET (P ) 2178900100030 .RECOIL PROTONS FROM A 17MM THICK POLYTHENE SCATTERER. 2178900100031 STATUS .DATA TAKEN FROM THE REFERENCE. 2178900100032 HISTORY (820814C) B.N. 2178900100033 (830111E) 2178900100034 CORRECTION .THE PROTON COUNTING RATE WAS CORRECTED TO A 2178900100035 CONTRIBUTION FROM THE CARBON CONTENT IN THE 2178900100036 POLYTHENE FOIL. 2178900100037 .THIS CONTRIBUTION WAS BETWEEN 8 AND 12 PERCENT 2178900100038 DEPENDING ON THE NEUTRON ENERGY. 2178900100039 ENDBIB 37 0 2178900100040 NOCOMMON 0 0 2178900100041 ENDSUBENT 40 0 2178900199999 SUBENT 21789002 19830111 00002178900200001 BIB 4 8 2178900200002 REACTION ((1-H-2(N,TOT),,SIG)-(1-H-1(N,TOT),,SIG)) 2178900200003 STATUS .DATA TAKEN FROM REFERENCE. 2178900200004 HISTORY (820814C) B.N. 2178900200005 (830111E) 2178900200006 ERR-ANALYS .THE CROSS SECTION DIFFERENCE IS GIVEN WITH AN 2178900200007 ACCURACY OF 10 PERCENT,WHICH REPRESENTS ONLY THE 2178900200008 STATISTICAL ERROR . NO DETAILED INFORMATION 2178900200009 ABOUT SYSTEMATIC ERRORS IS GIVEN. 2178900200010 ENDBIB 8 0 2178900200011 NOCOMMON 0 0 2178900200012 DATA 4 5 2178900200013 EN-MEAN EN-ERR DATA DATA-ERR 2178900200014 MEV MEV MB MB 2178900200015 1.0900E+02 2.0000E+00 2.9100E+01 3.6000E+00 2178900200016 1.1700E+02 2.0000E+00 2.7200E+01 2.4000E+00 2178900200017 1.3200E+02 2.0000E+00 2.5300E+01 2.4000E+00 2178900200018 1.4900E+02 2.0000E+00 2.4800E+01 2.0000E+00 2178900200019 1.6900E+02 3.0000E+00 2.3100E+01 2.0000E+00 2178900200020 ENDDATA 7 0 2178900200021 ENDSUBENT 20 0 2178900299999 SUBENT 21789003 19830111 00002178900300001 BIB 5 9 2178900300002 REACTION (8-O-16(N,TOT),,SIG) 2178900300003 ASSUMED (ASSUM,1-H-1(N,TOT),,SIG) 2178900300004 HYDROGEN CROSS SECTION USED IN DERIVING THE 2178900300005 OXYGEN CROSS SECTION FROM THE ATTENUATION 2178900300006 MEASUREMENTS IN LIGHT WATER. 2178900300007 STATUS .DATA TAKEN FROM REFERENCE. 2178900300008 HISTORY (820814C) B.N. 2178900300009 (830111E) 2178900300010 CORRECTION .FOR THE COPPER END WINDOW 2178900300011 ENDBIB 9 0 2178900300012 NOCOMMON 0 0 2178900300013 DATA 6 5 2178900300014 EN-MEAN EN-ERR DATA DATA-ERR ASSUM ASSUM-ERR 2178900300015 MEV MEV MB MB MB MB 2178900300016 1.0900E+02 2.0000E+00 6.5600E+02 6.0000E+00 6.4000E+01 2.0000E+002178900300017 1.1700E+02 2.0000E+00 5.9800E+02 6.0000E+00 5.9000E+01 2.0000E+002178900300018 1.3200E+02 2.0000E+00 5.1800E+02 6.0000E+00 5.4000E+01 2.0000E+002178900300019 1.4900E+02 2.0000E+00 4.7300E+02 6.0000E+00 5.0000E+01 2.0000E+002178900300020 1.6300E+02 3.0000E+00 4.3100E+02 6.0000E+00 4.8000E+01 2.0000E+002178900300021 ENDDATA 7 0 2178900300022 ENDSUBENT 21 0 2178900399999 ENDENTRY 3 0 2178999999999