ENTRY 22708 20170202 22592270800000001 SUBENT 22708001 20170202 22592270800100001 BIB 17 100 2270800100002 TITLE A systematic study of (n,7Be) reactions on medium and 2270800100003 heavy mass nuclei induced by 53 MeV d(Be)-Breakup 2270800100004 neutrons 2270800100005 AUTHOR (B.Scholten,S.M.Qaim,G.Stoecklin) 2270800100006 INSTITUTE (2GERJUL) 2270800100007 REFERENCE (J,RCA,62,107,1993) 2270800100008 (C,91JUELIC,,711,1991) Prelim.data on Figs. 2270800100009 INC-SOURCE (D-BE) The 53 MeV deuteron beam impinging on a 1 cm 2270800100010 thick water-cooled Be disc produced breakup neutrons 2270800100011 which were very strongly forward peaked. 2270800100012 The elements to be irradiated were packed between Al 2270800100013 monitor foils. The thickness of each packing 2270800100014 containing several elements was kept between 0.8 and 2270800100015 1.5 cm. 2270800100016 INC-SPECT Mean neutron flux density of about 3.x10**10 n/cm2/sec 2270800100017 The neutron spectrum in the 0.degr. direction was 2270800100018 characterized by TOF technique over the neutron energy 2270800100019 range of 11.5 to 43.5 MeV by Schweimer and 4 to 50 MeV 2270800100020 by Meulders et al. (see REL-REF). The averaged result 2270800100021 extrapolated up to 53 MeV was used as a standard in 2270800100022 the present work. The integrated neutron flux was 2270800100023 adopted as 6.377 x 10**11 n/mu-C/sr. 2270800100024 Originally adopted spectrum is in EXFOR Subent 2270800100025 o1924.002 - neutron energy range 12.5 -43.5 MeV. 2270800100026 Then neutron spectrum shape was reconstructed using 2270800100027 extensive measurement data ( 4- 50 MeV energy range) 2270800100028 of Meulders+. 2270800100029 Neutron spectrum provided by S.M.Qaim ( 29-12-2016): 2270800100030 units: energy - MeV, yield - 10**8n/(muC*MeV*sr) 2270800100031 Energy Neutron yield Energy Neutron yield 2270800100032 4. 51.5 30. 126.7 2270800100033 5. 61.2 31. 111.0 2270800100034 6. 72.7 32. 97.3 2270800100035 7. 85.7 33. 85.3 2270800100036 8. 99.4 34. 75.0 2270800100037 9. 113.1 35. 66.1 2270800100038 10. 126.4 36. 58.4 2270800100039 11. 139.2 37. 51.9 2270800100040 12. 151.9 38. 46.2 2270800100041 13. 164.8 39. 41.4 2270800100042 14. 178.0 40. 37.1 2270800100043 15. 191.7 41. 33.2 2270800100044 16. 205.9 42. 29.5 2270800100045 17. 220.0 43. 25.9 2270800100046 18. 233.4 44. 22.3 2270800100047 19. 245.0 45. 18.8 2270800100048 20. 253.6 46. 15.7 2270800100049 21. 257.9 47. 12.9 2270800100050 22. 256.9 48. 10.6 2270800100051 23. 250.2 49. 8.8 2270800100052 24. 238.3 50. 7.2 2270800100053 25. 222.1 51. 5.9 2270800100054 26. 203.2 52. 4.9 2270800100055 27. 183.1 53. 4.0 2270800100056 28. 163.1 54. 3.1 2270800100057 29. 144.1 2270800100058 REL-REF (R,O1924002,G.W.Schweimer,J,NP/A,100,537,1967) Neutron 2270800100059 (M,,J.P.Meulders+,J,PMB,20,235,1975) spectrum 2270800100060 MONITOR (13-AL-27(N,A)11-NA-24,,SIG,,SPA) The neutron flux 2270800100061 density effective at the irradiated sample was 2270800100062 determined via 27Al(n,a) monitor reaction, the 2270800100063 excitation function of which is known well up to 28 MeV2270800100064 DECAY-DATA (4-BE-7,53.D,DG,477.6,0.104) 2270800100065 53.+-1. day HL was measured. 2270800100066 MONIT-REF (,H.Vonach,R,IAEA/TA-227,59,1984) 2270800100067 (,B.P.Hayhurst+,J,PR/C,12,451,1975) 2270800100068 FACILITY (ISOCY,2GERJUL) The Julich Isochron.Cyclotron 2270800100069 DETECTOR (GELI) 32 cm3 Ge(Li) detector coupled to a Nuclear Data2270800100070 ND66 multichannel system was used. 2270800100071 METHOD (CHSEP,STTA) The details of separations from various 2270800100072 irradiated targets are given. 