ENTRY A0324 20021217 0000A032400000001 SUBENT A0324001 20021217 0000A032400100001 BIB 11 47 A032400100002 TITLE The E1 capture amplitude in 12-C(alpha,gamma0)16-O A032400100003 AUTHOR (L.Gialanella, D.Rogalla, F.Strieder, S.Theis, A032400100004 G.Gyurki, C.Agodi, R.Alba, M.Aliotta, L.Campajola, A032400100005 A.Del Zoppo, A.D'Onofrio, P.Figuera, U.Greife, A032400100006 G.Imbriani, A.Ordine, V.Roca, C.Rolfs, M.Romano, A032400100007 C.Sabbarese, P.Sapienza, F.Schuemann, E.Somorjai, A032400100008 F.Terrasi, H.P.Trautvetter) A032400100009 REFERENCE (J,EPJ/A,11,357,2001) A032400100010 INSTITUTE (2GERBOC) Institut fuer Physik mit Ionenstrahlen . A032400100011 (2ITYNAP) Dipartimento di Scienze Fisiche . A032400100012 (2ITYFSN) Dipartimento di Scienze Ambientali . A032400100013 (2ITYLNS) Laboratori Nazionali del Sud, INFN, Catania A032400100014 (3HUNDEB) ATOMKI A032400100015 COMMENT Abstract. An excitation function of the ground-state A032400100016 gamma0-ray capture transition in 12-C(A,G)16-O at 90 A032400100017 degree was obtained in far geometry using six Ge A032400100018 detectors, where the study of the reaction was A032400100019 initiated in inverse kinematics involving a windowless A032400100020 gas target. The detectors observed predominantly the A032400100021 E1 capture amplitude. A032400100022 The data at E =1.32 to 2.99 MeV lead to an extrapolatedA032400100023 astrophysical S factor SE1(E0)=90 +/- 15KeV*B at E0 A032400100024 =0.3 MeV (for the case of constructive interference A032400100025 between the two lowest E1 sources), in good agreement A032400100026 with previous works. However, a novel Monte-Carlo A032400100027 approach in the data extrapolation reveals systematic A032400100028 differences between the various data sets such that a A032400100029 combined analysis of all available data sets could A032400100030 produce a biased estimate of the SE1(E0) value. As a A032400100031 consequence, the case of destructive interference A032400100032 between the two lowest E1 sources with SE1(E0)=8 +/- 3 A032400100033 KeV*B cannot be ruled out rigorously. A032400100034 - By authors. Beam energy was corrected for energy lossA032400100035 in gas target. All tabulated energies are effective A032400100036 ones. A032400100037 - By compiler. The paper contains very detailed A032400100038 information for the experiment. A032400100039 SAMPLE A windowless gas target. A032400100040 DETECTOR (HPGE) Ge P-type to detect gamma - rays. A032400100041 (SIBAR) To detected elastically scattered He-4. A032400100042 FACILITY (DYNAM,2GERBOC) A032400100043 METHOD (SITA) A032400100044 (GSPEC) A032400100045 HISTORY (20020617C) A032400100046 (20021217U) Last checking has been done. A032400100047 MISC-COL (MISC) The sum of kinetic energies of projectile and A032400100048 target nuclei. A032400100049 ENDBIB 47 0 A032400100050 NOCOMMON 0 0 A032400100051 ENDSUBENT 50 0 A032400199999 SUBENT A0324002 20021217 0000A032400200001 BIB 5 12 A032400200002 REACTION (2-HE-4(6-C-12,EL)2-HE-4,,DA,,RTH) A032400200003 MONITOR (18-AR-0(6-C-12,EL)18-AR-0,,DA,,RTH) A032400200004 ERR-ANALYS (ERR-T) The uncertainties are given in data table A032400200005 without any analysis. A032400200006 (ANG-ERR) The incertainty is determined