ENTRY C2268 20170803 C170C226800000001 SUBENT C2268001 20170803 C170C226800100001 BIB 11 34 C226800100002 TITLE Re-measurement of the 33S(alpha,p)36Cl cross section C226800100003 for early solar system nuclide enrichment C226800100004 AUTHOR (T.Anderson,M.Skulski,A.Clark,A.Nelson,K.Ostdiek, C226800100005 P.Collon,G.Chmiel,T.Woodruff,M.Caffee) C226800100006 INSTITUTE (1USANOT,1USAPUR) C226800100007 REFERENCE (J,PR/C,96,015803,2017) C226800100008 REL-REF (O,C1968002,M.Bowers+,J,PR/C,88,065802,2013) C226800100009 Earlier measurement in different energy range C226800100010 FACILITY (VDGT,1USANOT) The experiment was performed at the C226800100011 Nuclear Science Laboratory at Notre Dame with the FN C226800100012 Tandem Van de Graaff accelerator C226800100013 SAMPLE Gas cell filled with 10 Torr of 4He C226800100014 DETECTOR (MAGSP) Amount of produced reoiled 36Cl nuclei were C226800100015 determined by AMS performed at Purdue's Rare Isotope C226800100016 Measurement (PRIME) Laboratory C226800100017 METHOD After passing through the entrance foil, the 33S C226800100018 beam reacted along the length of the gas-filled C226800100019 volume and forward-recoiled 36Cl atoms were stopped C226800100020 in a 0.25 mm thick Al foil at the back of the gas C226800100021 cell. SRIM simulations shown that, for all energies, C226800100022 more than 99% of recoils are caught in the 9 cm C226800100023 diameter circular cross section of the foil. C226800100024 (CHSEP) After irradiation chemical separation was C226800100025 performed with overal efficienfy of 97.5%. C226800100026 (AMS) Atomic mass spectroscopy was used to determine C226800100027 number of 36Cl nuclei produced. The AMS measurements C226800100028 were normalized to the 36Cl standard material KNSTD500.C226800100029 ERR-ANALYS (ERR-1) Syst. uncertainty in number of incident ions C226800100030 (ERR-2) Syst. uncertainty in number in number of Cl C226800100031 carrier atoms C226800100032 (ERR-3) Syst. uncertainty in 4He target density C226800100033 (ERR-4,3.,5.) Systematic uncertainty in 36Cl/Cl ratio C226800100034 (ERR-T) Total uncertainty C226800100035 HISTORY (20170803C) Compiled by S.H. C226800100036 ENDBIB 34 0 C226800100037 COMMON 3 3 C226800100038 ERR-1 ERR-2 ERR-3 C226800100039 PER-CENT PER-CENT PER-CENT C226800100040 2. 1. 2. C226800100041 ENDCOMMON 3 0 C226800100042 ENDSUBENT 41 0 C226800199999 SUBENT C2268002 20170803 C170C226800200001 BIB 3 4 C226800200002 REACTION ((2-HE-4(16-S-33,P)17-CL-36,,SIG,,AV)= C226800200003 (16-S-33(A,P)17-CL-36,,SIG,,AV)) C226800200004 STATUS (TABLE) Data taken from tab.4 of the reference C226800200005 DECAY-DATA (17-CL-36,0.301E+6YR) C226800200006 ENDBIB 4 0 C226800200007 NOCOMMON 0 0 C226800200008 DATA 4 7 C226800200009 EN-MIN EN-MAX DATA ERR-T C226800200010 MEV/A MEV/A MB MB C226800200011 0.78 0.86 0.03 0.02 C226800200012 1.00 1.08 1.36 0.07 C226800200013 1.00 1.08 1.40 0.07 C226800200014 1.15 1.23 4.8 0.02 C226800200015 1.15 1.23 4.6 0.02 C226800200016 1.37 1.45 23. 1. C226800200017 1.44 1.52 31. 2. C226800200018 ENDDATA 9 0 C226800200019 ENDSUBENT 18 0 C226800299999 ENDENTRY 2 0 C226899999999