ENTRY 31602 20160708 31743160200000001 SUBENT 31602001 20160708 31743160200100001 BIB 13 60 3160200100002 TITLE Measurement of thermal neutron cross-sections and 3160200100003 resonance integrals for 179Hf(n,gamma)180mHf and 3160200100004 180Hf(n,gamma)181Hf reactions at the Pohang neutron 3160200100005 facility 3160200100006 AUTHOR (Van Do Nguyen,Duc Khue Pham,Tien Thanh Kim, 3160200100007 Truong Son Le, Young Seok Lee,Guinyun Kim,Youngdo Oh, 3160200100008 Hee-Seock Lee,Moo-Hyun Cho, In Soo Ko,Won Namkung) 3160200100009 INSTITUTE (3VN IPH,3KORKNU,3KORPUE) 3160200100010 (3VN VN) Institute of Engineering Physics, Hanoi 3160200100011 University of Technology, Dai Co Viet, Hanoi, Viet Nam 3160200100012 REFERENCE (J,NIM/B,266,21,2008) 3160200100013 FACILITY (LINAC,3KORPUE) Pohang Accelerator Laboratory 3160200100014 METHOD (ACTIV) the authors also used transmission method 3160200100015 lower-level discriminator 3160200100016 INC-SOURCE (PHOTO) The target was composed, of 10 Ta plates with 3160200100017 a diam. of 4.9 cm and an effective thickness of 7.4 cm 3160200100018 There was a 0.15 cm water gap between Ta plates in 3160200100019 order to cool the target effectively. The housing of 3160200100020 the target was made of titanium. This target was set 3160200100021 at the center of a cylindrical water moderator 3160200100022 contained in an aluminium cylinder with thickness of 3160200100023 0.5 cm, a diam. of 30 cm and height of 30 cm. 3160200100024 The estimated neutron yield per kW of beam power for 3160200100025 electron energies above 60 MeV at the Ta target 3160200100026 is about 1.9 x 10**12 n/s 3160200100027 SAMPLE Natural Hf metallic foils, 18 mm x 18 mm in area by 3160200100028 0.02 mm in thickness, were used as the activation 3160200100029 samples. The Au and In foils were used as the 3160200100030 standard reactions and the neutron monitors. 3160200100031 Characteristics of Hf, Au, and In foils 3160200100032 Foils Size(mm) Weight (mg) Thickness(mm) Purity(%)3160200100033 Hf 18 x 18 0.088.3 +- 0.3 0.02 99.9 3160200100034 18 x 18 0.087.8 +- 0.3 0.02 99.9 3160200100035 Au 18 x 18 0.187.4 +- 0.4 0.03 99.95 3160200100036 18 x 18 0.188.0 +- 0.4 0.03 99.95 3160200100037 In 18 x 18 0.119.0 +- 0.3 0.05 99.99 3160200100038 0.118.8 +- 0.3 0.05 99.99 3160200100039 0.119.2 +- 0.3 0.05 99.99 3160200100040 0.118.0 +- 0.3 0.05 99.99 3160200100041 0.119.5 +- 0.3 0.05 99.99 3160200100042 0.118.5 +- 0.3 0.05 99.99 3160200100043 DETECTOR (SCIN) A 6Li-ZnS(Ag) scintillator BC702 with a diam. 3160200100044 of 127 mm and a thickness of 6.35 mm mounted on an 3160200100045 EMI-93090 photomultiplier was used as a detector for 3160200100046 the neutron TOF spectrum measurement. Scintillator 3160200100047 consists of a matrix of a lithium compound enriched to 3160200100048 95% 6Li dispersed in a fine ZnS(Ag) phosphor powder. 3160200100049 MONITOR (49-IN-115(N,G)49-IN-116-M1+M2,,SIG) neutron flux 3160200100050 monitor 3160200100051 DECAY-MON (79-AU-198-G,2.69517D,DG,411.80205,0.96, 3160200100052 DG,675.8836,0.00084) 3160200100053 (49-IN-116-M1,54.29MIN,DG,416.86,0.277, 3160200100054 DG,1097.326,0.562, 3160200100055 DG,1293.558,0.844) 3160200100056 STATUS (APRVD) Entry was approved by Dr. G.Kim 3160200100057 HISTORY (20080111C) SD 3160200100058 (20100622A) SD: data units in Subent 002 were 3160200100059 corrected: mb => barn 3160200100060 (20160406A) VS. EN moved from 001 to subents. 