ENTRY D4038 20140528 D094D403800000001 SUBENT D4038001 20140528 D094D403800100001 BIB 13 73 D403800100002 TITLE Radiochemical study of the 209Bi(p,7Be)203Hg process D403800100003 from 20 to 70 MeV via identification of the emitted D403800100004 particle (7Be) and the product nucleus (203Hg) D403800100005 AUTHOR (B.Neumaier, F.Roesch, S.M.Qaim, G.Stoecklin) D403800100006 INSTITUTE (2GERJUL) D403800100007 REFERENCE (J,RCA,65,1,1994) D403800100008 (C,91JUELIC,,711,1991) preliminary report D403800100009 FACILITY 1(CYCLO,2SWTPSI) 4 irradiations (Ep=46 and 72 MeV) D403800100010 2(CYCLO,2GERJUL) 2 irradiations (Ep=22 MeV) D403800100011 SAMPLE Bi powder (99.999% Metal content) pressed to pellets D403800100012 and high purity Bi metal discs (99.999%). D403800100013 Light element impurities (in ppm): D403800100014 -------------------------------------------------- D403800100015 C N O D403800100016 -------------------------------------------------- D403800100017 Bi-pellet 910+/-290 106+/-7 12400+/-1100 D403800100018 Bi-disc 40+/- 20 3+/-1 31+/- 4 D403800100019 -------------------------------------------------- D403800100020 Samples were sandwiched between two catcher foils of D403800100021 the same material. D403800100022 METHOD (STTA,EDEG) Several Al and Cu foils were inserted in D403800100023 the stack as energy degrader and monitor foils. D403800100024 The beam current were measured in faraday cup and via D403800100025 monitor reactions on natural Cu and Al, and more D403800100026 reliance was attached to measurements through monitor D403800100027 reactions. D403800100028 (CHSEP) The [7Be]BeO and the [203Hg]HgS were obtained D403800100029 after a multi step chemical separation. D403800100030 The radiochemical yield was determined gravimetrically.D403800100031 The Be and Hg content of the samples were determined D403800100032 by using AES-ICP and AAFS respectively. D403800100033 The [7Be]Be0 samples were directly measured on a gamma D403800100034 detector. D403800100035 (GSPEC) The decay was followed for five hours. D403800100036 The [203Hg]HgS was measured on a low background D403800100037 shielded detector. D403800100038 The Tl-208 background peak was separated from the peak D403800100039 of 203Hg. D403800100040 1(ACTIV) PSI, Villigen D403800100041 - Primary proton energy 72 MeV and 46 MeV D403800100042 - Irradiated for 6 hr with beam current of 50 - 70 nA.D403800100043 2(ACTIV) KFA, Juelich D403800100044 - Primary energy 22 MeV D403800100045 - Irradiated for 8 hr with beam current of 70 nA. D403800100046 REL-REF (R,,C.F.Williamson+,R,CEA-12-3042,1966) D403800100047 Range-energy formula adopted for calculation of D403800100048 energy degradation D403800100049 MONITOR (29-CU-0(P,X)30-ZN-65,,SIG) D403800100050 (29-CU-0(P,X)30-ZN-62,,SIG) D403800100051 (13-AL-27(P,X)11-NA-22,,SIG) above 35 MeV D403800100052 MONIT-REF (,B.Scholten,T,SCHOLTEN,1992) D403800100053 Monitor cross sections evaluated from: D403800100054 (D0505001,A.Gruetter,J,NP/A,383,98,1982) D403800100055 (A0445003,M.Lagunas-Solar+,J,ARI,39,41,1988) D403800100056 (A0351002,V.N.Aleksandrov+,J,AE,62,411,1987) D403800100057 (A0497002,G.F.Steyn+,J,ARI,41,315,1990) D403800100058 DETECTOR (GELI) 140 cm3 HPGe detector D403800100059 ERR-ANALYS (ERR-T) The total error in the cross section was D403800100060 determined by combining all the individual errors in D403800100061 quadrature: D403800100062 (ERR-S,1.,5.) Counting statistics (1-5%) D403800100063 (ERR-1) Beam intensity (8%) D403800100064 (ERR-2) Detector efficiency (5%) D403800100065 (ERR-3,1.,7.) Decay data (1-7%) D403800100066 (EN-ERR) No information given D403800100067 HISTORY (19951010C) D403800100068 (19951112U) D403800100069 (20060730A) BIB section upgraded. Ref.corrected D403800100070 (20070707A) According to ref. units corrected in D403800100071 Subent 002. MB=>NB D403800100072 (20101007U) SD: ref.corrected: (C,91JUELIC,,753,1991)=>D403800100073 (C,91JUELIC,,711,1991) D403800100074 (20140528U) On. ANALYSIS and ADD-RES deleted. D403800100075 ENDBIB 73 0 D403800100076 NOCOMMON 0 0 D403800100077 ENDSUBENT 76 0 D403800199999 SUBENT D4038002 20140528 D094D403800200001 BIB 5 11 D403800200002 REACTION (83-BI-209(P,X)80-HG-203,,SIG) D403800200003 DECAY-DATA (80-HG-203,46.6D,DG,279.2,0.815) D403800200004 COMMENT By authors: D403800200005 - The real 7Be contribution from Bi is small, and is D403800200006 not determinable via assay of the 7Be activity. D403800200007 - Rather flat initial part gives presumably the (p,7Be)D403800200008 contribution while the rapidly increasing part above D403800200009 55 MeV is attributed to the emission of several D403800200010 nucleons (4p3n). D403800200011 STATUS (TABLE) Table 4 of Radiochim.Acta65(1994)1 D403800200012 HISTORY (20140528U) On. STATUS added, RAD-DET deleted. D403800200013 ENDBIB 11 0 D403800200014 NOCOMMON 0 0 D403800200015 DATA 4 9 D403800200016 EN EN-ERR DATA ERR-T D403800200017 MEV MEV NB NB D403800200018 30.9 0.9 74. 28. D403800200019 37.6 0.7 80. 21. D403800200020 44.2 1.6 130. 47. D403800200021 50.1 1.3 192. 44. D403800200022 54.6 1.1 224. 86. D403800200023 59.0 1.0 1694. 268. D403800200024 62.7 0.8 2324. 349. D403800200025 66.7 0.6 3549. 546. D403800200026 69.8 0.5 4064. 622. D403800200027 ENDDATA 11 0 D403800200028 ENDSUBENT 27 0 D403800299999 ENDENTRY 2 0 D403899999999