ENTRY 23609 20231013 2360900000001 SUBENT 23609001 20231013 20240316 2360900100001 BIB 14 53 2360900100002 TITLE Angular distribution of gamma rays from a 2360900100003 neutron-induced p- wave resonance of 132Xe 2360900100004 AUTHOR (T.Okudaira,Y.Tani,S.Endo,J.Doskow,H.Fujioka, 2360900100005 K.Hirota,K.Kameda,A.Kimura,M.Kitaguchi, M.Luxnat, 2360900100006 K.Sakai,D.C.Schaper,T.Shima, H.M.Shimizu,W.M.Snow, 2360900100007 S.Takada,T.Yamamoto, H.Yoshikawa,T.Yoshioka) 2360900100008 INSTITUTE (2JPNNAG,2JPNJAE,2JPNTIT,1USAINU,1USALAS,2JPNOSA, 2360900100009 2JPNKYU) 2360900100010 REFERENCE (J,PR/C,107,054602,2023) 2360900100011 #doi:10.1103/PhysRevC.107.054602 2360900100012 FACILITY (SYNCH,2JPNJAE) ANNRI(BL04) beam line of MLF at J-PARC 2360900100013 INC-SOURCE (SPALL) Spallation reaction in a mercury target 2360900100014 irradiated with 3-GeV protons (600 kW) . 2360900100015 The proton beams were supplied at a repetition rate of 2360900100016 25 Hz and in the "double-bunch mode". 2360900100017 Produced neutrons were slowed down in a supercritical 2360900100018 para hydrogen moderator. 2360900100019 A Cd filter was used to cut the low-energy tail of 2360900100020 neutron pulse. 2360900100021 To reduce gamma-rays from a large 14.4 eV s-wave 2360900100022 resonance, an enriched Xe-131 (84.4%) gas filter 2360900100023 with a pressure of 0.43 MPa, and a thickness of 76 mm 2360900100024 was installed upstream of the Xe-131 sample. 2360900100025 INC-SPECT Relative neutron flux was reconstructed using the 478 2360900100026 keV gamma-rays from gamma rays from the B-10 (n,alpha 2360900100027 gamma) Li-7 reactions. 2360900100028 DETECTOR (GE,BGO) An array of Ge detector consists of two 2360900100029 cluster-Ge detectors and eight coaxial-Ge detectors 2360900100030 with BGO anti-coincidence shields. 2360900100031 DAQ: CAEN V1724 Digitizer (14bit, 100MHz) 2360900100032 SAMPLE 84.4% enriched Xe-131 gas sealed into a cylindrical 2360900100033 cell with a pressure of 0.43 MPa, a diameter of 49 mm 2360900100034 and a thickness of 76 mm. 2360900100035 METHOD (TOF) Flight length: 21.5 m 2360900100036 CORRECTION Dead time correction was applied with a paralyzable 2360900100037 dead time model. 2360900100038 ANALYSIS (SHAPE) The resonance parameters of the 3.2-eV p-wave 2360900100039 resonance were determined by fitting the relative 2360900100040 gamma yeild gated with the full absorption and single 2360900100041 escape peaks of 7132 keV gamma rays. The 3.2-eV 2360900100042 p-wave resonance was fitted with the Breit-Wigner 2360900100043 function including the background and the s-wave 2360900100044 component (1/v term) . The effects of the Doppler 2360900100045 broadening (free gas at 295 K) and the resolution 2360900100046 function of ANNRI were convolved with the 2360900100047 Breit-Wigner function. In the fitting, the total 2360900100048 width of the 3.2-eV p-wave resonance was used as the 2360900100049 gamma width, because the neutron width of the p-wave 2360900100050 resonance is negligibly smaller than the gamma width. 2360900100051 ERR-ANALYS (DATA-ERR) The uncertainty of resonance prameters 2360900100052 were deduced from the uncertainty of the fitting 2360900100053 result. 2360900100054 HISTORY (20231110C) By A. Kimura. 2360900100055 ENDBIB 53 0 2360900100056 NOCOMMON 0 0 2360900100057 ENDSUBENT 56 0 2360900199999 SUBENT 23609002 20231013 20240316 2360900200001 BIB 2 3 2360900200002 REACTION 1(54-XE-131(N,0),,EN) 2360900200003 2(54-XE-131(N,G),,WID) 2360900200004 STATUS (TABLE,,T.Okudaira,J,PR/C,107,054602,2023) Table 1 2360900200005 ENDBIB 3 0 2360900200006 NOCOMMON 0 0 2360900200007 DATA 4 1 2360900200008 DATA 1DATA-ERR 1DATA 2DATA-ERR 2 2360900200009 EV EV MILLI-EV MILLI-EV 2360900200010 3.20 0.01 174. 7. 2360900200011 ENDDATA 3 0 2360900200012 ENDSUBENT 11 0 2360900299999 ENDENTRY 2 0 2360999999999