ENTRY 20208 19831121 00002020800000001 SUBENT 20208001 19831121 00002020800100001 BIB 17 48 2020800100002 INSTITUTE (2BLGMOL) 2020800100003 REFERENCE (J,NP,62,641,6502) DY-163, TM-169, HF-177. 2020800100004 (J,JPR,22,707,6110) IN-115, HF-177 (PRELIMINARY) 2020800100005 (P,EANDC(E)-76,101,6701) HF-177, 2.4 EV RESONANCE STUDY2020800100006 WITH IMPROVED EXPERIMENTAL CONDITIONS. 2020800100007 SPIN OF RESONANCE = 4 CONFIRMED. SEE ENTRY 20180. 2020800100008 (J,NIM,17,342,6210) APPARATUS AND METHODS DESCRIBED. 2020800100009 SEE ENTRY 20210. 2020800100010 AUTHOR (H.CEULEMANS, F.POORTMANS) 2020800100011 TITLE - SPINS OF SLOW NEUTRON RESONANCES IN HF, TM AND DY - 2020800100012 FACILITY (SPECC) BR1-REACTOR, CRYSTAL SPECTROMETER. 2020800100013 INC-SOURCE (REAC ) BR1-REACTOR, NEUTRON BEAM FROM THE CORE. 2020800100014 INC-SPECT .MONOCHROMATIC BEAM OBTAINED FROM BRAGG-REFLECTION ON 2020800100015 CU(111) PLANES. 2020800100016 SAMPLE .SCATTERING SAMPLE AT RIGHT ANGLE TO NEUTRON BEAM, 2020800100017 SURROUNDED BY PROPORTIONAL COUNTERS IN CYLINDRICAL 2020800100018 GEOMETRY. 2020800100019 METHOD .MEASURING THE RATIO OF SCATTERING CROSS-SECTION 2020800100020 TO THE TOTAL CROSS-SECTION AT RESONANCE ENERGY. 2020800100021 DETECTOR (PROPC) EIGHT PROPORTIONAL COUNTERS FILLED WITH 2020800100022 BORON TRIFLUORIDE ENRICHED IN BORON-10. 2020800100023 DETECTORS ARE 40 CM LONG, 5 CM IN DIAMETER, 2020800100024 WITH 700 TORR PRESSURE. 2020800100025 ANALYSIS .THE QUANTITY OBTAINED FROM THIS EXPERIMENT IS THE 2020800100026 RATIO OF NEUTRON WIDTH TO TOTAL WIDTH. THE STATISTICAL2020800100027 WEIGHT FACTOR AND THEREFORE THE SPIN OF THE COMPOUND 2020800100028 LEVEL IS FOUND BY COMBINING THIS RATIO WITH RESONANCE 2020800100029 PARAMETERS IN BNL-325 FOR DY AND TM AND WITH RESONANCE2020800100030 PARAMETERS IN PHYS. REV. 101, 726(1956) FOR HAFNIUM. 2020800100031 .FOR DYSPROSIUM THE RESONANT SCATTERING INTENSITY 2020800100032 OBTAINED FROM DIFFERENCE BETWEEN COUNTING RATE AT 2020800100033 RESONANCE ENERGY AND IN THE WINGS OF THE RESONANCE. 2020800100034 .FOR THULIUM AND HAFNIUM NET COUNTING RATE OBTAINED 2020800100035 FROM DIFFERENCE BETWEEN SAMPLE IN AND SAMPLE OUT 2020800100036 COUNTING RATE. 2020800100037 MONITOR (82-PB-0(N,EL),,SIG) 2020800100038 SCATTERING CROSS-SECTION OF LEAD, VALUE 2020800100039 NOT GIVEN. 2020800100040 PART-DET (N ) NEUTRONS 2020800100041 STATUS .DATA FROM NUCL.PHYS.,62(1965)641. 2020800100042 .BIB-SECTION FORTIFIED BY PRIVATE COMMUNICATION. 2020800100043 HISTORY (721005C) 2020800100044 (740521E) 2020800100045 CORRECTION .CORRECTIONS APPLIED FOR SAMPLE THICKNESS, FOR 2020800100046 DYSPROSIUM CORRECTION ALSO APPLIED FOR INFLUENCE 2020800100047 OF SECOND ORDER NEUTRONS. 2020800100048 ERR-ANALYS .STATISTICAL ERROR DERIVED FROM OBSERVED VARIANCE ON A 2020800100049 SERIES OF MEASUREMENTS. 2020800100050 ENDBIB 48 0 2020800100051 NOCOMMON 0 0 2020800100052 ENDSUBENT 51 0 2020800199999 SUBENT 20208002 19831121 00002020800200001 BIB 3 8 2020800200002 REACTION ((66-DY-163(N,EL),,WID)/ 2020800200003 (66-DY-163(N,TOT),,WID)) 2020800200004 SAMPLE .VACCUM EVAPORATION OF DYSPROSIUM METAL ON 2020800200005 ALUMINIUM (10 MICROM.) OR MYLAR (6 MICRON.) BACKING 2020800200006 .THREE SAMPLES USED WITH TOTAL THICKNESS OF 2020800200007 6.43E19 ATOMS/CM*CM AND DIAMETER OF 30 MILLIMETER 2020800200008 HISTORY (721005C) 2020800200009 (740521E) 2020800200010 ENDBIB 8 0 2020800200011 NOCOMMON 0 0 2020800200012 DATA 3 1 2020800200013 EN-RES DATA DATA-ERR 2020800200014 EV NO-DIM NO-DIM 2020800200015 1.7100E+00 1.9500E-02 4.5000E-03 2020800200016 ENDDATA 3 0 2020800200017 ENDSUBENT 16 0 2020800299999 SUBENT 20208003 19831121 00002020800300001 BIB 3 7 2020800300002 REACTION (66-DY-163(N,0),,J) 2020800300003 SAMPLE .VACUUM EVAPORATION OF DYSPROSIUM METAL ON 2020800300004 ALUMINIUM (10 MICROM.) OR MYLAR (6 MICROM.) BACKING. 