ENTRY 22230 19930329 00002223000000001 SUBENT 22230001 19930329 00002223000100001 BIB 10 16 2223000100002 REFERENCE (J,NP/A,526,265,91) 2223000100003 TITLE -NUCLEON CAPTURE BY 3HE AND THE PRODUCTION OF SOLAR 2223000100004 HEP-NEUTRINOS - CROSS SECTIONS AND SHELL-MODEL CAL- 2223000100005 CULATIONS. 2223000100006 AUTHOR (R.WERVELMAN,K.ABRAHAMS,H.POSTMA,J.G.L.BOOTEN, 2223000100007 A.G.M.VAN HEES) 2223000100008 INSTITUTE (2NEDRCN) R.W., K.A. AND EXPERIMENTAL SITE. 2223000100009 (2NEDDEL) H.P. 2223000100010 (2NEDUTR) J.G.L.B. AND A.G.M.V H. 2223000100011 FACILITY (REAC ) THE HIGH FLUX REACTOR IN PETTEN. 2223000100012 METHOD (GSPEC) 2223000100013 PART-DET (G ) 2223000100014 ERR-ANALYS (DATA-ERR) 2223000100015 STATUS .DATA TAKEN FROM MAIN REF. 2223000100016 HISTORY (921219C) N.O. 2223000100017 (930329E) 2223000100018 ENDBIB 16 0 2223000100019 NOCOMMON 0 0 2223000100020 ENDSUBENT 19 0 2223000199999 SUBENT 22230002 19930329 00002223000200001 BIB 8 29 2223000200002 REACTION (2-HE-3(N,G)2-HE-4,,SIG,,MXW) 2223000200003 INC-SOURCE (REAC ) THE HORIZONTAL BEAM-TUBE HB11, WHICH HAS A SYS-2223000200004 TEM OF FOCUSING NEUTRON MIRRORS NEAR THE REACTOR CORE,2223000200005 WAS USED. TRANSMISSION OF NEUTRONS CAN ONLY TAKE PLACE2223000200006 BY TOTAL REFLECTION AT THE NICKEL MIRROR SURFACES, 2223000200007 WHICH THUS ACT AS A LOW-PASS NEUTRON FILTER. THE 6 CM 2223000200008 DIAMETER NEUTRON BEAM WAS SHAPED WITH AN ADDITIONAL 2223000200009 BORON PLASTIC AND LIF DIAPHRAGM NEAR THE TARGET. 2223000200010 INC-SPECT .THE NEUTRON SPECTRUM EAS DETERMINED BY IRRADIATING TWO2223000200011 STACKS OF TWENTY 400 MG/CM2 THICK 2.5 X 2.5 CM2 GOLD 2223000200012 FOILS, ONE BEFORE AND ONE AFTER THE TARGET GAS CELL. 2223000200013 DETECTOR (NAICR) THE 20.5 MEV CAPTURE GAMMA RAYS WERE DETECTED 2223000200014 BY TWO 25 CM DIAMETER BY 25 CM LONG NAI-TL DETECTORS, 2223000200015 BOTH PLACED 32.6 CM FROM THE TARGET CELL AND AT 90 2223000200016 DEGREES WITH RESPECT TO THE NEUTRON BEAM. THE DETEC- 2223000200017 TORS WERE SHIELDED AGAINST SCATTERED NEUTRONS AND 2223000200018 GAMMA-RAYS NOT ORIGINATING FROM THE TARGET. THE RES- 2223000200019 PONSE FUNCTION WAS CALCULATED WITH A MONTE CARLO CODE.2223000200020 SAMPLE .THE TARGET CELL CONSISTED OF AN ALUMINUM CYLINDRICAL 2223000200021 CONTAINER, 9 CM IN LENGTH AND 8 CM IN DIAMETER, WITH 2223000200022 40 MICROMETER THICK ARAMID FOILS AS ENTRANCE AND EXIT 2223000200023 WINDOWS. THE TARGET GAS WAS HIGH PURITY, RESEARCH 2223000200024 GRADE HELIUM-3 GAS. THE GAS PRESSURE WAS 700-750 TORR.2223000200025 MONITOR (79-AU-197(N,G)79-AU-198-G,,SIG) THE NEUTRON FLUX WAS 2223000200026 DETERMINED BY IRRADIATION OF 100 MG/CM2 THICK GOLD 2223000200027 FOILS. 