/*===================================================================*/ /* NRDF D1826 Data No.1 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,1; D#=D1826; TITLE=/ High-energy p-Li neutron field for activation experiment /; PURPOSE=/ To develop p-7Li quasi-monoenergetic neutron field at energies between 18 and 38 MeV /; ATH=(Y.UWAMINO'1', T.S.SOEWARSONO'2', H.SUGITA'2', Y.UNO'2', T.NAKAMURA'2', T.SHIBATA'3', M.IMAMURA'3', S.SHIBATA'3'); INST-ATH=(2JPNIPC'1', 2JPNTOH'2', 2JPNINS'3'); /* '2' Cyclotron and Radioisotope Center */ REF=NIM/A; VLP=389(1997)463; RCTS=7LI(P,N)7BE; PHQS=ANGL-DSTRN; /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,1; /* 2003-09-22 : Compiled, Kc + On */ PHQ=ANGL-DSTRN; /* Additional results shown but not compiled - Activation cross sections induced by neutron: 197Au(n,2n)196Au, 197Au(n,4n)194Au and 59Co(n,2n+alpha)54Mn given in Fig.7, 8 and 9 in the reference - Neutron spectra (Forward neutron flux of 40, 35, 30, 25 and 20 MeV p-7Li irradiation (Fig.2), which include contribution both of Li target and graphite stopper.) ENR=X%; CHM=ELM; PHYS-FORM=SLD; THK-TGT=XMG/CM**2'4'; /* '4' 2-mm-thick 7Li target */ BAC=C; THK-BAC=XMG/CM**2'5'; /* '5' 12-mm-thick graphite stopper */ POL-TGT=0%; ALGN-TGT=0%; ACC=CYC; INST-ACC=2JPNTOH'6'; /* '6' Cyclotron and Radioisotope Center */ POL-PRJ=0%; DET-PARTCL=(GAMMA'7',N); /* '7' Delayed gamma from 7Be */ COINC=NO; ANT-COINC=NO; DET-SYS=(SCT'8',GE'9',TOF'10'); /* '8' To measure neutrons, 127-mm-diameter by 127-mm-long NE213 scintillator. The efficiencies were calculated by using the Monte Carlo response function code [Y.Uwamino et al., Nucl. Instr. and Meth. 204(1982)179]. */ /* '9' To measure 478 keV gamma-ray in electron capture 7Be(g.s.) to 7Li */ /* '10' The over all time resolution was smaller than 1 ns. */ /* Experimental Method: - Time-of-flight (The over all time resolution was smaller than 1 ns.) /* Analysis: - Integration of energy distribution (Integrations have been done for peak neutrons corresponding to the 7Li(p,n)7Be (0+0.429 MeV9 reaction) - Since the ground and the first excited states of 7Be are the only particle-emission-stable states of 7Be, the number of residual 7Be nuclei of the 7Li(p,n) reaction equals to the number of peak neutrons corresponiding to the [0+0.429 MeV] states released in the 4pi direction. /* 2006-10-05 : Altered, Is. Re-digitized */ RCT=7LI(P,N)7BE; INC-ENGY-LAB=20MEV; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,1; TOT-ERR=X%'11'; /* '11' Uncertainty not given by authors */ INC-ENGY-LAB=20MEV; ENGY-GAMMA=478KEV'12'; INTNSTY-GAMMA=0.1035'12'; HALF-LIFE=53.3DAY'12'; /* '12' Delayed gamma from 7Be via NONe */ EXC-ENGY=(0MEV,0.429MEV); /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; THTL DSIGMA/DOMEGA (DEG) (ARB) 2.147E+00 7.522E-01 4.972E+00 3.729E-01 1.000E+01 7.960E-01 1.496E+01 5.663E-01 2.017E+01 4.333E-01 3.014E+01 3.311E-01 3.995E+01 3.800E-01 6.005E+01 2.896E-01 8.012E+01 1.142E-01 1.102E+02 1.250E-01 1.252E+02 8.892E-02 \END; /*===================================================================*/ |