ENTRY C2708 20220121 C214C270800000001 SUBENT C2708001 20220121 C214C270800100001 BIB 9 30 C270800100002 TITLE Measurement of the 17O(p,alpha)14N cross section at C270800100003 stellar energies C270800100004 AUTHOR (J.C.Blackmon,A.E.Champagne,M.A.Hofstee,M.S.Smith, C270800100005 R.G.Downing,G.P.Lamaze) C270800100006 INSTITUTE (1USANCA,1USATNL,1USAORL,1USANIS) C270800100007 REFERENCE (J,PRL,74,2642,1995) C270800100008 #doi:10.1103/PhysRevLett.74.2642 C270800100009 FACILITY (ACCEL,1USATNL) The experiment was performed at the C270800100010 Triangle Universities Nuclear Laboratory using an C270800100011 unpolarized beam from the TUNL atomic-beam polarized C270800100012 ion source. Beam currents on target of 400-450 mu-A C270800100013 were sustained throughout the experiment. C270800100014 SAMPLE The (Ta)2(O)5 targets of natural isotopic composition C270800100015 were used for background measurement. C270800100016 The (Ta)2(O)5 targets were produced by oxidation of C270800100017 0.1 mm tantalum (99.99%) sheets in an oxygen atmosphereC270800100018 enriched to 77% 17O. C270800100019 (8-O-17,ENR=0.77). C270800100020 DETECTOR (SI) Six implanted silicon detectors, with active C270800100021 areas of 3.1 cm2, and with no metal electrical C270800100022 contacts on their front faces, were used to detect C270800100023 outgoing alphas. C270800100024 The gains of the detectors were calibrated using the C270800100025 reactions 10B(p,alpha)7Be and 6Li(p,alpha)3He. C270800100026 CORRECTION The background was subtracted from the data. The C270800100027 background in the spectrum arises from several C270800100028 sources: cosmic rays, natural radioactivity, elastic C270800100029 protons, and the nuclear reactions 10B(p,alpha)7Be, C270800100030 7Li(p,alpha)4He, and 6Li(p,alpha)3He. C270800100031 HISTORY (20220121C) OG C270800100032 ENDBIB 30 0 C270800100033 NOCOMMON 0 0 C270800100034 ENDSUBENT 33 0 C270800199999 SUBENT C2708002 20220121 C214C270800200001 BIB 4 7 C270800200002 REACTION 1(8-O-17(P,0),,EN) C270800200003 2(8-O-17(P,A),,WID) C270800200004 STATUS (TABLE) Text on p.2645 in Phys.Rev.Lett.,74,2642,1995 C270800200005 ANALYSIS Parameters obtained by R-matrix fit C270800200006 ERR-ANALYS (ERR-S) Statistical uncertainty C270800200007 (ERR-1) Target uncertainty C270800200008 (ERR-2) Beam uncertainty C270800200009 ENDBIB 7 0 C270800200010 NOCOMMON 0 0 C270800200011 DATA 6 1 C270800200012 DATA 1DATA 2ERR-S ERR-1 +ERR-2 -ERR-2 C270800200013 KEV NANO-EV NANO-EV NANO-EV NANO-EV NANO-EV C270800200014 70. 22. 3. 2. 2. 1. C270800200015 ENDDATA 3 0 C270800200016 ENDSUBENT 15 0 C270800299999 ENDENTRY 2 0 C270899999999