ENTRY C0439 20210828 C203C043900000001 SUBENT C0439001 20210828 C203C043900100001 BIB 15 57 C043900100002 INSTITUTE (1CANQU ,1CANCRC) C043900100003 REFERENCE (J,PR/C,54,1982,1996) C043900100004 (J,PRL,69,1896,1992) C043900100005 AUTHOR (J.M.L.Ouellet,M.N.Butler,H.C.Evans,H.W.Lee,J.R.Leslie,C043900100006 J.D.MacArthur,W.McLatchie,H.-B.Mak,P.Skensved, C043900100007 J.L.Whitton,X.Zhao,T.K.Alexander) C043900100008 TITLE 12C(alpha,gamma)16O cross sections at stellar energies C043900100009 FACILITY (VDG,1CANQU ) C043900100010 INC-SPECT Energy determined from the centroids of the gamma-peaksC043900100011 in 90 degree detectors and reaction Q value=7162 keV. C043900100012 The weighted average of the six values (from the full C043900100013 energy, single and double escape peaks) was typically C043900100014 20-30 keV below the center-of-mass energy deduced from C043900100015 the incident beam energy and slightly higher than the C043900100016 value at half of target thickness. C043900100017 The spread in the beam energy was less than 3 keV at C043900100018 all energies. C043900100019 SAMPLE Isotopically separated targets prepared by implanting C043900100020 12C targets at an energy of 110 keV into a thick gold C043900100021 layer. The backings were 25-mm square copper sheets, C043900100022 0.5 mm thick, on which thin layer of nickel and then C043900100023 gold were electroplated to assure good adhesion. C043900100024 A total of nine targets was eventually used. C043900100025 DETECTOR (GE-IN) Six large-volume germanium detectors situated C043900100026 at angles of 28, 60, 90, 90, 120, and 143 degr. C043900100027 distances of 5.0,5.0,3.8,3.8,6.0, and 8.0 cm. The two C043900100028 90 degr. counters were located below and above the C043900100029 target. C043900100030 (SCIN) Six plastic scintillation counters were placed C043900100031 above the germanium detector so that they subtended anC043900100032 angle of close to 2pi. C043900100033 ANALYSIS The E1 and E2 contributions were divided by target C043900100034 thickness and total charge deposited on the target to C043900100035 produce a relative yield curve. C043900100036 Data above 2 MeV are averaged over several runs at 5 C043900100037 out of 9 energies. C043900100038 MONITOR (6-C-12(A,G)8-O-16,,SIG) Normalized to total cross C043900100039 section at E c.m.=2.39 MeV of 47 nb, the average from C043900100040 previous works as determined by Redder et al. C043900100041 MONIT-REF (F0580001,A.Redder+,J,NP/A,462,385,1987) C043900100042 ERR-ANALYS Incident beam energy calibration better than 1 keV. C043900100043 ADD-RES Analysis of all the available E1 cross sections with C043900100044 the K-matrix method and with a three-level R-matrix C043900100045 method yields a consistent prediction of 79(+-16)keV-bC043900100046 for the E1 S factor at 300 keV. C043900100047 The contribution of E2 transitions at the same energy C043900100048 is 36(+-6)keV from a cluster-model analysis of the C043900100049 present data. C043900100050 The best estimate of the total S factor at 300 keV is C043900100051 120 keV-b. C043900100052 STATUS (TABLE) Data taken from tables 3 and 4 in C043900100053 Phys.Rev.C54,1982(1996) C043900100054 (APRVD) Approved by W. McLatchie, 97/1/22. C043900100055 HISTORY (19961026C) SD