ENTRY S0226 20200303 S027S022600000001 SUBENT S0226001 20200303 S027S022600100001 BIB 14 37 S022600100002 TITLE Spallation yield of neutrons produced in thick lead S022600100003 target bombarded with 250 MeV protons S022600100004 AUTHOR (L.Chen, F.Ma, X.Y.Zhang, Y.Q.Ju, H.B.Zhang, H.L.Ge, S022600100005 J.G.Wang, B.Zhou, Y.Y.Li, X.W.Xu, P.Luo, L.Yang, S022600100006 Y.B.Zhang, J.Y.Li, J.K.Xu, T.J.Liang, S.L.Wang, S022600100007 Y.W.Yang, L.Gu) S022600100008 INSTITUTE (3CPRIMP,3CPRIHP,3CPRUCA) S022600100009 (3CPRCPR) Institute of Physics, Chinese Academy of S022600100010 Sciences, Beijing S022600100011 REFERENCE (J,NIM/B,342,87,2015) S022600100012 #doi:10.1016/j.nimb.2014.09.020 S022600100013 FACILITY (CYCLO,3CPRIMP) Cooling Storage Ring on the Heavy Ion S022600100014 Research Facility in Lanzhou (HIRFL-CSR). S022600100015 SAMPLE A cylindrical lead target with 10 cm diameter and 10 S022600100016 cm length. S022600100017 DETECTOR (HPGE) The gamma activity of Au foils was measured S022600100018 with several high-purity germanium (HPGe) detectors. S022600100019 The detectors relative efficiency were about 65% and S022600100020 energy resolutions were 1.90 keV at 1.33 MeV. The S022600100021 absolute efficiency was calibrated with the standard S022600100022 sources 60Co, 133Ba, 137Cs, and 152Eu. S022600100023 (IOCH) An air ionization chamber was placed in front S022600100024 of the target to monitor the beam current. S022600100025 METHOD Water-bath gold activation-foil method. S022600100026 (ACTIV) The irradiation lasted about 22 h. The total S022600100027 number of protons was (1.69+-0.05)E12. S022600100028 (GSPEC) The Au-foil activities were determined by S022600100029 measuring the peak intensities of the 412 keV line S022600100030 from 198Au. S022600100031 MONITOR (13-AL-27(P,X)11-NA-24,CUM,SIG) S022600100032 MONIT-REF (,H.Yashima+,J,NIM/B,226,243,2004) S022600100033 CORRECTION Gamma self-absorption. S022600100034 ERR-ANALYS (DATA-ERR) The overall uncertainty included the S022600100035 systematic error in the measurement is +-8%. S022600100036 STATUS (TABLE) Data were obtained from text of S022600100037 Nucl.Instrum.Meth.B, 324(2015)87-90. S022600100038 HISTORY (20200303C) Jimin Wang (CNDC) S022600100039 ENDBIB 37 0 S022600100040 COMMON 1 3 S022600100041 MONIT S022600100042 MB S022600100043 10.6 S022600100044 ENDCOMMON 3 0 S022600100045 ENDSUBENT 44 0 S022600199999 SUBENT S0226002 20200303 S027S022600200001 BIB 3 9 S022600200002 REACTION (82-PB-0(P,X)0-NN-1,,PY,,TT) S022600200003 COMMENT Initially, the measured yield of the neutrons emitted S022600200004 from the target was deduced to be 1.91+-0.16 S022600200005 n/proton. After taking into account the influence of S022600200006 the Au foils with Cd cover on the production of S022600200007 thermal neutrons. Finally, the value was determined S022600200008 to be 2.23+-0.19 n/proton. S022600200009 CORRECTION The measured neutron flux in those positions S022600200010 influenced by the Cd cover. S022600200011 ENDBIB 9 0 S022600200012 NOCOMMON 0 0 S022600200013 DATA 3 1 S022600200014 EN DATA DATA-ERR S022600200015 MEV/A PRD/INC PRD/INC S022600200016 250. 2.23 0.19 S022600200017 ENDDATA 3 0 S022600200018 ENDSUBENT 17 0 S022600299999 ENDENTRY 2 0 S022699999999