3160200100061 EN->EN-MIN in 003 and 005. 3160200100062 ENDBIB 60 0 3160200100063 NOCOMMON 0 0 3160200100064 ENDSUBENT 63 0 3160200199999 SUBENT 31602002 20160708 31743160200200001 BIB 6 25 3160200200002 REACTION (72-HF-179(N,G)72-HF-180-M,,SIG) 3160200200003 DECAY-DATA (72-HF-180-M,5.5HR,DG,215.256,0.813, 3160200200004 DG,332.277,0.941, 3160200200005 DG,443.09,0.819, 3160200200006 DG,500.64,0.143) 3160200200007 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 3160200200008 ERR-ANALYS (ERR-T) The main sources of the uncertainties for 3160200200009 the thermal neutron cross-section measurement are 3160200200010 due to the detection efficiency, the statistical 3160200200011 error, the thermal neutron shelf-shielding factor, 3160200200012 and the decay data of the radioactive isotopes. 3160200200013 Also, total uncertainties include: 3160200200014 (ERR-1) Geometry - 0.50%; 3160200200015 (ERR-2) Mass (foil weight) - 0.30%; 3160200200016 (ERR-3) Gamma intensity - 0.89%; 3160200200017 (ERR-4) gamma-factor - 0.15%; 3160200200018 (ERR-5) Abundance - 0.04%. 3160200200019 (ERR-6) Uncertainty in detection efficiency. 3160200200020 (ERR-7) Uncertainty in thermal neutron 3160200200021 self-shielding factor. 3160200200022 (ERR-8) Uncertainty in half-life. 3160200200023 (ERR-S) Statistical uncertainty. 3160200200024 STATUS (TABLE) Data taken from Table 6 3160200200025 HISTORY (20100622A) SD: data units were corrected: mb => barn 3160200200026 (20160406A) VS. EN moved from 001. 3160200200027 ENDBIB 25 0 3160200200028 COMMON 12 6 3160200200029 EN MONIT MONIT-ERR ERR-1 ERR-2 ERR-3 3160200200030 ERR-4 ERR-5 ERR-6 ERR-7 ERR-8 ERR-S 3160200200031 EV B B PER-CENT PER-CENT PER-CENT 3160200200032 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3160200200033 0.0253 98.65 0.09 0.50 0.30 0.89 3160200200034 0.15 0.04 2.45 0.60 1.82 0.75 3160200200035 ENDCOMMON 6 0 3160200200036 DATA 2 1 3160200200037 DATA ERR-T 3160200200038 B B 3160200200039 0.424 0.018 3160200200040 ENDDATA 3 0 3160200200041 ENDSUBENT 40 0 3160200299999 SUBENT 31602003 20160708 31743160200300001 BIB 6 22 3160200300002 REACTION (72-HF-179(N,G)72-HF-180-M,,RI) 3160200300003 MONITOR (79-AU-197(N,G)79-AU-198,,RI) 3160200300004 DECAY-DATA (72-HF-180-M,5.5HR,DG,215.256,0.813, 3160200300005 DG,332.277,0.941, 3160200300006 DG,443.09,0.819, 3160200300007 DG,500.64,0.143) 3160200300008 ERR-ANALYS (ERR-T) The main sources of the uncertainties for the 3160200300009 resonance integral measurements are due to the 3160200300010 alpha-shape factor, the epithermal neutron 3160200300011 self-shielding factor, and the cadmium ratio. 3160200300012 Also, total uncertainties include: 3160200300013 * Thermal neutron self-shielding factor - 0.60%; 3160200300014 * Reference thermal neutron cross-section - 0.67%; 3160200300015 * gamma-factor 0.11 0.15 0.10 3160200300016 (ERR-1) Uncertainty in alpha-shape factor. 3160200300017 (ERR-2) Uncertainty in epithermal neutron 3160200300018 self-shielding factor. 3160200300019 (ERR-3) Uncertainty in cadmium ratio. 3160200300020 STATUS (TABLE) Data taken from Table 7 3160200300021 HISTORY (20100319A) SD: value of ERR-T was corrected 3160200300022 (0.45 -> 0.41) 3160200300023 (20160406A) VS. EN moved from 001, EN->EN-MIN 3160200300024 ENDBIB 22 0 3160200300025 COMMON 6 3 3160200300026 EN-MIN MONIT MONIT-ERR ERR-1 ERR-2 ERR-3 3160200300027 EV B B PER-CENT PER-CENT PER-CENT 3160200300028 0.5 1550. 