/*===================================================================*/ /* NRDF D1737 Data No.4 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,4; D#=D1737; TITLE=/ Measurement of the 8Li(alpha,n)11B reaction and astrophysical implications /; PURPOSE=/ To measure the 8Li(alpha,n)11B reaction directly and exclusively, and determine the total cross sections. /; ATH=(Y.MIZOI'1', T.FUKUDA'1', Y.MATSUYAMA'1', T.MIYACHI'1', H.MIYATAKE'1', N.AOI'2', N.FUKUDA'2', M.NOTANI'2', Y.X.WATANABE'2', A.YONEDA'2', M.ISHIHARA'3', H.SAKURAI'3', Y.WATANABE'3', A.YOSHIDA'3'); INST-ATH=(2JPNINS'1', 2JPNTOK'2', 2JPNIPC'3'); /* '2' Department of Physics */ REF=PR/C; VLP=62(2000)065801; /* Secondary reference - PR/C, 91(2015)047602 (reanalysis of the experimental data) RCTS=(ALPHA(8LI,N)11B, ALPHA(9BE,N)12C, ALPHA(8LI,N,ALPHA)7LI); PHQS=(TOT-XSECTN, ENGY-SPEC, BRANCH-RATIO, XSECTN, EXC-FUNCT, ASTR-SFCTR); /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,4; /* 2002-04-20 : Compiled+Checked, Ic + Sr */ /* 2015-06-17 : Altered, Ichiko added reference and subentry 11 */ /* 2015-06-30 : Received, Received by e-mail from Y.Mizoi */ ENR=NAT; PHYS-FORM=GAS; THK-TGT=XMG/CM**2'5'; /* '5' about 400 torr pressure */ POL-TGT=0%; ALGN-TGT=0%; ACC=CYC; INST-ACC=2JPNIPC; BEAM-INTNSTY=XMA'6'; /* '6' 1 to 2*10**3 particles per second */ POL-PRJ=0%; DET-PARTCL=N; COINC=NO; ANT-COINC=NO; DET-SYS=(X'7',SCT'8'); /* '7' MSTPC (MUSIC type detector which works as detection medium and a gas target) */ /* '8' To detect neutron */ SOLID-ANGL=188MSR'9'; /* '9' 1.5% of 4pi */ MONTR-RCT=/ , 9Be(alpha,n)12C to verify the present experimental procedures /; EFCN-DET=/ overall efficiency was about 1.0-1.5% for the energy region from 1.5 to 7.0MeV for all states of 11B. /; RCT=ALPHA(8LI,N)11B; RTY=DIRECT-RCT; PHQ=BRANCH-RATIO; CHM=X'15'; /* '15' 4He gas admixed with 5% and 10% isobutane gas are used, results is probably averaged for two densities but there is no description in the reference */ INC-ENGY-LAB-RANGE=1.5[7.0MEV; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,4; INC-ENGY-LAB=1.5[7.0MEV; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; EXC-ENGY BRANCH-RATIO'16' DELTA-BRANCH-RATIO (MEV) (NODIM) (NODIM) 0.00 0.2432 +-0.1255 2.12 0.1517 +-0.1044 4.44 0.0417 +-0.0717 5.02 0.0613 +-0.0574 6.765 0.1301 +-0.0803 7.29 0.1245 +-0.1038 7.98 0.1056 +-0.0710 8.56 0.0000 +-0.0212 8.92 0.1422 +-0.0669 \END; /*===================================================================*/ |