ENTRY 20762 19840207 00002076200000001 SUBENT 20762001 19840207 00002076200100001 BIB 13 57 2076200100002 INSTITUTE (2FR ILL) 2076200100003 REFERENCE (C,76LOWELL,1027,7607) DATA ARE GIVEN. 2076200100004 (W,RAUCH,780201) ABSTRACT ABOUT THIS WORK. 2076200100005 (J,ZP,271,177,74) APPARATUS DETAILS ARE GIVEN. 2076200100006 AUTHOR (H.RAUCH,G.BADUREK,W.BAUSPIESS,U.BONSE,A.ZEILLINGER) 2076200100007 .THE FIRST TWO AND THE LAST ONE ARE FROM ATOMINSTITUT 2076200100008 DER OSTERREICHISCHEN HOCHSCHULEN IN WIEN,WHILE THE 2076200100009 OTHERS ARE FROM INSTITUT FUR PHYSIK DER UNIVERSITAT 2076200100010 AT DORTMUND IN GERMANY. 2076200100011 TITLE -DETERMINATION OF SCATTERING LENGTHS AND MAGNETIC SPIN 2076200100012 ROTATIONS BY NEUTRONS INTERFEROMETRY- 2076200100013 FACILITY .EXPERIMENTS WERE CARRIED OUT AT A RADIAL BEAM HOLE 2076200100014 OF THE HIGH FLUX 250KW TRIGA REACTOR IN THE L-L INST. 2076200100015 INC-SOURCE (REAC ) 34.5 MIN OF ARC COLLIMATED NEUTRON BEAM FROM 2076200100016 ILL REACTOR. 2076200100017 SAMPLE .FIVE 6*3*1 CM3 SAMPLES OF HIGH PURITY NATURAL ELEMENT 2076200100018 WERE USED CONSTITUTED BY SN(99.9995),AL(99.996),V 2076200100019 (99.95),BI(99.9995),NB(99.99) RESPECTIVELY. 2076200100020 METHOD .PERFECT CRYSTAL INTERFEROMETRY USING DYNAMICAL 2076200100021 DIFFRACTION THEORY PROPERTIES,OF A MONOCHROMATIC 2076200100022 COHERENT SLOW NEUTRON BEAM. 2076200100023 .A (200)-REFLECTION OF AN ORIENTED GRAPHITE 2076200100024 MONOCHROMATOR WITH A MOSAIC SPREAD OF 3DEG,WAS USED 2076200100025 IN A FIRST ARRANGEMENT GIVING A DISPERSION PARAMETER 2076200100026 TAN(TETHA1)/(TAN(TETHA2)=1.954,THEN A MONOCHROMATIC 2076200100027 NEUTRON BEAM WAS COLLIMATED WITHIN 16.5 MIN OF ARC. 2076200100028 .A PERFECT SILICON CRYSTAL WAS CUT AND POLISHED TO 2076200100029 GIVE THE E-SHAPED LAUE-TYPE INTERFEROMETER WITH A 2076200100030 SYMMETRICAL (220)-REFLECTION.THE DISTANCE BETWEEN 2076200100031 THE THREE CRYSTAL PLATES WERE 27.2936+-0.0009 MM,AND 2076200100032 THEIR THICKNESSES WERE 4.3954+-0.0008 MM (WITHIN A 2076200100033 HORIZONTAL PLANE). 2076200100034 .THE INTERFEROMETER COULD BE ROTATED BY A SUITABLE 2076200100035 GONIOMETER WITH A 0.5 SEC OF ARC ACCURACY. 2076200100036 .THE WIDTH OF THE INTERF.ROCKING CURVE WAS 27MIN ARC. 2076200100037 .BEHIND THE INTERFEROMETER,DEVIATED AND FORWARD BEAMS 2076200100038 WERE COLLIMATED WITHIN 27.5 MIN OF ARC,AND REACHED 2076200100039 EACH A HE-3 TYPE DETECTOR WITH A VERTICAL DIVERGENCY 2076200100040 OF 45 MIN. 2076200100041 .SAMPLES OF SHIFTING MATERIAL WERE PLACED BETWEEN TWO 2076200100042 OF THE CRYSTAL PLATES. 2076200100043 .CONTINUOUS VARIATION OF THE PHASE SHIFT WAS OBTAINED 2076200100044 BY ROTATING THE SAMPLE WITHIN THE E-TYPE CRYSTAL. 2076200100045 DETECTOR (IOCH ) HE-3 DETECTOR. 