ENTRY 32898 20241210 32153289800000001 SUBENT 32898001 20241210 32153289800100001 BIB 14 62 3289800100002 TITLE Cross-section measurements of the 81Br(n,2n)80mBr 3289800100003 reaction via secondary nuclear decay 3289800100004 AUTHOR (Junhua Luo,Li Jiang,Long He,Liang Zhou) 3289800100005 INSTITUTE (3CPRHXU,3CPRNPC) 3289800100006 REFERENCE (J,RPC,206,110759,2023) 3289800100007 #doi:10.1016/j.radphyschem.2023.110759 3289800100008 FACILITY (NGEN,3CPRNPC) K-400 Neutron Generator 3289800100009 INC-SOURCE (D-T) The neutrons were produced with an effective 3289800100010 deuteron beam energy of 134 keV, and a beam current 3289800100011 of 240 uA. 3289800100012 METHOD (ACTIV) The irradiation of the samples was carried 3289800100013 out with a total duration of approximately 2 h with a 3289800100014 neutron yield 4 to 5 E10 n/s in the 4 Pi solid angle. 3289800100015 Each sample was measured twice. More specifically, 3289800100016 the first set of measurements was performed between 3289800100017 12 and 49 min after the end of the irradiation, and 3289800100018 the second set 20 h after the end of the irradiation. 3289800100019 The measuring time is 119 s. 3289800100020 SAMPLE (35-BR-81,NAT=0.4931) Approximately 0.6-0.9 g of NaBr 3289800100021 powder (99.99% pure) was put within a sample box 3289800100022 (polymethyl methacrylate). Subsequently, four samples 3289800100023 with a diameter of 20 mm and eight monitors 3289800100024 (niobium foil of 99.99% purity) with the same 3289800100025 diameter were prepared for the irradiation experiments.3289800100026 *******************************************************3289800100027 Sample Mass Thickness 81Br isotope weight Number3289800100028 No. (g) (cm) in the sample(g) atoms(E21)3289800100029 *******************************************************3289800100030 1 0.6721 0.0668 0.2574 1.91343289800100031 2 0.8516 0.0846 0.3261 2.42443289800100032 3 0.9445 0.0939 0.3617 2.68893289800100033 4 0.9267 0.0921 0.3549 2.63823289800100034 *******************************************************3289800100035 DETECTOR (HPGE) A low background high-purity germanium (HPGe) 3289800100036 detector (ORTEC, model GEM 60P, crystal diameter of 3289800100037 70.1 mm, crystal length of 72.3 mm) with a relative 3289800100038 efficiency of about 68% and an energy resolution of 3289800100039 1.69 keV at 1.332 MeV for 60Co. To secure the energy 3289800100040 and efficiency of the detector, a calibration process 3289800100041 was carried out by using the standard gamma-ray 3289800100042 sources 133Ba, 137Cs, 152Eu, and 226Ra. The curve of 3289800100043 absolute efficiency calibration was acquired at 8 cm 3289800100044 from the surface of the germanium crystal. 3289800100045 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) 3289800100046 MONIT-REF (,,3,IRDFF-II,,2020) 3289800100047 DECAY-MON (41-NB-92-M,10.15D,DG,934.44,0.9915) 3289800100048 CORRECTION The correction factors at the energy levels of 616.3 3289800100049 keV for gamma-ray are given. The attenuation 3289800100050 correction factor of the polymethyl methacrylate was 3289800100051 1.003 for 616.3 keV rays. The angles of the four 3289800100052 samples that are relative to the beam are 0 deg (No.1),3289800100053 45 deg (No.4), 90d eg (No.2), and 135 deg (No.3). 