ENTRY O2521 20210320 O084O252100000001 SUBENT O2521001 20210320 O084O252100100001 BIB 14 71 O252100100002 TITLE Underground experimental study finds no evidence of O252100100003 low-energy resonance in the Li6(p,gamma)Be7 reaction O252100100004 AUTHOR (D.Piatti, T.Chillery, R.Depalo, M.Aliotta, O252100100005 D.Bemmerer, A.Best, A.Boeltzig, C.Broggini, C.G.Bruno,O252100100006 A.Caciolli, F.Cavanna, G.F.Ciani, P.Corvisiero, O252100100007 L.Csedreki, T.Davinson, A.Di Leva, Z.Elekes, O252100100008 F.Ferraro, E.M.Fiore, A.Formicola, Zs.Fueloep, O252100100009 G.Gervino, A.Gnech, A.Guglielmetti, C.Gustavino, O252100100010 Gy.Gyuerky, G.Imbriani, M.Junker, I.Kochanek, O252100100011 M.Lugaro, L.E.Marcucci, P.Marigo, E.Masha, O252100100012 R.Menegazzo, V.Mossa, F.R.Pantaleo, V.Paticchio, O252100100013 R.Perrino, P.Prati, L.Schiavulli, K.Stoeckel, O252100100014 O.Straniero, T.Szuecs, M.P.Takacs, S.Zavatarelli) O252100100015 INSTITUTE (2ITYUPV,2UK EDG,2GERZFK,2ITYNAP,2ITYLGS,2ITYPAD, O252100100016 2ITYGVA,3HUNDEB,2ITYBAU,2ITYTUR,2ITYMIL,3HUNELU, O252100100017 3HUNTBP,2GERDRE,2ITYOAC) O252100100018 (2ITYITY) Gran Sasso Science Institute, L'Aquila, O252100100019 Italy O252100100020 (2ITYITY) INFN, Sezione di Roma, 00185 Roma, Italy O252100100021 (2ITYITY) INFN, Sezione di Pisa, 56127 Pisa, Italy O252100100022 (3HUNHUN) Konkoly Observatory, Research Centre for O252100100023 Astronomy and Earth Sciences, 1121 Budapest, Hungary O252100100024 (2ITYITY) Universita degli Studi di Pisa, Pisa, Italy O252100100025 REFERENCE (J,PR/C,102,052802(R),2020) O252100100026 #doi:10.1103/PhysRevC.102.052802 O252100100027 FACILITY (CCW,2ITYLGS) LUNA-400 kV accelerator. O252100100028 A copper pipe extended to a distance of 1 cm from the O252100100029 target and had a dual function: it was cooled to O252100100030 liquid nitrogen temperature to serve as a cold trap, O252100100031 and it was biased to -300 V for secondary electron O252100100032 suppression. O252100100033 The 6Li-enriched solid target, tilted at 55 degrees O252100100034 with respect to the beam direction. O252100100035 SAMPLE (3-LI-6,ENR=0.95) Three targets (of thicknesses O252100100036 100-200 ug/cm2) were made using 6Li2WO4 powder and O252100100037 one target (thickness 20 ug/cm2) was made using 6Li2O O252100100038 powder and evaporated on tantalum disks (of thickness O252100100039 0.25 mm and diameter 42 mm) O252100100040 DETECTOR (HPGE) A high-purity germanium detector of 104% O252100100041 relative efficiency positioned at 1.7 cm from the O252100100042 target and at 55 degrees with respect to the beam O252100100043 direction. O252100100044 (SI) A silicon detector for detection of the alpha and O252100100045 3He particles from 6Li(p,alpha)3He reaction. O252100100046 MONITOR (3-LI-6(P,HE3)2-HE-4,,SIG,,SFC) O252100100047 MONIT-REF (O1590003,J.Cruz+,J,JP/G,35,014004,2008) O252100100048 The parametrization of the experimental 6Li(p,alpha)3HeO252100100049 S-factor given in J. Cruz, Experimental study of protonO252100100050 induced nuclear reactions in 6,7Li, Ph.D. thesis, O252100100051 Universidade Nova de Lisboa, 2006 adopted. O252100100052 METHOD (BCINT,GSPEC,ASPEC) O252100100053 