ENTRY 32883 20251124 3288300000001 SUBENT 32883001 20251124 20260228 3288300100001 BIB 15 81 3288300100002 TITLE Cross-sections and isomeric ratios for the 136Xe 3288300100003 (n,2n)135m,gXe reactions in the 14 MeV region with 3288300100004 covariance analysis 3288300100005 AUTHOR (Junhua Luo, Juncheng Liang, Li Jiang, Fei Tuo, 3288300100006 Long He, Liang Zhou, Quan Yan) 3288300100007 INSTITUTE (3CPRHXU,3CPRNPC) 3288300100008 (3CPRCPR) National Institute of Metrology, Beijing 3288300100009 (3CPRCPR) National Institute for Radiological 3288300100010 Protection, China CDC, Beijing 3288300100011 REFERENCE (J,EPJ/A,58,142,2022) 3288300100012 #doi:10.1140/epja/s10050-022-00797-5 3288300100013 FACILITY (NGEN,3CPRNPC) A K-400 neutron generator 3288300100014 INC-SOURCE (D-T) The reaction of 3H(d,n)4He was used to provide 3288300100015 neutrons in 13 - 15 MeV with a beam current of about 3288300100016 200 uA and deuteron beam energy of about 134 keV. A 3288300100017 tritium-titanium target with a thickness of 2.65 3288300100018 mg/cm2. 3288300100019 SAMPLE (54-XE-136,NAT=0.088573) 2.3-5.2 g of pure natural 3288300100020 isotopic xenon gas (99.999% pure) at a pressure of 3288300100021 120-250 atm in a 1 mm thick stainless steel sphere 3288300100022 container with an inner diameter of 20 mm were used 3288300100023 for our experiments. Five samples and ten diameter 20 3288300100024 mm monitors (0.12 mm thick niobium foils with a 3288300100025 purity of 99.99%) were prepared for irradiation. Five 3288300100026 stacks of ZrNbAl-Xe-AlNbZr were made and mounted at 0 3288300100027 deg, 45 deg, 90 deg, 110 deg, and 135deg relative to 3288300100028 the direction of the beam. The iron density is 7.86 3288300100029 g/cm3 3288300100030 +-----------------------------------------------------+3288300100031 Sample No. Samples density (g/cm3) 3288300100032 -------------------------------------------------------3288300100033 1 1.2420 3288300100034 2 0.5857 3288300100035 3 1.1916 3288300100036 4 0.5498 3288300100037 5 0.5453 3288300100038 +-----------------------------------------------------+3288300100039 METHOD (ACTIV) 2 h irradiation at a yield of (4 - 5)E10 n/s. 3288300100040 The distance between the center of the sample 3288300100041 sphere and the end of the neutron production target 3288300100042 was usually set to 5 cm. A cadmium foil (1 mm thick 3288300100043 foil with a purity of 99.95%) was used to wrap the 3288300100044 sample. 3288300100045 DETECTOR (SIBAR) An Au-Si surface barrier detector at an angle 3288300100046 135 deg was used to detect particles to correct small 3288300100047 variations in the neutron flux. 3288300100048 (HPGE) The efficiency of HPGe detector (ORTEC, GEM- 3288300100049 60P, USA) with the crystal length, crystal diameter, 3288300100050 energy resolution at 1.332 MeV, and comparative 3288300100051 effectiveness were 72.3 mm, 70.1 mm 1.69 keV, and 3288300100052 about 68%, respectively, was calibrated according to 3288300100053 the 152Eu, 133Ba, 137Cs, and 226Ra standard sources. 