from geometry. A032400200007 COMMENT - By authors: the results have been normalised to theA032400200008 Rutherford scattering cross-section at the lowest A032400200009 energies, where the intensity ratio approached a A032400200010 constant value. The data are in good agreement with A032400200011 previous works. A032400200012 REL-REF (A,A0652002,G.ROTERS+,J,EPJ/A,6,451,1999) A032400200013 (A,,K.U.KETTNER+,J,ZP/A,308,73,1982) A032400200014 ENDBIB 12 0 A032400200015 COMMON 2 3 A032400200016 ANG ANG-ERR A032400200017 ADEG ADEG A032400200018 75. 0.3 A032400200019 ENDCOMMON 3 0 A032400200020 DATA 4 25 A032400200021 EN DATA ERR-T MISC A032400200022 MEV NO-DIM NO-DIM MEV A032400200023 4.4 1.05 0.03 1.1 A032400200024 4.9 1. 0.03 1.225 A032400200025 5.148 0.92 0.017 1.287 A032400200026 5.4 0.98 0.03 1.35 A032400200027 5.9 1.01 0.03 1.475 A032400200028 6.4 0.99 0.03 1.6 A032400200029 6.652 0.92 0.03 1.663 A032400200030 6.904 1.05 0.03 1.726 A032400200031 7.152 0.98 0.03 1.788 A032400200032 7.404 1.02 0.03 1.851 A032400200033 7.904 1.05 0.03 1.976 A032400200034 8.156 1.04 0.03 2.039 A032400200035 8.404 1.14 0.04 2.101 A032400200036 8.656 1.15 0.04 2.164 A032400200037 8.908 1.25 0.03 2.227 A032400200038 9.156 1.21 0.04 2.289 A032400200039 9.156 1.21 0.03 2.289 A032400200040 9.408 1.3 0.04 2.352 A032400200041 9.656 1.14 0.04 2.414 A032400200042 9.908 1.13 0.03 2.477 A032400200043 10.408 0.9 0.03 2.602 A032400200044 10.912 0.85 0.02 2.728 A032400200045 11.412 0.87 0.03 2.853 A032400200046 11.912 0.773 0.017 2.978 A032400200047 12.412 0.78 0.02 3.103 A032400200048 ENDDATA 27 0 A032400200049 ENDSUBENT 48 0 A032400299999 SUBENT A0324003 20021217 0000A032400300001 BIB 5 9 A032400300002 REACTION (2-HE-4(6-C-12,G)8-O-16,EP,SIG,,SFC) A032400300003 REL-REF (R,,H.W.BECKER+,J,ZP/A,305,319,1982) A032400300004 Cross section 0F 1-H-1(9-F-19,G+A)8-O-16 at 6453 KeV. A032400300005 FLAG (1.) Absolute value measured relative to A032400300006 1-H(F-19,G+A)16-O with a normalisation error of 9%, A032400300007 which is common to all data points A032400300008 ERR-ANALYS (ERR-S) The quoted uncertainties represent statistical A032400300009 errors on the relative yield curve only. A032400300010 EN-SEC (E-LVL-FIN,8-O-16) A032400300011 ENDBIB 9 0 A032400300012 COMMON 2 3 A032400300013 E-LVL-FIN POLAR A032400300014 MEV NO-DIM A032400300015 0. 1. A032400300016 ENDCOMMON 3 0 A032400300017 DATA 5 20 A032400300018 EN DATA ERR-S MISC FLAG A032400300019 MEV B*KEV B*KEV MEV NO-DIM A032400300020 5.28 0.28 0.1 1.32 A032400300021 5.904 0.8 0.13 1.476 A032400300022 7.368 3.6 0.5 1.842 A032400300023 7.732 5.4 1.2 1.933 A032400300024 8.156 9.4 1.9 2.039 A032400300025 8.864 26. 4. 2.216 A032400300026 9. 34. 4. 2.25 A032400300027 9.08 35. 7. 2.27 A032400300028 9.42 49. 5. 2.355 A032400300029 9.46 54. 1.6 2.365 1. A032400300030 9.524 49. 7. 2.381 A032400300031 9.544 45. 6. 2.386 A032400300032 9.612 51. 6. 2.403 A032400300033 9.992 34. 13. 2.498 A032400300034 10.064 34. 4. 2.516 A032400300035 10.18 18. 6. 2.545 A032400300036 10.36 21. 4. 2.59 A032400300037 11.172 6.9 0.7 2.793 A032400300038 11.748 4.9 0.9 2.937 A032400300039 11.968 3.2 0.6 2.992 A032400300040 ENDDATA 22 0 A032400300041 ENDSUBENT 40 0 A032400399999 ENDENTRY 3 0 A032499999999