CORRECTION The measured S-factors were corrected for electron O252100100054 screening, using the adiabatic approximation and a O252100100055 screening potential Ue = 273 eV. O252100100056 ERR-ANALYS (ERR-1) uncertainty due to the relative geometry of O252100100057 the beam spot and the two detectors - 6% O252100100058 (ERR-SYS) Systematic error due to: O252100100059 (ERR-2) uncertainty on the charged-particle detection O252100100060 efficiency - 8% O252100100061 (ERR-3) uncertainty on the gamma-ray detection O252100100062 efficiency - 4% O252100100063 (ERR-4) uncertainty on the gamma-ray angular O252100100064 distribution correction factor - 3% O252100100065 (ERR-5,,4.) uncertainty on the alpha particles O252100100066 angular distribution correction factor O252100100067 (MONIT-ERR) 6Li(p,alpha)3He S-factor uncertainty - 5% O252100100068 (ERR-S) Statistical uncertainty. O252100100069 STATUS (TABLE) Numerical data received from D.Piatti. O252100100070 (APRVD) Proofread by D.Piatti. O252100100071 HISTORY (20210320R) Data received from R.Depalo. O252100100072 (20210320C) VS O252100100073 ENDBIB 71 0 O252100100074 COMMON 5 3 O252100100075 ERR-1 ERR-2 ERR-3 ERR-4 MONIT-ERR O252100100076 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT O252100100077 6. 8. 4. 3. 5. O252100100078 ENDCOMMON 3 0 O252100100079 ENDSUBENT 78 0 O252100199999 SUBENT O2521002 20210320 O084O252100200001 BIB 3 3 O252100200002 REACTION (3-LI-6(P,G)4-BE-7,,SIG,,SFC) O252100200003 MISC-COL (MISC) Ratio S screened/S bare O252100200004 STATUS Plotted on Fig. 3 of Phys.Rev.C102(2020)052802(R) O252100200005 ENDBIB 3 0 O252100200006 NOCOMMON 0 0 O252100200007 DATA 5 33 O252100200008 EN-CM DATA ERR-S ERR-SYS MISC O252100200009 KEV B*EV PER-CENT PER-CENT NO-DIM O252100200010 60.9 92.0 2.3 11.9 1.025 O252100200011 67.9 88.7 1.4 11.4 1.021 O252100200012 75.4 87.2 1.2 11.2 1.018 O252100200013 81.8 90.9 0.9 11.7 1.016 O252100200014 88.7 87.7 0.8 11.3 1.014 O252100200015 103.1 86.6 0.6 11.2 1.011 O252100200016 110.7 96.6 1.6 12.4 1.010 O252100200017 116.7 77.5 0.7 10.0 1.009 O252100200018 122.0 78.7 1.1 10.1 1.009 O252100200019 131.1 76.0 0.8 9.8 1.008 O252100200020 146.5 74.5 0.8 9.6 1.007 O252100200021 149.8 77.2 0.8 9.9 1.006 O252100200022 154.2 76.2 0.8 9.8 1.006 O252100200023 161.8 78.9 0.5 10.2 1.006 O252100200024 166.2 77.0 0.7 9.9 1.006 O252100200025 171.0 74.1 0.5 9.5 1.005 O252100200026 181.6 74.8 0.5 9.6 1.005 O252100200027 191.3 75.9 0.4 9.8 1.004 O252100200028 201.2 75.0 0.6 9.7 1.004 O252100200029 210.6 74.4 0.6 9.6 1.004 O252100200030 221.8 74.3 0.4 9.6 1.004 O252100200031 226.3 72.0 0.3 9.3 1.003 O252100200032 236.8 70.8 0.4 9.1 1.003 O252100200033 244.1 73.5 0.6 9.5 1.003 O252100200034 254.5 73.3 0.6 9.5 1.003 O252100200035 262.7 74.4 0.8 9.6 1.003 O252100200036 272.0 75.1 1.9 9.7 1.003 O252100200037 280.0 73.6 2.0 9.5 1.003 O252100200038 288.6 72.8 5.7 9.4 1.002 O252100200039 297.5 72.5 0.8 9.3 1.002 O252100200040 306.5 71.2 0.9 9.2 1.002 O252100200041 314.4 70.2 3.1 9.0 1.002 O252100200042 324.6 73.3 2.4 9.4 1.002 O252100200043 ENDDATA 35 0 O252100200044 ENDSUBENT 43 0 O252100299999 ENDENTRY 2 0 O252199999999