2270800100073 SAMPLE Samples were packed between Al monitor foils. In 2270800100074 general two and in exceptional cases a maximum of 2270800100075 five elements were packed together. 2270800100076 ERR-ANALYS (ERR-1) The total error in the neutron flux density 2270800100077 includes: 2270800100078 3% - deviations in deuteron beam currents in long 2270800100079 radiations; 2270800100080 10% - uncertainty in the spectrum-averaged 2270800100081 cross-section of the 27Al(n,alpha) monitor reaction; 2270800100082 5% - uncertainty in the intensity distribution of the 2270800100083 forward peaked neutrons; 2270800100084 4% - uncertainty in the absolute activity of 14Na; 2270800100085 (ERR-2) Error related to the efficiency of the detector2270800100086 (ERR-3) The error due to the chemical yield of 7Be 2270800100087 separation; 2270800100088 (ERR-4,5.,50.) Error in the peak area analysis 2270800100089 (error in determination of Be-7 activity 2270800100090 originated from the low counting rates ) 2270800100091 (ERR-T) Total errors in the (n,7Be) cross sections. 2270800100092 STATUS (TABLE) Table 4 from RCA,62,107,1993 2270800100093 HISTORY (20010422C) 2270800100094 (20151009A) SD: DECAY-DATA added to Subent 001, 2270800100095 EN=53.MeV -> EN-DUMMY=22.5MeV. SF4 in REACTION code was2270800100096 changed in Subents 2 - 10 following N.Otsuka's comment.2270800100097 Isotope abundance of target was added in Subents 2-10. 2270800100098 METHOD (TOF) deleted, (CHSEP) added. SAMPLE, 2270800100099 INC-SOURCE update. 2270800100100 (20170202A) M.M. INC-SPECT information was added. 2270800100101 SPA was added in MONITOR reaction. ERR-4 was added. 2270800100102 ENDBIB 100 0 2270800100103 COMMON 6 3 2270800100104 EN-DUMMY MONIT MONIT-ERR ERR-1 ERR-2 ERR-3 2270800100105 MEV MB MB PER-CENT PER-CENT PER-CENT 2270800100106 22.5 20.7 2.0 12.0 7.0 4.0 2270800100107 ENDCOMMON 3 0 2270800100108 ENDSUBENT 107 0 2270800199999 SUBENT 22708002 20151009 22452270800200001 BIB 3 5 2270800200002 REACTION (13-AL-27(N,X)4-BE-7,,SIG,,SPA) 2270800200003 SAMPLE (13-AL-27,NAT=1.) Foils (15,90,500 mu-m thick); 99.999%2270800200004 - purity; Supplier - Goodfellow; typical mass - 2.5 g.2270800200005 HISTORY (20151009A) SD: SF3=Be-7 -> X, SF4=F-21 -> Be-7, 2270800200006 SF8=SPA added in REACTION code. 2270800200007 ENDBIB 5 0 2270800200008 NOCOMMON 0 0 2270800200009 DATA 2 1 2270800200010 DATA ERR-T 2270800200011 MICRO-B MICRO-B 2270800200012 0.92 0.16 2270800200013 ENDDATA 3 0 2270800200014 ENDSUBENT 13 0 2270800299999 SUBENT 22708003 20151009 22452270800300001 BIB 3 5 2270800300002 REACTION (14-SI-28(N,X)4-BE-7,,SIG,,SPA) 2270800300003 SAMPLE (14-SI-28,NAT=0.9221) Wafer (in Al-capsule); 99.999% - 2270800300004 purity; Supplier - Goodfellow; typical mass - 1.1 g. 2270800300005 HISTORY (20151009A) SD: SF3=Be-7 -> X, SF4=Ne-22 -> Be-7, 2270800300006 SF8=SPA added in REACTION code. 2270800300007 ENDBIB 5 0 2270800300008 NOCOMMON 0 0 2270800300009 DATA 2 1 2270800300010 DATA ERR-T 2270800300011 MICRO-B MICRO-B 2270800300012 3.2 0.5 2270800300013 ENDDATA 3 0 2270800300014 ENDSUBENT 13 0 2270800399999 SUBENT 22708004 20151009 22452270800400001 BIB 3 5 2270800400002 REACTION (23-V-51(N,X)4-BE-7,,SIG,,SPA) 2270800400003 SAMPLE (23-V-51,NAT=0.9976) Foils (25,500 mu-m thick); 99.8%- 2270800400004 purity; Supplier - Goodfellow; typical mass - 1.0 g. 2270800400005 HISTORY (20151009A) SD: SF3=Be-7 -> X, SF4=K-45 -> Be-7, 2270800400006 SF8=SPA added in REACTION code. 2270800400007 ENDBIB 5 0 2270800400008 NOCOMMON 0 0 2270800400009 DATA 2 1 2270800400010 DATA ERR-T 2270800400011 MICRO-B MICRO-B 2270800400012 0.21 0.10 2270800400013 ENDDATA 3 0 2270800400014 ENDSUBENT 