3288300100054 CORRECTION F = Fc x Fg x Fs x Fo. 3288300100055 Fc, Fg, Fs, and Fo represent the coefficients 3288300100056 reflecting the coincidence sum impact of cascade 3288300100057 g-rays, sample counting geometry, self-absorption for 3288300100058 the specific gamma-ray energy, and the solid angle of 3288300100059 neutron flux. Fo = 1.0756 3288300100060 +-----------------------------------------------------+3288300100061 Gamma-ray u/p u Correction 3288300100062 energy(keV) Fe Xe Fe No. Xe factors 3288300100063 -------------------------------------------------------3288300100064 249.79 0.1280 0.2783 1.0063 1 0.5660 1.349 3288300100065 2 0.2669 1.185 3288300100066 3 0.5430 1.336 3288300100067 4 0.2506 1.177 3288300100068 5 0.2485 1.176 3288300100069 526.56 0.0823 0.0932 0.6465 1 0.1158 1.125 3288300100070 2 0.0546 1.076 3288300100071 3 0.1111 1.121 3288300100072 4 0.0513 1.073 3288300100073 5 0.0508 1.073 3288300100074 +-----------------------------------------------------+3288300100075 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) 3288300100076 MONIT-REF (,,3,IRDFF-II,,2020) 3288300100077 DECAY-MON (41-NB-92-M,10.15D,DG,934.44,0.9915) 3288300100078 ERR-ANALYS (ERR-4) Relative g-ray intensity of monitor reaction 3288300100079 (ERR-7) Target isotopic abundance 3288300100080 (ERR-9) Efficiency of g-rays of monitor reaction 3288300100081 (MONIT-ERR) The monitor cross-section 3288300100082 HISTORY (20251124C) Compiled by Xi Tao (CNDC) 3288300100083 ENDBIB 81 0 3288300100084 COMMON 3 3 3288300100085 ERR-4 ERR-7 ERR-9 3288300100086 PER-CENT PER-CENT PER-CENT 3288300100087 0.0403 0.0621 2.5038 3288300100088 ENDCOMMON 3 0 3288300100089 ENDSUBENT 88 0 3288300199999 SUBENT 32883002 20251124 20260228 3288300200001 BIB 4 16 3288300200002 REACTION (54-XE-136(N,2N)54-XE-135-M,,SIG) 3288300200003 DECAY-DATA (54-XE-135-M,15.29MIN,DG,526.56,0.806) 3288300200004 ERR-ANALYS (ERR-T) The overall uncertainty 3288300200005 (ERR-1) The g-ray counting statistics of measured 3288300200006 reaction 3288300200007 (ERR-2) The g-ray counting statistics of monitor 3288300200008 reaction 3288300200009 (ERR-3) Relative g-ray intensity of measured reaction 3288300200010 (ERR-5) Mass of Xe 3288300200011 (ERR-6) Mass of Nb 3288300200012 (ERR-8) Efficiency of g-rays of measured reaction 3288300200013 (ERR-10) The fractional uncertainty in the timing 3288300200014 factor of target 3288300200015 (ERR-11) Timing factor of target 3288300200016 (ERR-12) Timing factor of monitor 3288300200017 STATUS (TABLE,,Junhua Luo+,J,EPJ/A,58,142,2022) Table 6 3288300200018 ENDBIB 16 0 3288300200019 COMMON 3 3 3288300200020 ERR-3 ERR-8 ERR-10 3288300200021 PER-CENT PER-CENT PER-CENT 3288300200022 0.7444 2.6711 0.0033 3288300200023 ENDCOMMON 3 0 3288300200024 DATA 11 5 3288300200025 EN EN-RSL-HW DATA ERR-T ERR-1 ERR-2 3288300200026 ERR-5 ERR-6 ERR-11 ERR-12 MONIT-ERR 3288300200027 MEV MEV MB MB PER-CENT PER-CENT 3288300200028 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3288300200029 13.5 0.2 669. 26. 0.6565 0.85233288300200030 0.0401 0.0111 0.1336 0.3911 0.6327 3288300200031 13.8 0.2 720. 30. 1.4066 0.81023288300200032 0.0869 0.0109 0.0492 0.3640 0.5615 3288300200033 14.1 0.2 751. 31. 