ENTRY 22248 19970311 00002224800000001 SUBENT 22248001 19970311 00002224800100001 BIB 12 50 2224800100002 TITLE -HE4 EMISSION IN THE INTERACTIONS OF FAST NEUTRONS 2224800100003 WITH TI48 AND TI50. 2224800100004 AUTHOR (S.M.QAIM,M.UHL,N.I.MOLLA,H.LISKIEN) 2224800100005 INSTITUTE (2GERJUL) S.M.QAIM, N.I.MOLLA 2224800100006 (2AUSIRK) M.UHL 2224800100007 (2ZZZGEL) H.LISKIEN AND EXPERIMENTAL SITE,IRMM GEEL 2224800100008 REFERENCE (J,PR/C,46,(4),1398,9210) 2224800100009 FACILITY (VDG,2BLGBLG) THE CN-TYPE VAN DE GRAAFF ACCELERATOR 2224800100010 AT THE IRMM IN GEEL WAS USED FOR IRRADIATION. 2224800100011 INC-SOURCE (D-T ) 2224800100012 THE IRRADIATION AND THE NEUTRON FLUX MEASUREMENTS 2224800100013 HAVE BEEN DESCRIBED BY LISKIEN IN APPL. RAD. ISO. 2224800100014 41,83,1990. 2224800100015 SAMPLE .A 5 G TI METAL POWDER (GT 99.9 PC KOCH-LIGHT UK) WAS 2224800100016 PRESSED TO A DISC (DIAM 2 CM, THICKN 0.5 CM). 2224800100017 15 SUCH SAMPLES WERE MADE, EACH OF THEM SANDWITCHED 2224800100018 BETWEEN PAIRS OF AL SHEETS. FOR THE STUDY OF TI48(N,A)2224800100019 REACTION, A CHEMICAL SEPARATION WAS PERFORMED SINCE 2224800100020 THE PRODUCT IS A LONG LIVED SOFT BETA- EMITTER. 2224800100021 IRRADIATION WERE MADE AT 8 N ENERGIES FROM 12.6 TO 2224800100022 19.6 MEV.THE LATTER WAS IN THE DIRECTION OF THE 2224800100023 DEUTERON BEAM. FOR THE REST 2 SAMPLES WERE IRRADIATED,2224800100024 PLACED AT DIFFERENT ANGLES AROUND THE SYMMETRY AXIS 2224800100025 AND THE RESULTS AVERAGED. ONLY 1 SAMPLE WAS DONE FOR 2224800100026 EACH ENERGY FOR THE TI48(N,A) REACTION. 2224800100027 METHOD (ACTIV) THE NEUTRON ACTIVATION TECHNIQUE WAS USED. 2224800100028 DETECTOR (GELI ) THE GAMMA ACTIVITY FLOLLOWING TI-50(N,A)CA-47 2224800100029 REACTION WAS MEASURED USING A WELL CALIBRATED GE(LI) 2224800100030 DETECTOR WITH A 6 PERCENT UNCERTINTY ON THE ABSOLUTE 2224800100031 ACTIVITY THE ACTIVITY OF THE CA-45CO-3 WAS MEASURED 2224800100032 VIA LOW LEVEL ANTICOINCIDENCE BETA- COUNTING USING A 2224800100033 BETA-DETECTOR (NOT SPECIFIED) WHOSE EFFICIENCY WAS 2224800100034 DETERMINED USING A STANDARD CA45 SOURCE WITH A 12 2224800100035 PERCENT UNCERTAINTY. 2224800100036 MONITOR (13-AL-27(N,A)11-NA-24-G,,SIG) THIS RECTION AND A 2224800100037 PROTON RECOIL TELESCOPE WERE USED TO DETERMINE THE 2224800100038 NEUTRON FLUX DENSITY. THE TOTAL FLUENCE UNCERTAINTY 2224800100039 IS ABOUT 3 PERCENT (PC). 2224800100040 ERR-ANALYS (ERR-T) ERROR ON THE EXPERIMENTAL VALUES WAS DERIVED 2224800100041 TAKING INTO ACCOUNT THE ERROR (IN PERCENT) ON 2224800100042 -THE TOTAL NEUTRON FLUX (ABOUT 3PERCENT) 2224800100043 -THE ABSOLUTE GAMMA ACTIVITY OF THE PRODUCTS 2224800100044 COUNTED (6PC) FOR THE CA47 SAMPL2224800100045 -CHEMICAL YIELD AT SEPARATION (8PC) FOR THE CA45 SAMPL2224800100046 -COUNTING STATISTICS (LT. 2.5PC) FOR THE CA45 SAMPL2224800100047 -BETA- DETECTION EFFICIENCY (12PC) FOR THE CA45 SAMPL2224800100048 HISTORY (930813C) N.O. 2224800100049 (931129E) 2224800100050 (970311U) INSTITUTE AND FACILITY CODES CORRECTED 2224800100051 BY S.MAEV 2224800100052 ENDBIB 50 0 2224800100053 NOCOMMON 0 0 2224800100054 ENDSUBENT 53 0 2224800199999 SUBENT 22248002 19970311 00002224800200001 BIB 3 3 2224800200002 REACTION (22-TI-48(N,A)20-CA-45,,SIG) 2224800200003 DECAY-DATA (20-CA-45,163.D,B,258.,1.00) 2224800200004 STATUS .DATA TAKEN FROM TABLE 2 OF THE MAIN REF. 2224800200005 ENDBIB 3 0 2224800200006 NOCOMMON 0 0 2224800200007 DATA 4 8 2224800200008 EN EN-ERR DATA ERR-T 2224800200009 MEV MEV MB MB 2224800200010 12.64 0.21 37. 6. 2224800200011 13.43 0.30 38. 6. 2224800200012 14.36 0.36 47. 7. 2224800200013 15.82 0.37 45. 7. 2224800200014 16.93 0.37 40. 6. 2224800200015 17.92 0.35 41. 6. 2224800200016 18.81 0.26 32. 5. 2224800200017 19.58 0.23 31. 5. 2224800200018 ENDDATA 10 0 2224800200019 ENDSUBENT 18 0 2224800299999 SUBENT 22248003 19970311 00002224800300001 BIB 3 3 2224800300002 REACTION (22-TI-50(N,A)20-CA-47,,SIG) 2224800300003 DECAY-DATA (20-CA-47,4.5D,DG,1297.,0.77) 2224800300004 STATUS .DATA TAKEN FROM TABLE 2 OF THE MAIN REF. 2224800300005 ENDBIB 3 0 2224800300006 NOCOMMON 0 0 2224800300007 DATA 4 8 2224800300008 EN EN-ERR DATA ERR-T 2224800300009 MEV MEV MB MB 2224800300010 12.64 0.21 5.4 0.4 2224800300011 13.43 0.30 6.6 0.5 2224800300012 14.36 0.36 7.9 0.6 2224800300013 15.82 0.37 9.7 0.7 2224800300014 16.93 0.37 10.6 0.8 2224800300015 17.92 0.35 10.7 0.8 2224800300016 18.81 0.26 12.2 0.9 2224800300017 19.58 0.23 13.1 0.9 2224800300018 ENDDATA 10 0 2224800300019 ENDSUBENT 18 0 2224800399999 ENDENTRY 3 0 2224899999999