13 0 2270800499999 SUBENT 22708005 20151009 22452270800500001 BIB 3 5 2270800500002 REACTION (26-FE-56(N,X)4-BE-7,,SIG,,SPA) 2270800500003 SAMPLE (26-FE-56,NAT=0.9156) Foils (125 mu-m thick); 99.5% - 2270800500004 purity; Supplier - Goodfellow; typical mass - 1.0 g. 2270800500005 HISTORY (20151009A) SD: SF3=Be-7 -> X, SF4=Ti-50 -> Be-7, 2270800500006 SF8=SPA added in REACTION code. 2270800500007 ENDBIB 5 0 2270800500008 NOCOMMON 0 0 2270800500009 DATA 2 1 2270800500010 DATA ERR-T 2270800500011 MICRO-B MICRO-B 2270800500012 0.95 0.14 2270800500013 ENDDATA 3 0 2270800500014 ENDSUBENT 13 0 2270800599999 SUBENT 22708006 20151009 22452270800600001 BIB 3 6 2270800600002 REACTION (27-CO-59(N,X)4-BE-7,,SIG,,SPA) 2270800600003 SAMPLE (27-CO-59,NAT=1.) Pellet (pressed from powder); 2270800600004 99.999% - purity; supplier - Koch-Light; typical 2270800600005 mass - 1.5 g. 2270800600006 HISTORY (20151009A) SD: SF3=Be-7 -> X, SF4=V-53 -> Be-7, 2270800600007 SF8=SPA added in REACTION code. 2270800600008 ENDBIB 6 0 2270800600009 NOCOMMON 0 0 2270800600010 DATA 2 1 2270800600011 DATA ERR-T 2270800600012 MICRO-B MICRO-B 2270800600013 1.3 0.4 2270800600014 ENDDATA 3 0 2270800600015 ENDSUBENT 14 0 2270800699999 SUBENT 22708007 20151009 22452270800700001 BIB 3 6 2270800700002 REACTION (33-AS-75(N,X)4-BE-7,,SIG,,SPA) 2270800700003 SAMPLE (33-AS-75,NAT=1.) Pellet (pressed from powder) or 2270800700004 powder (in Al-capsule); 99.9998% - purity; Supplier - 2270800700005 Hicol; typical mass-0.8g. 2270800700006 HISTORY (20151009A) SD: SF3=Be-7 -> X, SF4=Cu-69 -> Be-7, 2270800700007 SF8=SPA added in REACTION code. 2270800700008 ENDBIB 6 0 2270800700009 NOCOMMON 0 0 2270800700010 DATA 2 1 2270800700011 DATA ERR-T 2270800700012 MICRO-B MICRO-B 2270800700013 0.9 0.5 2270800700014 ENDDATA 3 0 2270800700015 ENDSUBENT 14 0 2270800799999 SUBENT 22708008 20151009 22452270800800001 BIB 3 5 2270800800002 REACTION (41-NB-93(N,X)4-BE-7,,SIG,,SPA) 2270800800003 SAMPLE (41-NB-93,NAT=1.) Foils (500 mu-m thick); 99.9%-purity;2270800800004 Supplier - Goodfellow; typical mass - 1.9 g. 2270800800005 HISTORY (20151009A) SD: SF3=Be-7 -> X, SF4=Rb-87 -> Be-7, 2270800800006 SF8=SPA added in REACTION code. 2270800800007 ENDBIB 5 0 2270800800008 NOCOMMON 0 0 2270800800009 DATA 2 1 2270800800010 DATA ERR-T 2270800800011 MICRO-B MICRO-B 2270800800012 0.52 0.20 2270800800013 ENDDATA 3 0 2270800800014 ENDSUBENT 13 0 2270800899999 SUBENT 22708009 20151009 22452270800900001 BIB 3 5 2270800900002 REACTION (79-AU-197(N,X)4-BE-7,,SIG,,SPA) 2270800900003 SAMPLE (79-AU-197,NAT=1.) Foils (20,120 mu-m thick); 99.999% 2270800900004 - purity; Supplier - Degussa; typical mass - 3.1 g. 2270800900005 HISTORY (20151009A) SD: SF3=Be-7 -> X, SF4=Re-191 -> Be-7, 2270800900006 SF8=SPA added in REACTION code. 2270800900007 ENDBIB 5 0 2270800900008 NOCOMMON 0 0 2270800900009 DATA 2 1 2270800900010 DATA ERR-T 2270800900011 MICRO-B MICRO-B 2270800900012 0.52 0.25 2270800900013 ENDDATA 3 0 2270800900014 ENDSUBENT 13 0 2270800999999 SUBENT 22708010 20151009 22452270801000001 BIB 3 6 2270801000002 REACTION (83-BI-209(N,X)4-BE-7,,SIG,,SPA) 2270801000003 SAMPLE (83-BI-209,NAT=1.) Pellet (pressed from powder); 2270801000004 99.999% - purity; Supplier - Koch-Light; 2270801000005 typical mass - 1.8 g. 2270801000006 HISTORY (20151009A) SD: SF3=Be-7 -> X, SF4=Au-203 -> Be-7, 2270801000007 SF8=SPA added in REACTION code. 2270801000008 ENDBIB 6 0 2270801000009 NOCOMMON 0 0 2270801000010 DATA 2 1 2270801000011 DATA ERR-T 2270801000012 MICRO-B MICRO-B 2270801000013 4.5 0.7 2270801000014 ENDDATA 3 0 2270801000015 ENDSUBENT 14 0 2270801099999 ENDENTRY 10 0 2270899999999