ENTRY C1959 20121119 C124C195900000001 SUBENT C1959001 20121119 C124C195900100001 BIB 11 41 C195900100002 TITLE Direct measurement of the 16O(a,g)20Ne reaction at C195900100003 Ec.m. = 2.43 MeV and 1.69 MeV C195900100004 AUTHOR (U.Hager,L.Buchmann,B.Davids,J.Fallis,U.Greife, C195900100005 D.A.Hutcheon,D.Irvine,D.Ottewell,A.Rojas,S.Reeve, C195900100006 C.Ruiz) C195900100007 INSTITUTE (1USACSM,1CANTMF,1CANMCM) C195900100008 REFERENCE (J,PR/C,86,055802,2012) C195900100009 FACILITY (LINAC,1CANTMF) Measurements were conducted at the C195900100010 ISAC facility at TRIUMF, using DRAGON recoil separator C195900100011 SAMPLE Windowless gas target was filled with 4He maintained C195900100012 at a central pressure of 7.7 Torr, the effective C195900100013 target length was 12.3+-5 cm C195900100014 DETECTOR (SPEC) 20Ne ions produced in the reaction were C195900100015 detected after separation from the beam using a C195900100016 two-stage electromagnetic separator with an angular C195900100017 acceptance of 21 mrad for reactions at the center of C195900100018 the target. The separator was tuned in such a way, thatC195900100019 only the 4+ charge state was transmitted C195900100020 (IOCH) An ionization chamber placed in the focal C195900100021 plane of the electromagnetic separator was used to C195900100022 detect 20Ne recoils from the reaction. C195900100023 (MCPLT) Two microchannel plates upstream of the C195900100024 ionization chamber were used to measure the C195900100025 time-of-flight across the 59 cm distance between C195900100026 them. The transmission through the microchannel C195900100027 plates setup was 85+-5%. C195900100028 (BGO) An array of 30 bismuth germanate gamma-ray C195900100029 detectors in a tight geometry was used to detect C195900100030 capture gamma rays C195900100031 METHOD (COINC) Coincidence between recoiling 20Ne ions and C195900100032 gamma rays was used to reduce background C195900100033 (TOF) Time of flight was used to identify the C195900100034 recoiling nuclei. C195900100035 Inverse kinematics was used. C195900100036 INC-SOURCE The Supernanogan off-line ion source was used to C195900100037 produce 16O beam. C195900100038 CORRECTION Correction for transmission of 4+ charge state was C195900100039 made. Distribution of charge states of neon after C195900100040 passing through helium was measured for this purpose. C195900100041 20Ne beam was also produced in Supernanogun C195900100042 HISTORY (20121119C) Compiled by S.H. C195900100043 ENDBIB 41 0 C195900100044 NOCOMMON 0 0 C195900100045 ENDSUBENT 44 0 C195900199999 SUBENT C1959002 20121119 C124C195900200001 BIB 3 6 C195900200002 REACTION ((2-HE-4(8-O-16,G)10-NE-20,,SIG,,SFC)= C195900200003 (8-O-16(A,G)10-NE-20,,SIG,,SFC)) C195900200004 STATUS (TABLE) data taken from text, page 5,6,7 of C195900200005 the reference C195900200006 ERR-ANALYS (ERR-S) Statistical uncertainty C195900200007 (ERR-SYS) Systematic uncertainty C195900200008 ENDBIB 6 0 C195900200009 NOCOMMON 0 0 C195900200010 DATA 4 3 C195900200011 EN-CM DATA ERR-S ERR-SYS C195900200012 MEV B*MEV B*MEV B*MEV C195900200013 1.694 5.00 0.22 0.58 C195900200014 2.345 1.35 0.07 0.51 C195900200015 2.426 78.0 1.0 13.0 C195900200016 ENDDATA 5 0 C195900200017 ENDSUBENT 16 0 C195900299999 SUBENT C1959003 20121119 C124C195900300001 BIB 3 5 C195900300002 REACTION ((2-HE-4(8-O-16,G)10-NE-20,PAR,SIG,,SFC)= C195900300003 (8-O-16(A,G)10-NE-20,PAR,SIG,,SFC)) C195900300004 STATUS (TABLE) Data taken from text page 6 of the reference C195900300005 ERR-ANALYS (ERR-S) Statistical uncertainty C195900300006 (ERR-SYS) Systematic uncertainty C195900300007 ENDBIB 5 0 C195900300008 COMMON 1 3 C195900300009 EN-CM C195900300010 MEV C195900300011 1.649 C195900300012 ENDCOMMON 3 0 C195900300013 DATA 4 2 C195900300014 E-LVL DATA ERR-S ERR-SYS C195900300015 MEV B*MEV B*MEV B*MEV C195900300016 0.00 0.55 0.03 0.26 C195900300017 4.248 4.45 0.19 0.58 C195900300018 ENDDATA 4 0 C195900300019 ENDSUBENT 18 0 C195900399999 SUBENT C1959004 20121119 C124C195900400001 BIB 3 4 C195900400002 REACTION 1(2-HE-4(8-O-16,G),PAR,WID) C195900400003 2(8-O-16(A,G),PAR,WID/STR) C195900400004 STATUS (TABLE) Data taken from text tab.2 of the reference C195900400005 ERR-ANALYS (DATA-ERR) no information given C195900400006 ENDBIB 4 0 C195900400007 COMMON 1 3 C195900400008 EN-RES-CM C195900400009 MEV C195900400010 2.426 C195900400011 ENDCOMMON 3 0 C195900400012 DATA 7 5 C195900400013 E-LVL DATA-CM 1DATA-ERR 1DATA-MAX 1DATA-CM 2DATA-ERR 2C195900400014 DATA-MAX 2 C195900400015 MEV MILLI-EV MILLI-EV MILLI-EV MILLI-EV MILLI-EV C195900400016 MILLI-EV C195900400017 0.0 1.28 0.37 0.18 0.05 C195900400018 C195900400019 1.634 1.58 0.47 0.23 0.07 C195900400020 C195900400021 4.248 6.22 1.37 0.89 0.20 C195900400022 C195900400023 4.967 0.79 0.42 0.11 0.06 C195900400024 C195900400025 5.788 0.35 C195900400026 0.05 C195900400027 ENDDATA 14 0 C195900400028 ENDSUBENT 27 0 C195900499999 ENDENTRY 4 0 C195999999999