ENTRY 14826 20240314 1482600000001 SUBENT 14826001 20240314 20250110 1482600100001 BIB 13 43 1482600100002 TITLE Cumulative fission yields of short-lived fission 1482600100003 products from 235U and 239Pu measured by HPGe 1482600100004 gamma-ray spectroscopy 1482600100005 AUTHOR (S.Kim,S.J.Martoff,M.Dion,D.Glasgow) 1482600100006 REFERENCE (J,NIM/A,1059,169001,2024) 1482600100007 #doi:10.1016/j.nima.2023.169001 1482600100008 INSTITUTE (1USABNL,1USATEM,1USAORL) 1482600100009 FACILITY (REAC,1USAORL) The PT-2 pneumatic tube of the High 1482600100010 Flux Isotope Reactor (HFIR) at the Neutron Activation 1482600100011 Analysis laboratory (NAA) of Oak Ridge National 1482600100012 Laboratory. 1482600100013 INC-SOURCE (REAC) The measured thermal and epithermal neutron 1482600100014 fluxes at the irradiation location are 4.59*10**13 1482600100015 n/cm2/s and 1.96*10**11 n/cm2/s respectively for 235U, 1482600100016 and 4.43*10**13 n/cm2/s and 3.24*10**11 n/cm2/s 1482600100017 respectively for 239Pu. The energy ranges for 1482600100018 epithermal neutrons are 0.1 eV to 10 keV for 239Pu 1482600100019 and 1 eV to 10 keV for 235U. The neutron fluxes are 1482600100020 measured using manganese and gold activation foils. 1482600100021 DETECTOR (HPGE) A 44% relative efficiency, ORTEC p-type 1482600100022 coaxial HPGe detector with an aluminum end cap. 1482600100023 SAMPLE The 235U sample consists of 252.72 nanograms of 1482600100024 natural uranium nitrate in an Inductively Coupled 1482600100025 Plasma calibration solution. The 239Pu sample 1482600100026 consists of 301.3 nanogram of National Institute of 1482600100027 Standards and Technology (NIST) Certified Reference 1482600100028 Material (CRM-137). 1482600100029 METHOD (ACTIV) Each sample is irradiated for 30 s, and then 1482600100030 transported to the detector chamber using the 1482600100031 pneumatic tube transfer system which introduces a 1482600100032 20-s delay prior to the gamma-ray measurement. The 1482600100033 gamma rays are measured with a coaxial HPGe detector. 1482600100034 Each sample is placed at 33 cm above the detector and 1482600100035 measured for 30 s. 1482600100036 ERR-ANALYS (DATA-ERR) The uncertainty in the expected gamma-ray 1482600100037 yield is evaluated through a quadrature sum of 1482600100038 uncertainties in the total number of nuclides present 1482600100039 at the end of irradiation, the absolute efficiency of 1482600100040 the HPGe, and and the gamma emission intensity. 1482600100041 DECAY-DATA (38-SR-95,23.90SEC,DG,685.6,0.226) 1482600100042 (55-CS-140,63.7SEC,DG,602.25,0.53) 1482600100043 STATUS (APRVD) Approved by Samuel Kim on March 25, 2024. 1482600100044 HISTORY (20240314C) BP 1482600100045 ENDBIB 43 0 1482600100046 COMMON 1 3 1482600100047 EN-DUMMY 1482600100048 EV 1482600100049 0.0253 1482600100050 ENDCOMMON 3 0 1482600100051 ENDSUBENT 50 0 1482600199999 SUBENT 14826002 20240314 20250110 1482600200001 BIB 2 2 1482600200002 REACTION (92-U-235(N,F)ELEM/MASS,CUM,FY) 1482600200003 STATUS (TABLE,,S.Kim+,J,NIM/A,1059,169001,2024) Authors data. 1482600200004 ENDBIB 2 0 1482600200005 NOCOMMON 0 0 1482600200006 DATA 4 2 1482600200007 ELEMENT MASS DATA DATA-ERR 1482600200008 NO-DIM NO-DIM PRD/FIS PRD/FIS 1482600200009 38.0 95.0 0.056 0.010 1482600200010 55.0 140.0 0.063 0.014 1482600200011 ENDDATA 4 0 1482600200012 ENDSUBENT 11 0 1482600299999 SUBENT 14826003 20240314 20250110 1482600300001 BIB 2 2 1482600300002 REACTION (94-PU-239(N,F)ELEM/MASS,CUM,FY) 1482600300003 STATUS (TABLE,,S.Kim+,J,NIM/A,1059,169001,2024) Authors data. 1482600300004 ENDBIB 2 0 1482600300005 NOCOMMON 0 0 1482600300006 DATA 4 2 1482600300007 ELEMENT MASS DATA DATA-ERR 1482600300008 NO-DIM NO-DIM PRD/FIS PRD/FIS 1482600300009 38.0 95.0 0.04 0.01 1482600300010 55.0 140.0 0.05 0.01 1482600300011 ENDDATA 4 0 1482600300012 ENDSUBENT 11 0 1482600399999 ENDENTRY 3 0 1482699999999