3289800100054 *******************************************************3289800100055 g-ray u/p (cm2/g) u(NaBr) samples factor3289800100056 (keV) Na Br NaBr (cm-1) No. 3289800100057 *******************************************************3289800100058 616.3 0.0766 0.0743 0.0748 0.240 1 1.008 3289800100059 2 1.010 3289800100060 3 1.011 3289800100061 4 1.011 3289800100062 *******************************************************3289800100063 HISTORY (20241210C) Xi Tao and Jimin Wang 3289800100064 ENDBIB 62 0 3289800100065 COMMON 1 3 3289800100066 EN-RSL-HW 3289800100067 MEV 3289800100068 0.2 3289800100069 ENDCOMMON 3 0 3289800100070 ENDSUBENT 69 0 3289800199999 SUBENT 32898002 20241210 32153289800200001 BIB 4 28 3289800200002 REACTION (35-BR-81(N,2N)35-BR-80-M,,SIG) 3289800200003 DECAY-DATA (35-BR-80-M,4.4205HR,DG,37.05,0.391, 3289800200004 DG,48.85,0.00317) 3289800200005 ERR-ANALYS (ERR-T) The overall uncertainty 3289800200006 (ERR-1) The integral of the g-ray peak from the 3289800200007 experimental spectrum of measured reaction 3289800200008 (ERR-2) The integral of the g-ray peak from the 3289800200009 experimental spectrum of monitor reaction 3289800200010 (ERR-3) Gamma-ray intensity of measured reaction 3289800200011 (ERR-4) Gamma-ray intensity of monitor reaction 3289800200012 (ERR-5) Mass of Br 3289800200013 (ERR-6) Mass of Nb 3289800200014 (ERR-7) Abundance of the target nuclide 3289800200015 (ERR-8) Represents the full-energy peak efficiency of 3289800200016 the characteristic g-rays of measured reaction 3289800200017 (ERR-9) Represents the full-energy peak efficiency of 3289800200018 the characteristic g-rays of monitor reaction 3289800200019 (ERR-10) Counting collection factor of the nuclei 3289800200020 during the cooling time (t1) and the measurement in 3289800200021 the HPGe detector (t2) for the isomer 3289800200022 (ERR-11) Counting collection factor of the nuclei 3289800200023 during the cooling time (t1) and the measurement in 3289800200024 the HPGe detector (t2) for the ground state 3289800200025 (ERR-12) Counting collection factor of the nuclei 3289800200026 during the cooling time (t1) and the measurement in 3289800200027 the HPGe detector (t2) for the monitor 3289800200028 (MONIT-ERR) The monitor cross-section 3289800200029 STATUS (TABLE,,Junhua Luo+,J,RPC,206,110759,2023) Table 8 3289800200030 ENDBIB 28 0 3289800200031 COMMON 6 3 3289800200032 ERR-3 ERR-4 ERR-6 ERR-7 ERR-8 ERR-9 3289800200033 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3289800200034 8.96 0.04 0.01 0.14 2.58 2.503289800200035 ENDCOMMON 3 0 3289800200036 DATA 10 4 3289800200037 EN DATA ERR-T ERR-1 ERR-2 ERR-5 3289800200038 ERR-10 ERR-11 ERR-12 MONIT-ERR 3289800200039 MEV MB MB PER-CENT PER-CENT PER-CENT 3289800200040 PER-CENT PER-CENT PER-CENT PER-CENT 3289800200041 13.5 680. 67. 1.52 0.89 0.023289800200042 0.60 0.30 1.05 0.63 3289800200043 14.1 720. 71. 1.50 0.92 0.033289800200044 0.62 0.52 1.17 0.55 3289800200045 14.4 760. 75. 1.05 0.89 0.033289800200046 0.34 0.30 1.00 0.54 3289800200047 14.8 790. 78. 