28. 4.18 1.75 1.70 3160200300029 ENDCOMMON 3 0 3160200300030 DATA 2 1 3160200300031 DATA ERR-T 3160200300032 B B 3160200300033 6.35 0.41 3160200300034 ENDDATA 3 0 3160200300035 ENDSUBENT 34 0 3160200399999 SUBENT 31602004 20160708 31743160200400001 BIB 6 21 3160200400002 REACTION (72-HF-180(N,G)72-HF-181,,SIG) 3160200400003 MONITOR (79-AU-197(N,G)79-AU-198,,SIG) 3160200400004 DECAY-DATA (72-HF-181,42.39D,DG,133.024,0.433, 3160200400005 DG,482.182,0.8050) 3160200400006 ERR-ANALYS (ERR-T) The main sources of the uncertainties for 3160200400007 the thermal neutron cross-section measurement are 3160200400008 due to the detection efficiency, the statistical 3160200400009 error, the thermal neutron shelf-shielding factor, 3160200400010 and the decay data of the radioactive isotopes. 3160200400011 Also, total uncertainties include: 3160200400012 * Geometry - 0.50%; 3160200400013 * Mass (foil weight) - 0.30%; 3160200400014 * Half-life - 0.14%; 3160200400015 * g-factor - 0.10%; 3160200400016 * Abundance - 0.02%. 3160200400017 (ERR-1) Uncertainty in detection efficiency. 3160200400018 (ERR-2) Uncertainty in thermal neutron 3160200400019 self-shielding factor. 3160200400020 (ERR-3) Uncertainty in gamma intensity. 3160200400021 STATUS (TABLE) Data taken from Table 8 3160200400022 HISTORY (20160406A) VS. EN moved from 001. 3160200400023 ENDBIB 21 0 3160200400024 COMMON 6 3 3160200400025 EN MONIT MONIT-ERR ERR-1 ERR-2 ERR-3 3160200400026 EV B B PER-CENT PER-CENT PER-CENT 3160200400027 0.0253 98.65 0.09 2.45 0.60 1.12 3160200400028 ENDCOMMON 3 0 3160200400029 DATA 2 1 3160200400030 DATA ERR-T 3160200400031 B B 3160200400032 12.87 0.52 3160200400033 ENDDATA 3 0 3160200400034 ENDSUBENT 33 0 3160200499999 SUBENT 31602005 20160708 31743160200500001 BIB 6 18 3160200500002 REACTION (72-HF-180(N,G)72-HF-181,,RI) 3160200500003 MONITOR (79-AU-197(N,G)79-AU-198,,RI) 3160200500004 DECAY-DATA (72-HF-181,42.39D,DG,133.024,0.433, 3160200500005 DG,482.182,0.8050) 3160200500006 ERR-ANALYS (ERR-T) The main sources of the uncertainties for the 3160200500007 resonance integral measurements are due to the 3160200500008 alpha-shape factor, the epithermal neutron 3160200500009 self-shielding factor, and the cadmium ratio. 3160200500010 Also, total uncertainties include: 3160200500011 * Thermal neutron self-shielding factor - 0.60%; 3160200500012 * Reference thermal neutron cross-section - 1.48%; 3160200500013 * gamma-factor 0.11 0.15 0.10Statistical error - 1.2%.3160200500014 (ERR-1) Uncertainty in alpha-shape factor. 3160200500015 (ERR-2) Uncertainty in epithermal neutron 3160200500016 self-shielding factor. 3160200500017 (ERR-3) Uncertainty in cadmium ratio. 3160200500018 STATUS (TABLE) Data taken from Table 9 3160200500019 HISTORY (20160406A) VS. EN moved from 001, EN->EN-MIN 3160200500020 ENDBIB 18 0 3160200500021 COMMON 6 3 3160200500022 EN MONIT MONIT-ERR ERR-1 ERR-2 ERR-3 3160200500023 EV B B PER-CENT PER-CENT PER-CENT 3160200500024 0.5 1550. 28. 4.25 1.70 1.80 3160200500025 ENDCOMMON 3 0 3160200500026 DATA 2 1 3160200500027 DATA ERR-T 3160200500028 B B 3160200500029 32.91 2.38 3160200500030 ENDDATA 3 0 3160200500031 ENDSUBENT 30 0 3160200599999 ENDENTRY 5 0 3160299999999