2223000200028 STATUS .DATA TAKEN FROM MAIN REF. 2223000200029 HISTORY (921219C) N.O. 2223000200030 (930329E) 2223000200031 ENDBIB 29 0 2223000200032 COMMON 2 3 2223000200033 MONIT MONIT-ERR 2223000200034 B B 2223000200035 9.8650E+01 9.0000E-02 2223000200036 ENDCOMMON 3 0 2223000200037 DATA 3 1 2223000200038 EN-DUMMY DATA DATA-ERR 2223000200039 EV MICRO-B MICRO-B 2223000200040 2.5300E-02 5.5000E+01 3.0000E+00 2223000200041 ENDDATA 3 0 2223000200042 ENDSUBENT 41 0 2223000299999 SUBENT 22230003 19930329 00002223000300001 BIB 8 22 2223000300002 REACTION (2-HE-3(N,G)2-HE-4,,SIG) 2223000300003 INC-SOURCE (REAC ) THE FILTERED BEAM FACILITY HB12, WHICH CONTAINS2223000300004 24 CM OF IRON, 36 CM OF ALUMINUM AND 6 CM OF SULPHUR, 2223000300005 WAS USED. BY TAPERED SOLLER-SLIT COLLIMATORS, A BEAM 2223000300006 DIMENSION OF 4 X 10 CM2 WAS OBTAINED. 2223000300007 INC-SPECT .QUASI-MONOENERGETIC BEAM OF 24.5 KEV. 2223000300008 DETECTOR (NAICR) THE 20.5 MEV CAPTURE GAMMA RAYS WERE DETECTED 2223000300009 BY A 25 CM DIAMETER BY 25 CM LONG NAI-TL DETECTOR, 2223000300010 PLACED AT 25 CM FROM THE TARGET CELL AND AT 90 DEGREES2223000300011 WITH RESPECT TO THE NEUTRON BEAM. THE DETECTOR WAS 2223000300012 SHIELDED AGAINST SCATTERED NEUTRONS AND GAMMA-RAYS NOT2223000300013 ORIGINATING FROM THE TARGET. THE RESPONSE FUNCTION WAS2223000300014 CALCULATED WITH A MONTE CARLO CODE. 2223000300015 SAMPLE .A CRYOGENIC LIQUID 3HE TARGET, OPERATING AT A TEMPE- 2223000300016 RATURE OF 1.28+/-0.02 K WAS USED. 2223000300017 MONITOR (79-AU-197(N,G)79-AU-198-G,,SIG) THE NEUTRON FLUX WAS 2223000300018 DETERMINED BY IRRADIATION OF A 350 MG/CM2 THICK GOLD 2223000300019 FOIL, SANDWICHED BETWEEN TWO 600 MG/CM2 GOLD PLATES 2223000300020 AND 1 MM CADMIUM SHEETS. 2223000300021 STATUS .DATA TAKEN FROM MAIN REF. 2223000300022 HISTORY (921219C) N.O. 2223000300023 (930329E) 2223000300024 ENDBIB 22 0 2223000300025 COMMON 2 3 2223000300026 MONIT MONIT-ERR 2223000300027 MB MB 2223000300028 6.2300E+02 9.0000E+00 2223000300029 ENDCOMMON 3 0 2223000300030 DATA 4 1 2223000300031 EN EN-RSL-HW DATA DATA-ERR 2223000300032 KEV KEV MICRO-B MICRO-B 2223000300033 2.4500E+01 1.8000E+00 9.1000E+00 8.0000E-01 2223000300034 ENDDATA 3 0 2223000300035 ENDSUBENT 34 0 2223000399999 ENDENTRY 3 0 2223099999999