ENTRY D4036 20100304 D072D403600000001 SUBENT D4036001 20100304 D072D403600100001 BIB 13 65 D403600100002 TITLE Radiochemical studies of proton induced Be-7-emission D403600100003 reaction in the energy range of 40 to 100 MeV D403600100004 AUTHOR (B.Scholten,S.M.Qaim,G.Stoeklin) D403600100005 INSTITUTE (2GERJUL) D403600100006 REFERENCE (J,RCA,65,81,1994) D403600100007 FACILITY (CYCLO,2GERJUL)Juelich isocronous cyclotron, Juelich D403600100008 (CYCLO,2SWDUPP)Svedberg Laboratory in Uppsala D403600100009 SAMPLE targets were Al, V, Nb and Au foils. The impurities D403600100010 of the foils were given in B.Scholten et al. RCA,62, D403600100011 107,93, the light element (Li, Be, B, C, n, O) D403600100012 inpurities were also given. Cu and Al foils serve as D403600100013 monitor and enery degrader foils. Thick foils (50- D403600100014 500 micron) were place between two thin (10-25 micron) D403600100015 catcher foils of the same material. D403600100016 METHOD (ACTIV,EXTB,STTA,CHSEP)a thick stack was irradiated D403600100017 with 99 MeV protons for about 4 hours at beam current D403600100018 of 100 Na in Uppsala. Several thin stacks were irradia-D403600100019 ted in Juelich for about 12 hours with 45 MeV protons D403600100020 at a beam current of 0.5 To 2.0 Microamps. D403600100021 the energy of the primary beam in Uppsala was D403600100022 determined via measurements of ratio of activities D403600100023 from known high threshold reactions. Al-27(p,x)Na-22 D403600100024 to Al-27(p,x)Na-24 and Al-27(p,x)Na-22 to D403600100025 Cu-nat(p,x)Zn-65. D403600100026 the beam energy along the stacks was calculated D403600100027 according to the range-energy formula of C.F. D403600100028 Williamson et al. (Report CEA-R-3042, 1966) and was D403600100029 checked by flux constancy (+- 3%) the beam intensity D403600100030 was determined by Faraday cup and by using monitor D403600100031 reactions (+-12% agreement) the Al-27(p,Be-7) process D403600100032 was studied without chemical sep. Chemical sep. was D403600100033 applied in the case of V, Nb and Au foils. The D403600100034 radiochemical yield were about 85 - 97 % for the Be-7. D403600100035 MONITOR (13-AL-27(P,X)11-NA-22,,SIG) D403600100036 (13-AL-27(P,X)11-NA-24,,SIG) D403600100037 (29-CU-0(P,X)30-ZN-62,,SIG) D403600100038 (29-CU-0(P,X)30-ZN-65,,SIG) D403600100039 MONIT-REF (,A.GRUETTER+,J,NP/A,383,98,1982) D403600100040 (,M.C.LAGUNAS-SOLAR+,J,ARI,39,41,1988) D403600100041 (,G.F.STEYN+,J,ARI,41,315,1990) D403600100042 (,R.MICHEL+,J,NP/A,441,617,1985) D403600100043 (,V.N.ALEXANDROV+,J,AE,62,411,1987) D403600100044 (,B.SCHOLTEN,R,JUEL-93-2753,1993) D403600100045 ERR-ANALYS (DATA-ERR). The tot error (15 - 90%) in the cross D403600100046 section was obtained by combining all the D403600100047 individual errors in quadrature. Beam intensity: D403600100048 12%, peak area: 5-10% and up to 90% in weak samples, D403600100049 detector efficiency: 7%, chemical yield 4%. D403600100050 the presented errors are do not contain the D403600100051 uncertainties arrising from the contribution of D403600100052 the reactions on Li-7, Be-9, B-10, B-11, C-12, n-14, D403600100053 and O-16. D403600100054 authors conclusion: the contribution of impurities D403600100055 to the formation of Be-7 in the case of Al and Nb is D403600100056 within the limit of experimental error, and about D403600100057 50% for V target foils. In the case of Au samples D403600100058 the cross section are accurate within a factor of 2. D403600100059 (EN-ERR) details are not given D403600100060 ANALYSIS (AREA) D403600100061 ADD-RES investigation of systemetic trends of (p,Be-7) cross D403600100062 sections D403600100063 HISTORY (19951010C) D403600100064 (19971210U) D403600100065 (20060730A) BIB section upgrated D403600100066 (20100304D) SD: Entry deleted. Duplication with D0054. D403600100067 ENDBIB 65 0 D403600100068 NOCOMMON 0 0 D403600100069 ENDSUBENT 68 0 D403600199999 NOSUBENT D4036002 20100304 D072D403600200001 NOSUBENT D4036003 20100304 D072D403600300001 NOSUBENT D4036004 20100304 D072D403600400001 NOSUBENT D4036005 20100304 D072D403600500001 ENDENTRY 5 0 D403699999999