2020800300005 .THREE SAMPLES USED WITH TOTAL THICKNESS OF 2020800300006 6.43E19 ATOMS/CM*CM AND DIAMETER OF 30 MILLIMETER 2020800300007 HISTORY (721005C) 2020800300008 (740521E) 2020800300009 ENDBIB 7 0 2020800300010 NOCOMMON 0 0 2020800300011 DATA 2 1 2020800300012 EN-RES DATA 2020800300013 EV NO-DIM 2020800300014 1.7100E+00 2.0000E+00 2020800300015 ENDDATA 3 0 2020800300016 ENDSUBENT 15 0 2020800399999 SUBENT 20208004 19831121 00002020800400001 BIB 3 7 2020800400002 REACTION ((69-TM-169(N,EL),,WID)/ 2020800400003 (69-TM-169(N,TOT),,WID)) 2020800400004 SAMPLE .VACUUM EVAPORATION OF METAL ON ALUMINIUM 2020800400005 BACKING, DIAMETER OF SAMPLE IS 30 MILLIM., 2020800400006 THICKNESS IS 1.94E19 ATOMS/CM*CM. 2020800400007 HISTORY (721005C) 2020800400008 (740521E) 2020800400009 ENDBIB 7 0 2020800400010 NOCOMMON 0 0 2020800400011 DATA 3 1 2020800400012 EN-RES DATA DATA-ERR 2020800400013 EV NO-DIM NO-DIM 2020800400014 3.9200E+00 1.0100E-01 8.0000E-03 2020800400015 ENDDATA 3 0 2020800400016 ENDSUBENT 15 0 2020800499999 SUBENT 20208005 19831121 00002020800500001 BIB 3 6 2020800500002 REACTION (69-TM-169(N,0),,J) 2020800500003 SAMPLE .VACCUM EVAPORATION OF METAL ON ALUMINIUM 2020800500004 BACKING, DIAMETER OF SAMPLE IS 30 MILLIM., 2020800500005 THICKNESS IS 1.94E19 ATOMS/CM*CM. 2020800500006 HISTORY (721005C) 2020800500007 (740521E) 2020800500008 ENDBIB 6 0 2020800500009 NOCOMMON 0 0 2020800500010 DATA 2 1 2020800500011 EN-RES DATA 2020800500012 EV NO-DIM 2020800500013 3.9200E+00 1.0000E+00 2020800500014 ENDDATA 3 0 2020800500015 ENDSUBENT 14 0 2020800599999 SUBENT 20208006 19831121 00002020800600001 BIB 3 10 2020800600002 REACTION ((72-HF-177(N,EL),,WID)/ 2020800600003 (72-HF-177(N,TOT),,WID)) 2020800600004 SAMPLE .EVAPORATION BY ELECTRON BOMBARDMENT OF 2020800600005 HAFNIUM METAL WITH 3 PERCENT (BYWEIGHT) 2020800600006 ZIRCONIUM IMPURITY. ALUMINIUM PACKING WITH 2020800600007 THICKNESS OF 3 MILLIGR/CM*CM. THREE DEPOSITS 2020800600008 USED WITH DIAMETER OF 30 MILLIMETER AND 2020800600009 TOTAL THICKNESS OF 3.04E19 ATOMS/CM*CM. 2020800600010 HISTORY (721005C) 2020800600011 (740521E) 2020800600012 ENDBIB 10 0 2020800600013 NOCOMMON 0 0 2020800600014 DATA 3 2 2020800600015 EN-RES DATA DATA-ERR 2020800600016 EV NO-DIM NO-DIM 2020800600017 1.1000E+00 3.6600E-02 4.0000E-03 2020800600018 2.4000E+00 1.2500E-01 8.0000E-03 2020800600019 ENDDATA 4 0 2020800600020 ENDSUBENT 19 0 2020800699999 SUBENT 20208007 19831121 00002020800700001 BIB 3 9 2020800700002 REACTION (72-HF-177(N,0),,J) 2020800700003 SAMPLE .EVAPORATION BY ELECTRON BOMBARDMENT OF 2020800700004 HAFNIUM METAL WITH 3 PERCENT (BYWEIGHT) 2020800700005 ZIRCONIUM IMPURITY. ALUMINIUM PACKING WITH 2020800700006 THICKNESS OF 3 MILLIGR/CM*CM. THREE DEPOSITS 2020800700007 USED WITH DIAMETER OF 30 MILLIMETER AND 2020800700008 TOTAL THICKNESS OF 3.04E19 ATOMS/CM*CM. 2020800700009 HISTORY (721005C) 2020800700010 (740521E) 2020800700011 ENDBIB 9 0 2020800700012 NOCOMMON 0 0 2020800700013 DATA 2 2 2020800700014 EN-RES DATA 2020800700015 EV NO-DIM 2020800700016 1.1000E+00 3.0000E+00 2020800700017 2.4000E+00 4.0000E+00 2020800700018 ENDDATA 4 0 2020800700019 ENDSUBENT 18 0 2020800799999 ENDENTRY 7 0 2020899999999