/*===================================================================*/ /* NRDF D1890 Data No.2 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,2; D#=D1890; TITLE=/ Precise measurement of the cross section of 3He(3He,2p)4He by using 3He doubly charged beam /; ATH=(N.KUDOMI'1', M.KOMORI'2', K.TAKAHISA'1', S.YOSHIDA'1', K.KUME'3', H.OHSUMI'4', T.ITAHASHI'1'); INST-ATH=(2JPNRCN'1', 2JPNIRS'2', 2JPNWER'3', 2JPNJPN'4'); /* '4' Faculty of Culture and Education, Saga University, Saga REF=PR/C; VLP=69(2004)015802; /* Secondary reference - NP/A, 718(2003)466 (T.Itahashi et al., Proc. of the Seventh International Symposium on Nuclei in the Cosmos (NIC7)) RCTS=3HE(3HE,2*P)4HE; PHQS=(XSECTN, ASTR-SFCTR); /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,2; /* 2004-04-16 : Compiled+Checked, C.Kurokawa + N.Otuka */ /* 2006-10-04 : Altered, N.Otuka. Reference (NIC7) added */ /* Related references - T.Itahashi et al., RSI, 69(1998)1032. (Performance and design of ion source) - T.Itahashi et al., RSI, 71(2000)1075. (Performance and design of ion source) CHM=ELM; PHYS-FORM=GAS'6'; /* '6' Windowless gas target consists of a differential pumping and gas circulation/purification system */ THK-TGT=XMG/CM**2'7'; /* '7' 0.75 Torr */ POL-TGT=0%; ALGN-TGT=0%; ACC=X'8'; /* '8' Accelerator, NANOGUN ECR ion source with specially designed ceramic insulator */ INST-ACC=2JPNOSA; INC-ENGY-CM-RANGE=31.2[45.3KEV'9'; /* '9' Effective reaction energy has 0.15% error, taking into account accuracy of 0.1% for acceleration voltage, 10% for stopping power, and 0.09% for energy spread in target */ BEAM-INTNSTY=200UA; CHRG-INC-ION=2+; POL-PRJ=0%; DET-PARTCL=(ALPHA,P); COINC=(P,P,ALPHA); ANT-COINC=NO; DET-SYS=(SSD'10',SSD'11',EDE'12'); /* '10' Delta E counters with FWHM of 100-120 keV for 5.48 MeV alpha particle */ /* '11' E counters with FWHM of 70-100 keV for 5.48 MeV alpha particle */ /* '12' 4 delta E-E counter telescopes */ /* Related references - A.Krauss et al., NP/A, 467(1987)273. Reference with which data agree (The accuracy of both statistical and systematic uncertainties of the present measurement is better than that in this work.) RCT=3HE(3HE,2*P)4HE; PHQ=ASTR-SFCTR; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,2; SYS-ERR=(0.15%'13',2%'14',1.3%'15',3%'16'); /* '13' Uncertainty in reaction energy */ /* '14' Uncertainty in beam intensity */ /* '15' Uncertainty in target density */ /* '16' Uncertainty in detection efficiency */ SYS-ERR=3.8%'17'; /* '17' Total systematic error */ /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; INC-ENGY-CM ASTR-SFCTR DELTA-ASTR-SFCTR'18' (KEV) (MEV*B) (MEV*B) 31.2 6.40 +-0.39 33.1 5.48 +-0.22 35.2 5.62 +-0.21 37.3 5.46 +-0.20 39.3 5.69 +-0.25 41.3 5.51 +-0.18 43.3 5.43 +-0.14 45.3 5.39 +-0.09 \END; /*===================================================================*/ |