C043900100056 (19970127U) Author approval added. C043900100057 (20001007A) Reference added. C043900100058 (20210715A) OS. EN-NRM corrected, minor BIB changes C043900100059 ENDBIB 57 0 C043900100060 COMMON 3 3 C043900100061 EN-CM-NRM MONIT MONIT-ERR C043900100062 MEV NB NB C043900100063 2.39 47.0 3.0 C043900100064 ENDCOMMON 3 0 C043900100065 ENDSUBENT 64 0 C043900199999 SUBENT C0439002 19961105 0000C043900200001 BIB 3 7 C043900200002 REACTION (6-C-12(A,G)8-O-16,,DA) C043900200003 ANALYSIS The E1 and E2 contributions were divided by target C043900200004 thickness and total charge deposited on the target to C043900200005 produce a relative yield curve. C043900200006 ERR-ANALYS (ERR-S) Statistical uncertainty due to uncertainty C043900200007 from the normalization of the integrated cross C043900200008 sections C043900200009 ENDBIB 7 0 C043900200010 NOCOMMON 0 0 C043900200011 DATA 5 96 C043900200012 EN-CM EN-RSL ANG-CM DATA ERR-S C043900200013 KEV KEV ADEG NB/SR NB/SR C043900200014 1361.8 10.3 28. 0.06 0.02 C043900200015 1361.8 10.3 60. 0.06 0.02 C043900200016 1361.8 10.3 90. 0.05 0.01 C043900200017 1361.8 10.3 90. 0.04 0.01 C043900200018 1361.8 10.3 120. 0.03 0.02 C043900200019 1361.8 10.3 143. 0.02 0.02 C043900200020 1370.2 11.2 28. 0.03 0.03 C043900200021 1370.2 11.2 60. 0.05 0.03 C043900200022 1370.2 11.2 90. 0.04 0.02 C043900200023 1370.2 11.2 90. 0.05 0.02 C043900200024 1370.2 11.2 120. 0.03 0.03 C043900200025 1370.2 11.2 143. 0.04 0.03 C043900200026 1382.1 12.1 28. 0.03 0.02 C043900200027 1382.1 12.1 60. 0.05 0.02 C043900200028 1382.1 12.1 90. 0.03 0.01 C043900200029 1382.1 12.1 90. 0.04 0.01 C043900200030 1382.1 12.1 120. 0.03 0.02 C043900200031 1382.1 12.1 143. 0.04 0.02 C043900200032 1576.0 7.6 28. 0.07 0.03 C043900200033 1576.0 7.6 60. 0.21 0.03 C043900200034 1576.0 7.6 90. 0.11 0.02 C043900200035 1576.0 7.6 90. 0.10 0.02 C043900200036 1576.0 7.6 120. 0.04 0.03 C043900200037 1576.0 7.6 143. 0.08 0.03 C043900200038 1577.4 11.2 28. 0.08 0.04 C043900200039 1577.4 11.2 60. 0.14 0.04 C043900200040 1577.4 11.2 90. 0.08 0.03 C043900200041 1577.4 11.2 90. 0.05 0.03 C043900200042 1577.4 11.2 120. 0.11 0.04 C043900200043 1577.4 11.2 143. 0.07 0.05 C043900200044 1579.3 6.3 28. 0.08 0.02 C043900200045 1579.3 6.3 60. 0.16 0.03 C043900200046 1579.3 6.3 90. 0.13 0.02 C043900200047 1579.3 6.3 90. 0.11 0.02 C043900200048 1579.3 6.3 120. 0.05 0.02 C043900200049 1579.3 6.3 143. 0.04 0.02 C043900200050 1777.1 3.2 28. 0.17 0.03 C043900200051 1777.1 3.2 60. 0.35 0.03 C043900200052 1777.1 3.2 90. 0.24 0.02 C043900200053 1777.1 3.2 90. 0.28 0.02 C043900200054 1777.1 3.2 120. 0.13 0.03 C043900200055 1777.1 3.2 143. 0.07 0.02 C043900200056 1979. 2.8 28. 0.26 0.06 C043900200057 1979. 2.8 60. 0.96 0.08 C043900200058 1979. 2.8 90. 0.76 0.06 C043900200059 1979. 2.8 90. 0.86 0.06 C043900200060 1979. 2.8 120. 0.30 0.06 C043900200061 1979. 2.8 143. 0.17 0.05 C043900200062 2172. 2.4 28. 1.08 0.15 C043900200063 2172. 2.4 60. 2.92 0.23 C043900200064 2172. 2.4 90. 2.12 0.15 C043900200065 2172. 2.4 90. 2.54 0.16 C043900200066 2172. 2.4 120. 1.15 0.16 C043900200067 2172. 2.4 143. 0.36 0.10 C043900200068 2382.6 2.1 28. 2.78 0.32 C043900200069 2382.6 2.1 60. 7.52 0.47 C043900200070 2382.6 2.1 90. 5.58 0.33 C043900200071 2382.6 2.1 90. 5.56 0.34 C043900200072 2382.6 2.1 120. 