/*===================================================================*/ /* NRDF D1814 Data No.2 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,2; D#=D1814; TITLE=/Search for 21B/; PURPOSE=/To find the very neutron-rich isotope 21B among the fragmentation of a 94A MeV 40Ar beam./; ATH=(A.OZAWA'1', Y.YAMAGUCHI'1,2', M.CHIBA'1,3', R.KANUNGO'1', K.KIMURA'4', S.MOMOTA'5', T.SUDA'1', T.SUZUKI'2', I.TANIHATA'1', T.ZHENG'1,6,7', S.WATANABE'2', T.YAMAGUCHI'1,8', K.YOSHIDA'1'); INST-ATH=(2JPNIPC'1', 2JPNNII'2', 2JPNTOH'3', 2JPNNIA'4', 2JPNJPN'5', 2JPNSUT'6', 3CPRBJG'7', 2GERGSI'8'); /* '2' Department of Physics */ /* '3' Department of Physics */ /* '5' Kochi University of Technology, Tosayamada, Kochi */ /* '6' Department of Physics */ /* '7' Department of Technical Physics */ REF=PR/C; VLP=67(2003)014610; RCTS=(9BE(40AR,X)X, 181TA(40AR,X)X); PHQS=XSECTN'9'; /* '9' Production cross section */ /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,2; /* 2003-07-26 : Compiled */ RTY=FRAG; PHQ=XSECTN'10'; /* '10' Production cross section */ ENR=X%'11'; /* '11' Mass number of target is not given in reference but obtained by private communication. */ CHM=ELM; PHYS-FORM=SLD; BAC=X; POL-TGT=0%; ALGN-TGT=0%; ACC=CYC'12'; /* '12' AVF and RIKEN Ring Cyclotron */ INST-ACC=2JPNIPC; INC-ENGY-LAB=[94MEV/A; BEAM-INTNSTY=40PNA; POL-PRJ=0%; COINC=NO; ANT-COINC=NO; DET-SYS=(MAG,SCT'13',SI'14',PPAC'15',TOF'16'); /* '13' Plastic scintillator to determine TOF and delta-E */ /* '14' To provide delta-E */ /* '15' To determine magnetic rigidity (Brho) values. Efficiencies of the PPAC at F1 for B isotope were more than 90 % and close to 100 % for B isotopes for PPAC at F2. */ /* '16' Brho-delta-E-TOF method (where Brho is magnetic rigidity and delta-E is energy loss) */ SOLID-ANGL=5MSR; EFCN-DET=/ The RIPS setting was optimized for seven nuclei (25F, 24O, 23N, 22C, 19B, 17B and 15B). /; ANL=X'17'; /* '17' EPAX2 (Empirical PArametrization of fragmentation Cross Section)[K.Suemmerer and B.Blank, Phys. Rev. C61, 034607(2000)] is used to compared with observed production cross section in Fig. 3 and 4 in reference. */ /* Experimental Method: - On-line mass separation (Brho-delta-E-TOF method (where Brho is magnetic rigidity and delta-E is energy loss) ) - Time-of-flight (Brho-delta-E-TOF method (where Brho is magnetic rigidity and delta-E is energy loss) ) /* Analysis: - The transmission losses were estimated were estimated by Monte Carlo type calculation using code MOCADI [A. S. Goldhaber, Phys. Lett. 53B,306(1974)]. According to authors simulations, the transmission from the target to F2 were typically 3-10 %. RCT=181TA(40AR,X)X; THK-TGT=686MG/CM**2; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,2; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; Z-EMT A-EMT XSECTN'20' DELTA-XSECTN'20,21' (NODIM) (NODIM) (B) (B) 5 15 1.51E-04 +-0.50E-04 5 17 9.8E-07 +-2.1E-07 5 19 1.59E-09 +-0.48E-09 6 17 7.3E-05 +-2.1E-05 6 19 3.16E-07 +-0.69E-07 6 20 3.4E-08 +-1.1E-08 6 22 7.7E-11 +-4.9E-11 7 22 3.4E-07 +-1.4E-07 7 23 3.9E-09 +-2.1E-09 8 23 3.4E-06 +-1.2E-07 8 24 1.17E-07 +-0.33E-07 9 25 1.05E-05 +-0.31E-05 9 26 2.65E-07 +-0.77E-07 \END; /*===================================================================*/ |