ENTRY E1933 20100514 E062E193300000001 SUBENT E1933001 20100514 E062E193300100001 BIB 12 58 E193300100002 TITLE Measurement of the 8Li(alpha,n)11B reaction cross E193300100003 sections of astrophysical interest E193300100004 AUTHOR (H.Ishiyama, T.Hashimoto, T.Ishikawa, Y.X.Watanabe, E193300100005 S.K.Das, H.Miyatakea, Y.Mizoi, T.Fukuda, M.-H.Tanaka, E193300100006 Y.Fuchi, N.Yoshikawa, Y.Hirayama, S.C.Jeong, T.Nomura, E193300100007 I.Katayama, S.Mitsuoka, K.Nishio, M.Matsuda, P.K.Saha, E193300100008 S.Ichikawa, H.Ikezoe, T.Furukawa, H.Izumi, T.Shimoda, E193300100009 K.Nakai) E193300100010 INSTITUTE (2JPNKEK) Institute of Particle and Nuclear Studies E193300100011 (2JPNSUT) Faculty of Science and Technology E193300100012 (2JPNJPN) Laboratory of Physics, Osaka E193300100013 Electro-Communication Univ., Neyagawa E193300100014 (2JPNJAE) Advanced Science Research Center E193300100015 (2JPNJAE) Tokai Research and Development Center E193300100016 (2JPNOSA) Graduate School of Science E193300100017 REFERENCE (J,PL/B,640,(3),82,200609) E193300100018 Main reference. See also TITLE and AUTHOR. E193300100019 (J,NP/A,746,330,200412) E193300100020 T.Hashimoto+, Proc. of the 6th International E193300100021 Conference on Radioactive Nuclear Beams (RNB6) E193300100022 (J,NP/A,738,(1-4),401,200406) E193300100023 H.Miyatake+, Proc. of the 8th International Conference E193300100024 on Clustering Aspects of Nuclear Structure and E193300100025 Dynamics (CLUSTER'03) E193300100026 PART-DET (N,5-B-11) E193300100027 INC-SOURCE - Beam intensity: Yield of 8Li at the focal plane of E193300100028 recoil mass separator was 4.8 x 10**3 Hz per 3.3 pnA E193300100029 7Li-beam at 24 MeV. E193300100030 - Ion source: The purity of 8Li-beam was 99%. E193300100031 SAMPLE - Chemical-form of target: He+CO2 (10%) E193300100032 - Physical-form of target is gas. E193300100033 METHOD (COINC) Detect neutron and 11B in coincidence. E193300100034 (TOF) For the determination of the energy of 8Li-beam E193300100035 and for detecting neutrons E193300100036 FACILITY (VDGT,2JPNJAE) Secondary beam produced via the E193300100037 9Be(7Li, 8Li) reaction, where a 42 E193300100038 micro-m thick 9Be foil was used as a E193300100039 production target. E193300100040 (PRJFS,2JPNJAE) Recoil Mass Separator (RMS) E193300100041 DETECTOR Efficiency: The overall efficiency of the present E193300100042 system is about 10%. E193300100043 (IOCH,PROPC) Multiple-sampling and tracking E193300100044 proportional chamber (MSTPC) [Y. Mizoi et E193300100045 al., Nucl. Instrum. Meth. A431(1999)112] E193300100046 used to measure reaction energies of E193300100047 8Li-beam and three-dimensional tracks of E193300100048 multiple charged particles and their E193300100049 energy losses along their trajectories. E193300100050 The detection efficiency is about 100 %. E193300100051 (SCIN,PPAC) To measure TOF of neutrons. Solid angle is E193300100052 31.4% of 4-pi. Absolute efficiency was E193300100053 calibrated with a 252Cf fission source and E193300100054 it was about 40% at 5.0 MeV. E193300100055 ERR-ANALYS (ERR-SYS) Total systematic uncertainty (about 10%) E193300100056 HISTORY (20050510R) Received by e-mail from T.Hashimoto E193300100057 (20050715C) Kc + On E193300100058 (20061004A) On. REFERENCE: NP/A,738 added E193300100059 (20100223A) Nf. REFERENCE: PL/B,640 added E193300100060 ENDBIB 58 0 E193300100061 COMMON 1 3 E193300100062 ERR-SYS E193300100063 PER-CENT E193300100064 10. E193300100065 ENDCOMMON 3 0 E193300100066 ENDSUBENT 65 0 E193300199999 SUBENT E1933002 20100514 E062E193300200001 BIB 5 16 E193300200002 REACTION ((2-HE-4(3-LI-8,N)5-B-11,,SIG)= E193300200003 (3-LI-8(A,N)5-B-11,,SIG)) E193300200004 ERR-ANALYS (ERR-S) Statistical uncertainty E193300200005 REL-REF (N,F0076002,T.Paradellis+,J,ZP/A,337,211,1990) E193300200006 Present data indicates roughly 4-5 times larger than E193300200007 this work E193300200008 (N,E1644002,R.N.Boyd+,J,PRL,68,1283,1992) E193300200009 Similar tendency around 2.5 MeV, but discrepancies E193300200010 around 2.0 MeV E193300200011 (N,,X.Gu+,J,PL/B,343,31,1995) E193300200012 Descrepancies around 2.0 MeV and below 1.3 MeV E193300200013 (N,E1737007,Y.Mizoi+,J,PR/C,62,065801,2000) E193300200014 Present data indicates roughly ten-times better E193300200015 statistics compared to this work at 1.5-2.8 MeV E193300200016 STATUS (TABLE) Corresponding to Fig.3 of J,NP/A,746,330,2004 E193300200017 HISTORY (20100223U) Nf. STATUS: Free text revised E193300200018 ENDBIB 16 0 E193300200019 COMMON 1 3 E193300200020 EN-ERR E193300200021 MEV E193300200022 0.05 E193300200023 ENDCOMMON 3 0 E193300200024 DATA 3 19 E193300200025 EN-CM DATA ERR-S E193300200026 MEV MB MB E193300200027 0.75 85.44626 28.534 E193300200028 0.85 235.1337 56.667 E193300200029 0.95 145.1001 31.342 E193300200030 1.05 122.8028 27.508 E193300200031 1.15 127.4007 24.079 E193300200032 1.25 136.0013 23.664 E193300200033 1.35 165.1055 24.436 E193300200034 1.45 204.7952 26.419 E193300200035 1.55 218.6703 24.491 E193300200036 1.65 294.4357 36.510 E193300200037 1.75 276.2447 29.282 E193300200038 1.85 310.3857 26.936 E193300200039 1.95 219.8022 25.937 E193300200040 2.05 261.0837 30.808 E193300200041 2.15 243.5199 28.248 E193300200042 2.25 354.6725 35.467 E193300200043 2.35 399.5993 38.760 E193300200044 2.45 369.4499 36.945 E193300200045 2.55 356.0128 55.181 E193300200046 ENDDATA 21 0 E193300200047 ENDSUBENT 46 0 E193300299999 SUBENT E1933003 20100514 E062E193300300001 BIB 5 7 E193300300002 REACTION ((2-HE-4(3-LI-8,N)5-B-11,,INT/DE,RSD)= E193300300003 (3-LI-8(A,N)5-B-11,,INT/DE,RSD)) E193300300004 EN-SEC (E-EXC,5-B-11) Excitation energy of 11B E193300300005 ERR-ANALYS (ERR-S) Statistical uncertainty E193300300006 STATUS (TABLE) Corresponding to Fig.4 of J,NP/A,746,330,2004 E193300300007 HISTORY (20060420A) On. RSD added in SF7 E193300300008 (20100223U) Nf. STATUS: Free text revised E193300300009 ENDBIB 7 0 E193300300010 COMMON 3 3 E193300300011 EN-CM-MIN EN-CM-MAX E-EXC-ERR E193300300012 MEV MEV MEV E193300300013 0.75 2.55 0.2 E193300300014 ENDCOMMON 3 0 E193300300015 DATA 3 40 E193300300016 E-EXC DATA ERR-S E193300300017 MEV MB MB E193300300018 -5.8 0. 0. E193300300019 -5.4 0. 0. E193300300020 -5.0 0. 0. E193300300021 -4.6 0. 0. E193300300022 -4.2 0. 0. E193300300023 -3.8 0. 0. E193300300024 -3.4 0. 0. E193300300025 -3.0 0. 0. E193300300026 -2.6 18.13058 11.95865 E193300300027 -2.2 0. 0. E193300300028 -1.8 53.08459 18.26432 E193300300029 -1.4 16.98217 11.20118 E193300300030 -1.0 61.11438 18.84067 E193300300031 -0.6 84.7936 25.28291 E193300300032 -0.2 89.02541 18.87087 E193300300033 0.2 113.2091 28.55168 E193300300034 0.6 109.5661 21.38043 E193300300035 1.0 68.426 21.33394 E193300300036 1.4 52.07381 19.1205 E193300300037 1.8 64.6998 21.22543 E193300300038 2.2 75.49908 23.89733 E193300300039 2.6 71.24117 20.13043 E193300300040 3.0 66.7783 22.83186 E193300300041 3.4 72.654 26.21828 E193300300042 3.8 78.267 24.47715 E193300300043 4.2 268.0402 37.76329 E193300300044 4.6 284.4622 36.25272 E193300300045 5.0 330.4831 39.47189 E193300300046 5.4 199.1583 26.5191 E193300300047 5.8 154.156 31.17468 E193300300048 6.2 141.9453 28.88983 E193300300049 6.6 325.578 85.68954 E193300300050 7.0 505.0579 63.24677 E193300300051 7.4 479.6057 50.03141 E193300300052 7.8 407.8745 70.08317 E193300300053 8.2 304.24 41.03253 E193300300054 8.6 171.2439 34.24014 E193300300055 9.0 0. 0. E193300300056 9.4 0. 0. E193300300057 9.8 0. 0. E193300300058 ENDDATA 42 0 E193300300059 ENDSUBENT 58 0 E193300399999 ENDENTRY 3 0 E193399999999