1.38 0.98 0.043289800200048 0.57 0.67 0.80 0.56 3289800200049 ENDDATA 12 0 3289800200050 ENDSUBENT 49 0 3289800299999 SUBENT 32898003 20241210 32153289800300001 BIB 4 27 3289800300002 REACTION (35-BR-81(N,2N)35-BR-80-G,,SIG) 3289800300003 DECAY-DATA (35-BR-80-G,17.68MIN,DG,616.3,0.067) 3289800300004 ERR-ANALYS (ERR-T) The overall uncertainty 3289800300005 (ERR-1) The integral of the g-ray peak from the 3289800300006 experimental spectrum of measured reaction 3289800300007 (ERR-2) The integral of the g-ray peak from the 3289800300008 experimental spectrum of monitor reaction 3289800300009 (ERR-3) Gamma-ray intensity of measured reaction 3289800300010 (ERR-4) Gamma-ray intensity of monitor reaction 3289800300011 (ERR-5) Mass of Br 3289800300012 (ERR-6) Mass of Nb 3289800300013 (ERR-7) Abundance of the target nuclide 3289800300014 (ERR-8) Represents the full-energy peak efficiency of 3289800300015 the characteristic g-rays of measured reaction 3289800300016 (ERR-9) Represents the full-energy peak efficiency of 3289800300017 the characteristic g-rays of monitor reaction 3289800300018 (ERR-10) Counting collection factor of the nuclei 3289800300019 during the cooling time (t1) and the measurement in 3289800300020 the HPGe detector (t2) for the isomer 3289800300021 (ERR-11) Counting collection factor of the nuclei 3289800300022 during the cooling time (t1) and the measurement in 3289800300023 the HPGe detector (t2) for the ground state 3289800300024 (ERR-12) Counting collection factor of the nuclei 3289800300025 during the cooling time (t1) and the measurement in 3289800300026 the HPGe detector (t2) for the monitor 3289800300027 (MONIT-ERR) The monitor cross-section 3289800300028 STATUS (TABLE,,Junhua Luo+,J,RPC,206,110759,2023) Table 9 3289800300029 ENDBIB 27 0 3289800300030 COMMON 6 3 3289800300031 ERR-3 ERR-4 ERR-6 ERR-7 ERR-8 ERR-9 3289800300032 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3289800300033 8.96 0.04 0.01 0.14 2.58 2.503289800300034 ENDCOMMON 3 0 3289800300035 DATA 10 4 3289800300036 EN DATA ERR-T ERR-1 ERR-2 ERR-5 3289800300037 ERR-10 ERR-11 ERR-12 MONIT-ERR 3289800300038 MEV MB MB PER-CENT PER-CENT PER-CENT 3289800300039 PER-CENT PER-CENT PER-CENT PER-CENT 3289800300040 13.5 390. 38. 0.75 0.89 0.023289800300041 0.60 0.30 1.05 0.63 3289800300042 14.1 400. 39. 0.69 0.92 0.033289800300043 0.62 0.52 1.17 0.55 3289800300044 14.4 420. 41. 0.59 0.89 0.033289800300045 0.34 0.30 1.00 0.54 3289800300046 14.8 430. 42. 0.87 0.98 0.043289800300047 0.57 0.67 0.80 0.56 3289800300048 ENDDATA 12 0 3289800300049 ENDSUBENT 48 0 3289800399999 SUBENT 32898004 20241210 32153289800400001 BIB 3 4 3289800400002 REACTION 1(35-BR-81(N,2N)35-BR-80,,SIG) 3289800400003 2(35-BR-81(N,2N)35-BR-80-M/G,,SIG/RAT) 3289800400004 ERR-ANALYS (DATA-ERR) Total uncertainty 3289800400005 STATUS (TABLE,,Junhua Luo+,J,RPC,206,110759,2023) Table 10 3289800400006 ENDBIB 4 0 3289800400007 NOCOMMON 0 0 3289800400008 DATA 7 4 3289800400009 EN DATA 1DATA-ERR 1DATA 2DATA-ERR 2MONIT 3289800400010 MONIT-ERR 3289800400011 MEV MB MB NO-DIM NO-DIM MB 3289800400012 MB 3289800400013 13.5 1070. 78. 1.72 0.24 453.03289800400014 2.9 3289800400015 14.1 1120. 82. 1.80 0.25 459.73289800400016 2.5 3289800400017 14.4 1180. 85. 1.81 0.25 460.13289800400018 2.5 3289800400019 14.8 1220. 89. 1.84 0.26 460.23289800400020 2.6 3289800400021 ENDDATA 12 0 3289800400022 ENDSUBENT 21 0 3289800499999 ENDENTRY 4 0 3289899999999