ENTRY 32782 20200219 31953278200000001 SUBENT 32782001 20200219 31953278200100001 BIB 15 63 3278200100002 TITLE Measurement of cross sections and isomeric cross- 3278200100003 section ratios for the (n,2n) reactions on 85,87Rb in 3278200100004 energies between 13 and 15 MeV 3278200100005 AUTHOR (Junhua Luo, Li Jiang, Long He) 3278200100006 INSTITUTE (3CPRHXU,3CPRNPC) 3278200100007 REFERENCE (J,RCA,106,709,2018) 3278200100008 #doi:10.1515/ract-2018-2951 3278200100009 FACILITY (NGEN,3CPRNPC) Pd-300 Neutron Generator 3278200100010 INC-SOURCE (D-T) 3278200100011 SAMPLE The RbCl powder (99.95% pure, natural isotopic 3278200100012 composition, Aladdin Industrial Corporation) was put 3278200100013 in a sample box (material: polymethyl methacrylate). 3278200100014 Three samples with a diameter of 20 mm and six 3278200100015 monitors (niobium foil of 99.99% purity) with the 3278200100016 same diameter were prepared for irradiation. The RbCl 3278200100017 samples were 0.0672, 0.0625, and 0.0591 cm thick. 3278200100018 METHOD (ACTIV) A stack of Nb-RbCl-Nb was made from these 3278200100019 three samples and mounted at 0, 90 and 135 deg 3278200100020 relative to the beam direction. The distance from 3278200100021 sample to detector was 0-8 cm. Samples were wrapped 3278200100022 in a cadmium foil in order to reduce the contribution 3278200100023 of thermal and epithermal effects. 3278200100024 DETECTOR (HPGE) High-purity germanium gammaray spectroscopy 3278200100025 (~68% relative efficiency, 1.69 keV resolution at 3278200100026 1332.5 keV of 60Co). The detector was coupled with a 3278200100027 digital gamma spectrometry system (ORTEC, model GEM 3278200100028 60P) and Maestro data acquisition software. The 3278200100029 efficiency of the detector was precalibrated using 3278200100030 various standard gamma sources, which were 57Co, 60Co, 3278200100031 109Cd, 133Ba, 137Cs, 152Eu, 241Am and 226Ra. 3278200100032 MONITOR (41-NB-93(N,2N)41-NB-92-M,,SIG) 3278200100033 DECAY-MON (41-NB-92-M,10.15D,DG,934.44,0.9915) 3278200100034 MONIT-REF (,M.Wagner+,B,PH-DAT,13-5,,1990) 3278200100035 CORRECTION F was the total correction factor of the activity, 3278200100036 F=fs*fc*fp. fs, fc, and fp are the correction 3278200100037 factors for the selfabsorption of the sample at a 3278200100038 given gamma energy; the coincidence sum effect of 3278200100039 cascade gamma rays in the investigated nuclide 3278200100040 (84m,gRb); the attenuation of gamma rays in 3278200100041 polymethyl methacrylate (for niobium foil, fp = 1). 3278200100042 Correction factors for the self-absorption: 3278200100043 ****************************************************** 3278200100044 Samples thickness h (cm) 3278200100045 Gamma-ray energy (keV)******************************** 3278200100046 0.0672 0.0625 0.0591 3278200100047 ****************************************************** 3278200100048 248.02 1.006 1.005 1.005 3278200100049 556.07 1.003 1.003 1.002 3278200100050 881.6 1.002 1.002 1.002 3278200100051 1077.0 1.002 1.002 1.002 3278200100052 ****************************************************** 