ENTRY E0962 20040311 0000E096200000001 SUBENT E0962001 20040311 0000E096200100001 BIB 10 38 E096200100002 TITLE Measurement of a cross section for the 27Al(p,3pn)24Na E096200100003 reaction at 12 GeV E096200100004 AUTHOR (H.Hirabayashi, H.Ikeda, H.Ishii, K.Katoh, K.Kondo, E096200100005 M.Taino, M.Takasaki, T.Tominaka, A.Yamamoto, T.Asano, E096200100006 Y.Asano, Y.Iguchi, H.Kudo, S.Mori, Y.Takada) E096200100007 INSTITUTE (2JPNLEP) E096200100008 (2JPNTSU)Institute of Applied Physics E096200100009 REFERENCE (J,JPJ,51,(10),3098,198210) E096200100010 SAMPLE Chemical-form of target is element. E096200100011 Physical-form of target is solid. Aluminium foils E096200100012 which consisted of three or four layers are used. An E096200100013 inner aluminium foil which was sandwiched with outer E096200100014 aluminium foils was used as a sample in order to E096200100015 cancel scattering-in and scattering-out nuclei by E096200100016 incident protons [A.M. Poskanzer et al., Phys. Rev. E096200100017 102(1956)1390]. E096200100018 Target-thickness is 5.26+-0.05, 3.44+-0.03mg/cm**2. E096200100019 METHOD (ACTIV)Immediately after irradiation foils were E096200100020 removed from the hot area, and a sample portion E096200100021 of the inner foil which corresponded to a beam E096200100022 spot size was cut and sealed in a disk E096200100023 container made of lucite. E096200100024 FACILITY (SYNCH,2JPNLEP)KEK 12 GeV proton synchrotron E096200100025 DETECTOR (GELI)Detection efficiency is 1.57E-2+-0.05E-2. E096200100026 Standard 60Co sources of about 0.1 micro-Ci were E096200100027 used for calibration of the detection E096200100028 efficiency. E096200100029 (HPGE)Pure Germanium detector, detection efficiency is E096200100030 1.96E-3+-0.06E-3. Standard 60Co sources of about E096200100031 0.1 micro-Ci were used for calibration of the E096200100032 detection efficiency. E096200100033 ERR-ANALYS (ERR-1)Error in primary proton beam intensity E096200100034 (ERR-2)Error in beam halos (less than 5%) E096200100035 (ERR-3)Error in detector efficiencies E096200100036 (ERR-4)Error in position of samples E096200100037 (ERR-5)Error in alminium foil thicknesses E096200100038 HISTORY (20031024T)Data converted from NRDF D962 and EXFOR E096200100039 O0541 E096200100040 ENDBIB 38 0 E096200100041 COMMON 6 3 E096200100042 EN ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 E096200100043 GEV PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT E096200100044 12.0 10.0 5.0 3.5 2.0 1.0 E096200100045 ENDCOMMON 3 0 E096200100046 ENDSUBENT 45 0 E096200199999 SUBENT E0962002 20040311 0000E096200200001 BIB 5 24 E096200200002 REL-REF (A,,J.B.Cumming+,J,NIM,180,37,1981) E096200200003 H.Hirabayashi et al., mention that the obtained E096200200004 averaged cross section 8.1+-0.19 mb at 12 GeV is E096200200005 nearly equal to 7.92+-0.18 mb at 28 GeV obtained by E096200200006 J.B Cumming et al. Therefore the present results E096200200007 support Cumming's remark the cross section is nearly E096200200008 constant in the energy region of 10-30 GeV. E096200200009 REACTION 1(13-AL-27(P,X)11-NA-24,CUM,SIG) E096200200010 With Ge(Li) detector, Target thickness is E096200200011 5.26+-0.05mg/cm**2 (Sample A) E096200200012 2(13-AL-27(P,X)11-NA-24,CUM,SIG) E096200200013 With Ge(Li) detector, Target thickness is E096200200014 3.44+-0.03mg/cm**2 (Sample B-1), irradiated with B-2 E096200200015 in single exposure E096200200016 3(13-AL-27(P,X)11-NA-24,CUM,SIG) E096200200017 With Pure Ge detector, Target thickness is E096200200018 3.44+-0.03mg/cm**2 (Sample B-2), irradiated with B-1 E096200200019 in single exposure E096200200020 4(13-AL-27(P,X)11-NA-24,CUM,SIG) E096200200021 Averaged cross section for three measurements with E096200200022 Sample A, B-1 and B-2. E096200200023 DECAY-DATA (11-NA-24,,DG,1368.) E096200200024 ERR-ANALYS (DATA-ERR)The uncertainty is reported by authors E096200200025 STATUS (TABLE)Data taken from Table 1, p3100 in reference E096200200026 ENDBIB 24 0 E096200200027 NOCOMMON 0 0 E096200200028 DATA 8 1 E096200200029 DATA 1DATA-ERR 1DATA 2DATA-ERR 2DATA 3DATA-ERR 3E096200200030 DATA 4DATA-ERR 4 E096200200031 MB MB MB MB MB MB E096200200032 MB MB E096200200033 8.3 1.0 7.8 1.0 8.1 1.0 E096200200034 8.1 0.9 E096200200035 ENDDATA 6 0 E096200200036 ENDSUBENT 35 0 E096200299999 ENDENTRY 2 0 E096299999999