2076200100046 ANALYSIS .EXPERIMENTAL RESULTS WERE FITTED TO A CURVE A+B*COS(C)2076200100047 WHERE C CONTAINED REFRACTIVE INDEX,NUMBER OF NUCLEI 2076200100048 PER UNIT VOLUME AND THE BOUND COHERENT SCATTERING 2076200100049 LENGTH. 2076200100050 STATUS .DATA TAKEN FROM 76LOWELL. 2076200100051 HISTORY (780301C) 2076200100052 (780705E) 2076200100053 CORRECTION .VARIOUS SHIELDINGS AROUND THE INTERFEROMETER PART 2076200100054 INHIBITED TEMPERATURE INHOMOGENEITIES WITHIN THE 2076200100055 CRYSTAL. 2076200100056 .FINITE WAVE LENGTH RESOLUTION,ERRORS FROM DENSITY 2076200100057 AND THICKNESS DETERMINATION,INDEX OF REFRACTION OF 2076200100058 AIR AND LONG TERM DRIFTS WERE TAKEN INTO ACCOUNT. 2076200100059 ENDBIB 57 0 2076200100060 NOCOMMON 0 0 2076200100061 ENDSUBENT 60 0 2076200199999 SUBENT 20762002 19840207 00002076200200001 BIB 2 3 2076200200002 REACTION (13-AL-27(N,THS)13-AL-27,COH,AMP) BOUND ATOMS. 2076200200003 HISTORY (780301C) 2076200200004 (780705E) 2076200200005 ENDBIB 3 0 2076200200006 NOCOMMON 0 0 2076200200007 DATA 2 1 2076200200008 EN DATA 2076200200009 MILLI-EV FERMI 2076200200010 2.5500E+01 3.4470E+00 2076200200011 ENDDATA 3 0 2076200200012 ENDSUBENT 11 0 2076200299999 SUBENT 20762003 19840207 00002076200300001 BIB 2 3 2076200300002 REACTION (23-V-50(N,THS)23-V-50,COH,AMP) BOUND ATOMS. 2076200300003 HISTORY (780301C) 2076200300004 (780705E) 2076200300005 ENDBIB 3 0 2076200300006 NOCOMMON 0 0 2076200300007 DATA 2 1 2076200300008 EN DATA 2076200300009 MILLI-EV FERMI 2076200300010 2.5500E+01-4.0800E-01 2076200300011 ENDDATA 3 0 2076200300012 ENDSUBENT 11 0 2076200399999 SUBENT 20762004 19840207 00002076200400001 BIB 2 3 2076200400002 REACTION (41-NB-93(N,THS)41-NB-93,COH,AMP) BOUND ATOMS. 2076200400003 HISTORY (780301C) 2076200400004 (780705E) 2076200400005 ENDBIB 3 0 2076200400006 NOCOMMON 0 0 2076200400007 DATA 2 1 2076200400008 EN DATA 2076200400009 MILLI-EV FERMI 2076200400010 2.5500E+01 7.0800E+00 2076200400011 ENDDATA 3 0 2076200400012 ENDSUBENT 11 0 2076200499999 SUBENT 20762005 19840207 00002076200500001 BIB 2 3 2076200500002 REACTION (50-SN-0(N,THS),COH,AMP) BOUND ATOMS. 2076200500003 HISTORY (780301C) 2076200500004 (780705E) 2076200500005 ENDBIB 3 0 2076200500006 NOCOMMON 0 0 2076200500007 DATA 2 1 2076200500008 EN DATA 2076200500009 MILLI-EV FERMI 2076200500010 2.5500E+01 6.2200E+00 2076200500011 ENDDATA 3 0 2076200500012 ENDSUBENT 11 0 2076200599999 SUBENT 20762006 19840207 00002076200600001 BIB 2 3 2076200600002 REACTION (83-BI-209(N,THS)83-BI-209,COH,AMP) BOUND ATOMS. 2076200600003 HISTORY (780301C) 2076200600004 (780705E) 2076200600005 ENDBIB 3 0 2076200600006 NOCOMMON 0 0 2076200600007 DATA 2 1 2076200600008 EN DATA 2076200600009 MILLI-EV FERMI 2076200600010 2.5500E+01 8.5800E+00 2076200600011 ENDDATA 3 0 2076200600012 ENDSUBENT 11 0 2076200699999 ENDENTRY 6 0 2076299999999