3278200100053 ERR-ANALYS (ERR-T) The total uncertainty 5.7-9.6% 3278200100054 (ERR-S,0.2,3.3) Counting statistics 0.2-3.3% 3278200100055 (ERR-1,2.0,3.0) Photopeak detection efficiency 2.0-3.0%3278200100056 (ERR-2,0.04,4.8) Relative gamma-ray intensity 0.04-4.8%3278200100057 (ERR-3,0.1,0.3) Half-life 0.1-0.3% 3278200100058 (ERR-4,0.,0.1) Sample weight <0.1% 3278200100059 (ERR-5,0.,1.0) Timing <1.0% 3278200100060 (ERR-6) Self-absorption of gamma-ray about 0.5% 3278200100061 (ERR-7,0.,0.1) Isotopic abundance <0.1% 3278200100062 (MONIT-ERR) Cross section of the monitor reaction 1.1- 3278200100063 1.5% 3278200100064 HISTORY (20200219C) Compiled by Xi Tao (CNDC) 3278200100065 ENDBIB 63 0 3278200100066 COMMON 1 3 3278200100067 ERR-6 3278200100068 PER-CENT 3278200100069 0.5 3278200100070 ENDCOMMON 3 0 3278200100071 ENDSUBENT 70 0 3278200199999 SUBENT 32782002 20200219 31953278200200001 BIB 4 9 3278200200002 REACTION 1(37-RB-85(N,2N)37-RB-84-M,,SIG) 3278200200003 2(37-RB-85(N,2N)37-RB-84-G,,SIG) 3278200200004 3(37-RB-85(N,2N)37-RB-84,,SIG) 3278200200005 4(37-RB-85(N,2N)37-RB-84-M/G,,SIG/RAT) 3278200200006 DECAY-DATA1(37-RB-84-M,20.26MIN,DG,248.02,0.63) 3278200200007 2(37-RB-84-G,32.82D,DG,881.6,0.689) 3278200200008 SAMPLE (37-RB-85,NAT=0.7217) 3278200200009 STATUS (TABLE) TABLE 1 and text (p6) of 3278200200010 Radiochim.Acta,106(9),709-717,2018. 3278200200011 ENDBIB 9 0 3278200200012 NOCOMMON 0 0 3278200200013 DATA 12 3 3278200200014 EN EN-ERR DATA 1ERR-T 1DATA 2ERR-T 23278200200015 DATA 3ERR-T 3DATA 4ERR-T 4MONIT MONIT-ERR 3278200200016 MEV MEV MB MB MB MB 3278200200017 MB MB NO-DIM NO-DIM MB MB 3278200200018 13.5 0.2 336. 19. 656. 51.3278200200019 992. 70. 0.51 0.05 457.9 6.83278200200020 14.1 0.2 387. 23. 689. 55.3278200200021 1076. 78. 0.56 0.06 459.8 6.83278200200022 14.8 0.2 428. 25. 747. 58.3278200200023 1175. 83. 0.57 0.06 459.7 5.03278200200024 ENDDATA 10 0 3278200200025 ENDSUBENT 24 0 3278200299999 SUBENT 32782003 20200219 31953278200300001 BIB 4 9 3278200300002 REACTION 1(37-RB-87(N,2N)37-RB-86-M,,SIG) 3278200300003 2(37-RB-87(N,2N)37-RB-86-G,,SIG) 3278200300004 3(37-RB-87(N,2N)37-RB-86,,SIG) 3278200300005 4(37-RB-87(N,2N)37-RB-86-M/G,,SIG/RAT) 3278200300006 DECAY-DATA1(37-RB-86-M,1.017MIN,DG,556.07,0.9821) 3278200300007 2(37-RB-86-G,18.642D,DG,1077.0,0.0864) 3278200300008 SAMPLE (37-RB-87,NAT=0.2783) 3278200300009 STATUS (TABLE) TABLE 1 and text (p7) of 3278200300010 Radiochim.Acta,106(9),709-717,2018. 3278200300011 ENDBIB 9 0 3278200300012 NOCOMMON 0 0 3278200300013 DATA 12 3 3278200300014 EN EN-ERR DATA 1ERR-T 1DATA 2ERR-T 23278200300015 DATA 3ERR-T 3DATA 4ERR-T 4MONIT MONIT-ERR 3278200300016 MEV MEV MB MB MB MB 3278200300017 MB MB NO-DIM NO-DIM MB MB 3278200300018 13.5 0.2 393. 23. 830. 76.3278200300019 1223. 99. 0.47 0.05 457.9 6.83278200300020 14.1 0.2 421. 27. 888. 67.3278200300021 1309. 94. 0.47 0.06 459.8 6.83278200300022 14.8 0.2 449. 28. 906. 87.3278200300023 1355. 115. 0.50 0.06 459.7 5.03278200300024 ENDDATA 10 0 3278200300025 ENDSUBENT 24 0 3278200399999 ENDENTRY 3 0 3278299999999