ENTRY 23853 20240408 2385300000001 SUBENT 23853001 20240408 20260228 2385300100001 BIB 14 64 2385300100002 TITLE Measurement of gamma-ray production via the neutron-16O2385300100003 reaction using a 77 MeV quasimonoenergetic neutron beam2385300100004 AUTHOR (Y.Ashida, H.Nagata, M.Mori, G.Collazuol, D.Fukuda, 2385300100005 T.Horai, F.Iacob, A.Konaka, Y.Koshio, T.Nakaya, 2385300100006 C.Nantais, T.Shima, A.Suzuki, Y.Takeuchi, H.Tanaka, 2385300100007 R.Wendell, T.Yano) 2385300100008 INSTITUTE (2JPNKTO,2ITYUPV,1CANTMF,2JPNOSA,1CANTOR,1USASTF) 2385300100009 (2JPNJPN) Okayama University, Okayama 2385300100010 (2JPNJPN) Kobe University, Kobe 2385300100011 REFERENCE (J,PR/C,109,014620,2024) 2385300100012 FACILITY (CYCLO,2JPNOSA) K 400 ring cyclotron 2385300100013 INC-SOURCE (P-LI7) Proton (Ep=80 +/- 0.6 MeV, 110 nA beam current)2385300100014 Proton beam had 200 ps wide bunches, separated by 2385300100015 62.5 ns. 2385300100016 SAMPLE Water in a cylindrical acrylic container 2385300100017 (20.0 cm diameter, 26.5 cm length), with thickness of 2385300100018 1.0 cm at ends and 0.5 cm at barrel walls. 2385300100019 DETECTOR (SCIN,CSICR) LaBr3(Ce) scintillator (4.5 cm diameter, 2385300100020 4.5 cm length) with Hamamatsu H6410 photomultiplier 2385300100021 tube (PMT) reads gamma-rays from neutron-oxygen 2385300100022 reactions. Positioned 20.5 cm from acrylic vessel, 2385300100023 reducing neutron background. Acceptance angle is 2385300100024 0.038 sr. 2385300100025 For neutron flux measurement the acrylic container 2385300100026 replaced with BC-501A organic liquid scintillator 2385300100027 (5" diameter, 8" length) coupled with Hamamatsu 2385300100028 H6527 PMT. Neutron scattering background measured with 2385300100029 OKEN CsI(Tl) crystal (3.5 X 3.5 X 3.5 cm3) and 2385300100030 H6410 PMT. 2385300100031 (HPGE) High-purity germanium detector 2385300100032 (ORTEC GEM 20180-P) used for precise gamma-ray 2385300100033 detection. The detector consists of a cylindrical 2385300100034 crystal (55 mm diameter, 46 mm length) with 2385300100035 9.2 mm diameter hole, 33.4 mm depth. 2385300100036 INC-SPECT The neutrons in the peak region (72 to 82 MeV) used for2385300100037 the measurement. 2385300100038 METHOD (PSD,TOF) 2385300100039 -The pulse-shape discrimination technique employed to 2385300100040 distinguish between neutron-like and gamma-ray-like 2385300100041 events 2385300100042 - The kinetic energy of neutron-like events was 2385300100043 derived from their Time-of-Flight within the 2385300100044 scintillator. 2385300100045 - The SCINFUL-QMD simulation is employed to calculate 2385300100046 and correct for the detector's efficiency, ensuring 2385300100047 accurate measurements of neutron flux. 2385300100048 -Convert the detected neutron events into neutron flux2385300100049 accounting for both the detector efficiency and the 2385300100050 cross-sectional area of the target. 2385300100051 CORRECTION The correction factor, which converts the flux measured2385300100052 by the BC-501A detector to the flux in the gamma-ray 2385300100053 measurement with water is 1.09. 2385300100054 Neutron flux 1.87 X 10**10 /Sr/uC, post-correction. 2385300100055 ERR-ANALYS (ERR-T) Statistical and systematic uncertainties of the2385300100056 neutron flux measurement. 2385300100057 - Statistical uncertainty (0.5%) 2385300100058 (ERR-1) Beam stability (1.4%) 2385300100059 (ERR-2) Neutron selection (2.2%) 2385300100060 (ERR-3) Detection efficiency by SCINFUL-QMD (10.0%) 2385300100061 (ERR-4) Kinetic energy reconstruction (1.0%) 2385300100062 (ERR-5) Former bunch and environmental events (1.0%) 2385300100063 (ERR-6) Correction from BC-501A to water (3.7%) 2385300100064 STATUS (TABLE,,Y.Ashida+,J,PR/C,109,014620,2024) Table V 2385300100065 HISTORY (20240408C) VT 2385300100066 ENDBIB 64 0 2385300100067 COMMON 6 3 2385300100068 ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 ERR-6 2385300100069 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 2385300100070 1.4 2.2 10.0 1.0 1.0 3.72385300100071 ENDCOMMON 3 0 2385300100072 ENDSUBENT 71 0 2385300199999 SUBENT 23853002 20240408 20260228 2385300200001 BIB 1 1 2385300200002 REACTION (8-O-16(N,X)0-G-0,PAR,SIG) 2385300200003 ENDBIB 1 0 2385300200004 COMMON 1 3 2385300200005 EN 2385300200006 MEV 2385300200007 77. 2385300200008 ENDCOMMON 3 0 2385300200009 DATA 5 9 2385300200010 E E DATA +ERR-T -ERR-T 2385300200011 MEV MEV MB MB MB 2385300200012 7.12 0.6 0.2 0.3 2385300200013 6.92 0.6 0.2 0.3 2385300200014 6.32 3.8 1.3 1.9 2385300200015 6.13 1.9 0.6 1.0 2385300200016 5.27 1.6 0.5 0.8 2385300200017 5.18 1.1 0.4 0.6 2385300200018 4.44 2.0 0.7 1.0 2385300200019 3.68 0.5 0.2 0.3 2385300200020 2.30 2.31 0.6 0.2 0.3 2385300200021 ENDDATA 11 0 2385300200022 ENDSUBENT 21 0 2385300299999 ENDENTRY 2 0 2385399999999