ENTRY F0502 20200617 F078F050200000001 SUBENT F0502001 20200617 F078F050200100001 BIB 11 47 F050200100002 TITLE Low-energy measurement of the 7Be(p,g)8B cross section.F050200100003 AUTHOR (F.Hammache,G.Bogaert,P.Aguer,C.Angulo,S.Barhoumi, F050200100004 L.Brillard,J.F.Chemin,G.Claverie,A.Coc,M.Hussonnois, F050200100005 M.Jacotin,J.Kiener,A.Lefebvre,C.Le Naour,S.Ouichaoui, F050200100006 J.N.Scheurer,V.Tatischeff,J.P.Thibaud, F050200100007 E.Virassamynaiken) F050200100008 INSTITUTE (2FR CSN,2FR BOR,2BLGLVN,3ALGUHB) F050200100009 REFERENCE (J,PRL,86,3985,2001) F050200100010 (J,NP/A,688,273,2001) same value F050200100011 FACILITY (ACCEL,2FR CSN) F050200100012 DETECTOR (SIBAR)Alpha particles with energies below 3.5 MeV and F050200100013 emission angles between approximately 95 and 150 degr. F050200100014 with respect to the beam direction were deflected F050200100015 towards the solenoid axis and detected in an array of F050200100016 6*4 Si detectors (22 mm*45 mm*0.1 mm).The detectors F050200100017 were mounted in cylindrical geometry (internal diameterF050200100018 of 4 cm) aligned on the solenoid axis. Alpha particles F050200100019 were detected at distances ranging from 18 to 36.5 cm F050200100020 from the target. F050200100021 (SCIN)Beta particles (Emax=14 MeV) were detected in F050200100022 a set of 6 successive cylindrical plastic scintillatorsF050200100023 (diameter 20 mm and thickness 3,3,8,8,8 and 10 mm) F050200100024 centered on the field axis and 22 cm away from the F050200100025 target. F050200100026 The solenoidal superconducting magnet SOLENO F050200100027 (3.2 T at the center,1.22 m long,32 cm of internal F050200100028 diameter) in order to detect both alpha and beta F050200100029 particles with high efficiency (11.5% and 25%, F050200100030 respectively) due to the focusing power of the field. F050200100031 Off-beam detection was necessary to avoid any F050200100032 contamination in both alpha and beta+ coincidence F050200100033 spectra arising from the channel F050200100034 7Li(p,gamma1)8Be*(2alpha). F050200100035 The calibration of the silicon detectors was performed F050200100036 using the three well-defined peaks observed in the F050200100037 singlesprompt spectra from 9Be(p,d)8Be and F050200100038 9Be(p,alpha)6Li reactions. F050200100039 METHOD (GSPEC,TOF) F050200100040 SAMPLE Highly radioactive 7Be target (132 mCi). F050200100041 CORRECTION Kinematics correction of 9.6% was applied to the F050200100042 experimental efficiency value to take into account the F050200100043 8Be* in flight decay in the 7Li(p,g1)8Be* reaction. F050200100044 ERR-ANALYS Uncertainty on the effective energy is 2.5 keV. F050200100045 (DATA-ERR) No information about source of energy F050200100046 HISTORY (20041221C) F050200100047 (20200617U) SD: Ref. was added. Small update in F050200100048 Subent 002. MONITOR deleted (info moved to DETECTOR). F050200100049 ENDBIB 47 0 F050200100050 NOCOMMON 0 0 F050200100051 ENDSUBENT 50 0 F050200199999 SUBENT F0502002 20200617 F078F050200200001 BIB 3 4 F050200200002 REACTION (4-BE-7(P,G)5-B-8,,SIG,,SFC) F050200200003 STATUS (TABLE) text on pp.3987-3988 of Phys.Rev.Lett., F050200200004 86(2001)3985 F050200200005 HISTORY (20200617U) SD: STATUS updated. Numerical data revised.F050200200006 ENDBIB 4 0 F050200200007 NOCOMMON 0 0 F050200200008 DATA 3 4 F050200200009 EN-CM DATA DATA-ERR F050200200010 KEV B*EV B*EV F050200200011 0.0 18.8 1.7 F050200200012 111.7 15.8 2.7 F050200200013 134.7 19.5 3.1 F050200200014 185.8 17.2 2.1 F050200200015 ENDDATA 6 0 F050200200016 ENDSUBENT 15 0 F050200299999 ENDENTRY 2 0 F050299999999