ENTRY A0406 20021217 0000A040600000001 SUBENT A0406001 20021217 0000A040600100001 BIB 11 32 A040600100002 TITLE Subthreshold resonance in the 6-Li(D,A)4-He reaction A040600100003 and its astrophysical implications A040600100004 AUTHOR (K.Czerski, A.Huke, H.Bucka, P.Heide, G.Ruprecht, A040600100005 B.Unrau) A040600100006 REFERENCE (J,PR/C,55,1517,1997) A040600100007 INSTITUTE (2GERTUB) Institut fuer strahlungs - und kernphysik A040600100008 COMMENT Abstract.-The total cross section of the 6-Li(D,A)4-He A040600100009 reaction has been measured for deuteron energies A040600100010 between 50 and 180 KeV. From a detailed distorted-waveA040600100011 born approximation analysis of the angular A040600100012 distributions and the excitation function up to 1 MeV A040600100013 it was possible to determine the strength of a A040600100014 subthreshold resonance that dominates the cross sectionA040600100015 at sub-coulomb energies and contributes significantly A040600100016 to the increase of the astrophysical S factor at low A040600100017 energies. Consequently the electron screening energy A040600100018 we have determined for the 6Li(D,A)4He reaction is A040600100019 considerably smaller than the value given in previous A040600100020 works which overestimate the theoretical predictions. A040600100021 In addition the stellar reaction rate has been A040600100022 calculated up to a temperature of T9=3. A040600100023 SAMPLE Thin 6-Li-F target, 10 micro-gramm/cm**2 on a same A040600100024 carbon backing, corresponding to 2-3 KeV deutron energyA040600100025 loss. A040600100026 FACILITY (CCW,2GERTUB) A040600100027 METHOD (BCINT) A040600100028 ERR-ANALYS (ERR-T) The uncertainties are shown on figure without A040600100029 any analysis A040600100030 HISTORY (20020708C) A040600100031 (20021217U) Last checking has been done. A040600100032 ADD-RES (COMP) DWBA calculation A040600100033 2. Screening energy was determined as 130 +/- 20 eV A040600100034 ENDBIB 32 0 A040600100035 NOCOMMON 0 0 A040600100036 ENDSUBENT 35 0 A040600199999 SUBENT A0406002 20021217 0000A040600200001 BIB 7 9 A040600200002 REACTION (3-LI-6(D,A)2-HE-4,,SIG,,SFC) From figure 8 A040600200003 PART-DET (A) A040600200004 ANALYSIS (INTAD) An isotropic angular distribution was assumed A040600200005 STATUS (CURVE) By CAJAD from figure 8 A040600200006 ERR-ANALYS (EN-ERR) Data point reader uncertainty A040600200007 COMMENT - By compiler.-The attempt to scan three data points A040600200008 from figure 3 at E-Cm > 151 KeV was unsuccessful. A040600200009 MISC-COL (MISC) The sum of kinetic energies of beam and target A040600200010 particle in C.-M. System A040600200011 ENDBIB 9 0 A040600200012 COMMON 1 3 A040600200013 EN-ERR A040600200014 KEV A040600200015 0.5 A040600200016 ENDCOMMON 3 0 A040600200017 DATA 4 10 A040600200018 EN DATA ERR-T MISC A040600200019 KEV B*MEV B*MEV KEV A040600200020 88. 18.7 2.1 66. A040600200021 100. 17.6 1.7 75. A040600200022 111.2 18.7 2.2 83.4 A040600200023 122.9 14.7 1.2 92.2 A040600200024 134.9 13.9 1. 101.2 A040600200025 157.1 16.7 1.8 117.8 A040600200026 168.7 17.7 1.9 126.5 A040600200027 180.5 14.4 1.6 135.4 A040600200028 190.3 15.7 1.7 142.7 A040600200029 202.1 13.7 1.6 151.6 A040600200030 ENDDATA 12 0 A040600200031 ENDSUBENT 30 0 A040600299999 ENDENTRY 2 0 A040699999999