/*===================================================================*/ /* NRDF D1933 Data No.1 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,1; D#=D1933; TITLE=/ Measurement of the 8Li(alpha,n)11B reaction cross sections of astrophysical interest /; ATH=(H.ISHIYAMA'1', T.HASHIMOTO'2', T.ISHIKAWA'2', Y.X.WATANABE'1', S.K.DAS'3', H.MIYATAKEA'1,4', Y.MIZOI'3', T.FUKUDA'3', M.-H.TANAKA'1', Y.FUCHI'1', N.YOSHIKAWA'1', Y.HIRAYAMA'1', S.C.JEONG'1', T.NOMURA'1', I.KATAYAMA'1', S.MITSUOKA'4', K.NISHIO'4', M.MATSUDA'5', P.K.SAHA'3', S.ICHIKAWA'4', H.IKEZOE'4', T.FURUKAWA'5', H.IZUMI'5', T.SHIMODA'5', K.NAKAI'2'); INST-ATH=(2JPNKEK'1', 2JPNSUT'2', 2JPNJPN'3', 2JPNJAE'4', 2JPNJAE'5', 2JPNOSA'6'); /* '1' Institute of Particle and Nuclear Studies */ /* '2' Faculty of Science and Technology */ /* '3' Laboratory of Physics, Osaka Electro-Communication Univ., Neyagawa */ /* '4' Advanced Science Research Center */ /* '5' Tokai Research and Development Center */ /* '6' Graduate School of Science */ REF=PL/B; VLP=640(2006)82; /* Secondary references - NP/A, 746(2004)330 (T.Hashimoto et al., Proc. of the 6th International Conference on Radioactive Nuclear Beams (RNB6)) - NP/A, 738(2004)401 (H.Miyatake et al., Proc. of the 8th International Conference on Clustering Aspects of Nuclear Structure and Dynamics (CLUSTER'03)) RCTS=ALPHA(8LI,N)11B; PHQS=(EXC-FUNCT, ENGY-SPEC); /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,1; /* 2005-05-10 : Received, Received by e-mail from T.Hashimoto */ /* 2005-07-15 : Compiled+Checked, Kc + On */ /* 2006-10-04 : Altered, On. REFERENCE: NP/A,738 added */ /* 2010-02-23 : Altered, Nf. REFERENCE: PL/B,640 added */ CHM=X'8'; /* '8' He+CO2 (10%) */ PHYS-FORM=GAS; POL-TGT=0%; ALGN-TGT=0%; ACC=(VDGT'9',PRJFS'10'); /* '9' Secondary beam produced via the 9Be(7Li, 8Li) reaction, where a 42 micro-m thick 9Be foil was used as a production target. */ /* '10' Recoil Mass Separator (RMS) */ INST-ACC=(2JPNJAE'9',2JPNJAE'10'); BEAM-INTNSTY=XMA'11'; /* '11' Yield of 8Li at the focal plane of recoil mass separator was 4.8 x 10**3 Hz per 3.3 pnA 7Li-beam at 24 MeV. */ POL-PRJ=0%; ION-SOURCE=/ The purity of 8Li-beam was 99%. /; DET-PARTCL=(11B,N); COINC=(N,11B); ANT-COINC=NO; DET-SYS=(IC'12',PROP-CNTR'12',SCT'13',PPAC'13',TOF'14'); /* '12' Multiple-sampling and tracking proportional chamber (MSTPC) [Y. Mizoi et al., Nucl. Instrum. Meth. A431(1999)112] used to measure reaction energies of 8Li-beam and three-dimensional tracks of multiple charged particles and their energy losses along their trajectories. The detection efficiency is about 100 %. */ /* '13' To measure TOF of neutrons. Solid angle is 31.4% of 4-pi. Absolute efficiency was calibrated with a 252Cf fission source and it was about 40% at 5.0 MeV. */ /* '14' For the determination of the energy of 8Li-beam and for detecting neutrons */ EFCN-DET=/ The overall efficiency of the present system is about 10%. /* 2010-02-23 : Altered, Nf. STATUS: Free text revised */ /* Related references - T.Paradellis et al., ZP/A, 337(1990)211. (Present data indicates roughly 4-5 times larger than this work). See also EXFOR F0076.002. - R.N.Boyd et al., PRL, 68(1992)1283. (Similar tendency around 2.5 MeV, but discrepancies around 2.0 MeV ). See also NRDF D1644 DATA 1. - X.Gu et al., PL/B, 343(1995)31. (Discrepancies around 2.0 MeV and below 1.3 MeV) - Y.Mizoi et al., PR/C, 62(2000)065801. (Present data indicates roughly ten-times better statistics compared to this work at 1.5-2.8 MeV). See also NRDF D1737 DATA 6. RCT=(ALPHA(8LI,N)11B=8LI(ALPHA,N)11B); PHQ=EXC-FUNCT; DELTA-INC-ENGY-LAB=0.05MEV; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,1; SYS-ERR=[10%'15'; /* '15' Total systematic error */ DELTA-INC-ENGY-LAB=0.05MEV; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; INC-ENGY-CM (MEV) (MB) (MB) 0.75 85.44626 28.534 0.85 235.1337 56.667 0.95 145.1001 31.342 1.05 122.8028 27.508 1.15 127.4007 24.079 1.25 136.0013 23.664 1.35 165.1055 24.436 1.45 204.7952 26.419 1.55 218.6703 24.491 1.65 294.4357 36.510 1.75 276.2447 29.282 1.85 310.3857 26.936 1.95 219.8022 25.937 2.05 261.0837 30.808 2.15 243.5199 28.248 2.25 354.6725 35.467 2.35 399.5993 38.760 2.45 369.4499 36.945 2.55 356.0128 55.181 \END; /*===================================================================*/ |