ENTRY O1399 20090312 O038O139900000001 SUBENT O1399001 20090312 O038O139900100001 BIB 14 64 O139900100002 TITLE Activation measurement of the He-3(He4,g)Be-7 cross O139900100003 section at low energy. O139900100004 AUTHOR (D.Bemmerer, F.Confortola, H.Costantini, A.Formicola, O139900100005 Gy.Gyurky, R.Bonetti, C.Broggini, P.Corvisiero, O139900100006 Z.Elekes, Zs.Fulop, G.Gervino, A.Guglielmetti, O139900100007 C.Gustavino, G.Imbriani, M.Junker, M.Laubenstein, O139900100008 A.Lemut, B.Limata, V.Lozza, M.Marta, R.Menegazzo, O139900100009 P.Prati, V.Roca, C.Rolfs, C.Rossi-Alvarez, E.Somorjai,O139900100010 O.Straniero, F.Strieder, F.Terrasi, H.P.Trautvetter) O139900100011 INSTITUTE (2ITYPAD) O139900100012 (2ITYGVA) O139900100013 (2ITYLGS) O139900100014 (3HUNDEB) O139900100015 (2ITYMIL) O139900100016 (2ITYTUR) O139900100017 (2ITYNAP) O139900100018 (2GERBOC) O139900100019 (2ITYOAC) O139900100020 (2ITYFSN) O139900100021 REFERENCE (J,PRL,97,122502,2006) O139900100022 (J,NP/A,814,144,2008) O1709 O139900100023 (J,PR/C,75,065803,2007) O1516 O139900100024 REL-REF (N,O1195001,G.IMBRIANI+,J,EPJ/A,25,455,2005) Results O139900100025 of LUNA group. O139900100026 (N,O1268001,B.N.SINGH+,J,PRL,93,262503,2004) Results O139900100027 of He-3(a,g)Be-7 reaction at GSPEC-method. O139900100028 SAMPLE Enriched He-3 gas, isotopic purity more than 99.95%, O139900100029 pressure 0.7-mbar, target thickness 9-10 keV, was used.O139900100030 DETECTOR (SOLST) A 100-mum thick silicon detector detects O139900100031 projectiles that have been elastically scattered first O139900100032 in the target gas and subsequently in a movable 15- O139900100033 mug/cm**2 carbon foil. O139900100034 (HPGE) The number of Be-7 nuclei is determined by O139900100035 measuring the Be-7 activity on a Cu-catcher. O139900100036 FACILITY (ACCEL,2ITYLGS) The 400 kV LUNA accelerator. O139900100037 The beam energy is obtained from a precision resistor O139900100038 chain and have 5 eV/hour long-term stability. O139900100039 METHOD (ACTIV) O139900100040 COMMENT *By authors*.The present data are the first activation O139900100041 results at energies directly relevant to Big-Bang O139900100042 Li-7 production. O139900100043 ERR-ANALYS (ERR-1).The error in Be-7 counting efficiency is 1.8%. O139900100044 (ERR-2).The error in beam intensity is 1.5%. O139900100045 (ERR-3).The error in beam heating effect is 1.3%. O139900100046 (ERR-4).The error in target pressure and temperature O139900100047 without beam is 0.6%. O139900100048 (ERR-5).The error in Be-7 backscattering is 0.5%. O139900100049 (ERR-6).The error in incomplete Be-7 collection is O139900100050 0.4%. O139900100051 (ERR-7).The error in Be-7 distribution in catcher is O139900100052 0.4%. O139900100053 (ERR-8).The error in 478-keV gamma-ray branching is O139900100054 0.4%. O139900100055 (EN-ERR,0.5,0.8).The error in effective energy is O139900100056 0.5-0.8%. O139900100057 (ERR-SYS).The total systematics errors is 3%. See O139900100058 above. O139900100059 (ERR-S).The errors due to statistics-activity O139900100060 measurements. O139900100061 MONITOR (13-AL-27(P,G)14-SI-28,,SIG) Catcher Al for back- O139900100062 scattered Be-7. O139900100063 HISTORY (20070123C) O139900100064 (20090312A) New referene was added. O139900100065 STATUS (TABLE) O139900100066 ENDBIB 64 0 O139900100067 COMMON 8 6 O139900100068 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 O139900100069 ERR-7 ERR-8 O139900100070 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT O139900100071 PER-CENT PER-CENT O139900100072 1.8 1.5 1.3 0.6 0.5 0.4O139900100073 0.4 0.4 O139900100074 ENDCOMMON 6 0 O139900100075 ENDSUBENT 74 0 O139900199999 SUBENT O1399002 20090312 O038O139900200001 BIB 3 6 O139900200002 REACTION 1(2-HE-3(A,G)4-BE-7,,SIG,,SFC) O139900200003 2(2-HE-3(A,G)4-BE-7,,SIG,,,DERIV) O139900200004 COMMENT *By authors*.The effective center mass energy is O139900200005 calculated assuming a constant S-factor over the targetO139900200006 length. O139900200007 STATUS (SPSDD,O1709002) O139900200008 ENDBIB 6 0 O139900200009 NOCOMMON 0 0 O139900200010 DATA 5 3 O139900200011 EN-CM DATA 1ERR-S 1ERR-SYS 1DATA 2 O139900200012 KEV B*KEV PER-CENT PER-CENT MB O139900200013 126.5 0.514 2. 3. 1.87E-06 O139900200014 147.7 0.499 1.7 2.9 4.61E-06 O139900200015 168.9 0.482 2. 2.9 9.35E-06 O139900200016 ENDDATA 5 0 O139900200017 ENDSUBENT 16 0 O139900299999 ENDENTRY 2 0 O139999999999