3.23 0.33 C043900200073 2382.6 2.1 143. 0.72 0.22 C043900200074 2389.6 1.3 28. 1.91 0.24 C043900200075 2389.6 1.3 60. 5.43 0.30 C043900200076 2389.6 1.3 90. 4.71 0.23 C043900200077 2389.6 1.3 90. 5.00 0.24 C043900200078 2389.6 1.3 120. 2.39 0.24 C043900200079 2389.6 1.3 143. 1.24 0.22 C043900200080 2570. 2.0 28. 1.22 0.14 C043900200081 2570. 2.0 60. 3.79 0.23 C043900200082 2570. 2.0 90. 2.64 0.15 C043900200083 2570. 2.0 90. 3.03 0.16 C043900200084 2570. 2.0 120. 1.91 0.17 C043900200085 2570. 2.0 143. 0.96 0.12 C043900200086 2589.9 1.5 28. 1.15 0.13 C043900200087 2589.9 1.5 60. 2.67 0.16 C043900200088 2589.9 1.5 90. 2.48 0.12 C043900200089 2589.9 1.5 90. 2.67 0.13 C043900200090 2589.9 1.5 120. 1.92 0.14 C043900200091 2589.9 1.5 143. 1.09 0.11 C043900200092 2834.9 2.0 28. 0.30 0.06 C043900200093 2834.9 2.0 60. 1.01 0.07 C043900200094 2834.9 2.0 90. 0.69 0.05 C043900200095 2834.9 2.0 90. 0.80 0.05 C043900200096 2834.9 2.0 120. 0.79 0.07 C043900200097 2834.9 2.0 143. 0.50 0.06 C043900200098 2981.5 3.8 28. 0.51 0.07 C043900200099 2981.5 3.8 60. 0.33 0.07 C043900200100 2981.5 3.8 90. 0.48 0.05 C043900200101 2981.5 3.8 90. 0.48 0.05 C043900200102 2981.5 3.8 120. 0.64 0.07 C043900200103 2981.5 3.8 143. 0.85 0.08 C043900200104 2984.9 7.3 28. 0.54 0.13 C043900200105 2984.9 7.3 60. 0.85 0.12 C043900200106 2984.9 7.3 90. 0.34 0.08 C043900200107 2984.9 7.3 90. 0.50 0.08 C043900200108 2984.9 7.3 120. 0.81 0.13 C043900200109 2984.9 7.3 143. 0.74 0.13 C043900200110 ENDDATA 98 0 C043900200111 ENDSUBENT 110 0 C043900299999 SUBENT C0439003 19961105 0000C043900300001 BIB 3 5 C043900300002 REACTION 1(6-C-12(A,G)8-O-16,EP,SIG) C043900300003 2(6-C-12(A,G)8-O-16,EP,SIG,,SFC) C043900300004 ANALYSIS E2 contribution obtained from E1 and E2/E1 ratio. C043900300005 ERR-ANALYS (DATA-ERR) Does not include 6% uncertaity from the C043900300006 overall normalization. C043900300007 ENDBIB 5 0 C043900300008 NOCOMMON 0 0 C043900300009 DATA 7 18 C043900300010 POLAR EN-CM EN-RSL DATA 1DATA-ERR 1DATA 2C043900300011 DATA-ERR 2 C043900300012 NO-DIM KEV KEV NB NB B*KEV C043900300013 B*KEV C043900300014 1. 1370.3 6.4 0.29 0.06 17.1 C043900300015 3.2 C043900300016 1. 1577.9 4.5 0.85 0.09 17.3 C043900300017 1.8 C043900300018 1. 1777.1 3.2 2.18 0.17 19.5 C043900300019 1.5 C043900300020 1. 1979.0 2.8 6.87 0.43 30.5 C043900300021 1.9 C043900300022 1. 2172.0 2.4 20.5 1.2 51.3 C043900300023 2.9 C043900300024 1. 2387.7 1.1 45.2 1.8 65.6 C043900300025 2.6 C043900300026 1. 2583.1 1.2 23.2 0.9 21.9 C043900300027 0.9 C043900300028 1. 2834.8 2.0 6.4 0.4 3.67 C043900300029 0.21 C043900300030 1. 2982.2 3.4 3.1 0.3 1.36 C043900300031 0.14 C043900300032 2. 1370.3 6.4 0.20 0.07 11.7 C043900300033 4.1 C043900300034 2. 1577.9 4.5 0.36 0.10 7.3 C043900300035 2.0 C043900300036 2. 1777.1 3.2 0.42 0.16 3.8 C043900300037 1.4 C043900300038 2. 1979.0 2.8 0.22 0.36 1.0 C043900300039 1.6 C043900300040 2. 2172.0 2.4 0.90 0.88 2.3 C043900300041 2.2 C043900300042 2. 2387.7 1.1 1.8 1.2 2.6 C043900300043 1.7 C043900300044 2. 2583.1 1.2 3.0 0.6 2.8 C043900300045 0.6 C043900300046 2. 2834.8 2.0 2.06 0.36 1.18 C043900300047 0.21 C043900300048 2. 2982.2 3.4 3.87 0.38 1.72 C043900300049 0.17 C043900300050 ENDDATA 40 0 C043900300051 ENDSUBENT 50 0 C043900399999 ENDENTRY 3 0 C043999999999