1.3736 0.80833288300200034 0.0816 0.0112 0.1985 0.3537 0.5461 3288300200035 14.4 0.2 765. 31. 0.9184 0.81643288300200036 0.0876 0.0110 0.0423 0.3476 0.5427 3288300200037 14.8 0.2 781. 31. 0.8285 0.93153288300200038 0.0385 0.0112 0.2824 0.1851 0.5645 3288300200039 ENDDATA 14 0 3288300200040 ENDSUBENT 39 0 3288300299999 SUBENT 32883003 20251124 20260228 3288300300001 BIB 4 16 3288300300002 REACTION (54-XE-136(N,2N)54-XE-135-G,,SIG) 3288300300003 DECAY-DATA (54-XE-135-G,9.14HR,DG,249.79,0.90) 3288300300004 ERR-ANALYS (ERR-T) The overall uncertainty 3288300300005 (ERR-1) The g-ray counting statistics of measured 3288300300006 reaction 3288300300007 (ERR-2) The g-ray counting statistics of monitor 3288300300008 reaction 3288300300009 (ERR-3) Relative g-ray intensity of measured reaction 3288300300010 (ERR-5) Mass of Xe 3288300300011 (ERR-6) Mass of Nb 3288300300012 (ERR-8) Efficiency of g-rays of measured reaction 3288300300013 (ERR-10) The fractional uncertainty in the timing 3288300300014 factor of target 3288300300015 (ERR-11) Timing factor of target 3288300300016 (ERR-12) Timing factor of monitor 3288300300017 STATUS (TABLE,,Junhua Luo+,J,EPJ/A,58,142,2022) Table 7 3288300300018 ENDBIB 16 0 3288300300019 COMMON 3 3 3288300300020 ERR-3 ERR-8 ERR-10 3288300300021 PER-CENT PER-CENT PER-CENT 3288300300022 3.3333 2.5269 0.1286 3288300300023 ENDCOMMON 3 0 3288300300024 DATA 11 5 3288300300025 EN EN-RSL-HW DATA ERR-T ERR-1 ERR-2 3288300300026 ERR-5 ERR-6 ERR-11 ERR-12 MONIT-ERR 3288300300027 MEV MEV MB MB PER-CENT PER-CENT 3288300300028 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3288300300029 13.5 0.2 789. 40. 0.0469 0.85233288300300030 0.0401 0.0111 0.0012 0.3911 0.6327 3288300300031 13.8 0.2 787. 40. 0.5750 0.81023288300300032 0.0869 0.0109 0.0011 0.3640 0.5615 3288300300033 14.1 0.2 777. 39. 0.4024 0.80833288300300034 0.0816 0.0112 0.0013 0.3537 0.5461 3288300300035 14.4 0.2 742. 37. 0.0651 0.81643288300300036 0.0876 0.0110 0.0019 0.3476 0.5427 3288300300037 14.8 0.2 735. 37. 0.3622 0.93153288300300038 0.0385 0.0112 0.0023 0.1851 0.5645 3288300300039 ENDDATA 14 0 3288300300040 ENDSUBENT 39 0 3288300399999 SUBENT 32883004 20251124 20260228 3288300400001 BIB 3 5 3288300400002 REACTION 1(54-XE-136(N,2N)54-XE-135,,SIG) 3288300400003 2(54-XE-136(N,2N)54-XE-135-M/G,,SIG/RAT) 3288300400004 ERR-ANALYS1(ERR-T) Total uncertainty 3288300400005 2(DATA-ERR) Uncertainty in the isomeric ratio 3288300400006 STATUS (TABLE,,Junhua Luo+,J,EPJ/A,58,142,2022) Table 8 3288300400007 ENDBIB 5 0 3288300400008 NOCOMMON 0 0 3288300400009 DATA 8 5 3288300400010 EN EN-RSL-HW DATA 1ERR-T 1DATA 2DATA-ERR 23288300400011 MONIT MONIT-ERR 1 3288300400012 MEV MEV MB MB NO-DIM NO-DIM 3288300400013 MB MB 3288300400014 13.5 0.2 458. 48. 0.85 0.053288300400015 453.0 2.9 3288300400016 13.8 0.2 508. 49. 0.92 0.063288300400017 457.4 2.6 3288300400018 14.1 0.2 528. 50. 0.97 0.063288300400019 459.7 2.5 3288300400020 14.4 0.2 507. 48. 1.03 0.073288300400021 460.1 2.5 3288300400022 14.8 0.2 515. 48. 1.06 0.073288300400023 460.2 2.6 3288300400024 ENDDATA 14 0 3288300400025 ENDSUBENT 24 0 3288300499999 ENDENTRY 4 0 3288399999999