ENTRY 23261 20150501 22442326100000001 SUBENT 23261001 20150501 22442326100100001 BIB 15 54 2326100100002 TITLE Measurements of Capture Gamma Rays from the Neutron 2326100100003 Resonances of 74Se and 77Se at the J-PARC/MLF/ANNRI. 2326100100004 AUTHOR (J.Hori,H.Yashima,S.Nakamura,K.Furutaka,K.Y.Hara, 2326100100005 H.Harada,K.Hirose,A.Kimura,F.Kitatani,M.Koizumi, 2326100100006 M.Oshima,Y.Toh,M.Igashira,T.Katabuchi,M.Mizumoto, 2326100100007 T.Kamiyama,K.Kino,Y.Kiyanagi) 2326100100008 INSTITUTE (2JPNKTO) J.Hori,H.Yashima 2326100100009 (2JPNJAE) H.Yashima,S.Nakamura,K.Furutaka,K.Y.Hara, 2326100100010 H.Harada,K.Hirose,A.Kimura,F.Kitatani, 2326100100011 M.Koizumi,M.Oshima,Y.Toh 2326100100012 (2JPNTIT) M.Igashira,T.Katabuchi,M.Mizumoto 2326100100013 (2JPNHOK) T.Kamiyama,K.Kino,Y.Kiyanagi 2326100100014 REFERENCE (J,NDS,119,128,2014) 2326100100015 #doi:10.1016/j.nds.2014.08.036 2326100100016 REL-REF (I,,A.Kimura+,J,NST,49,708,2012) 2326100100017 FACILITY (SYNCH,2JPNJAE) 2326100100018 Accurate Neutron-Nucleus Reaction measurement 2326100100019 Instrument (ANNRI) at Japan Proton Accelerator 2326100100020 Research Complex (J-PARC). J-PARC was operated at a 2326100100021 beam power of 280 kW, a pulse width of 100 ns in the 2326100100022 'double-bunch mode' and a repetition rate of 25 Hz. 2326100100023 The interval between double-bunched pulses was 600 ns. 2326100100024 INC-SOURCE (SPALL) Neutron beam line No.4(BL04) of the Materials 2326100100025 and Life Science Experimental Facility (MLF) in the 2326100100026 Japan Proton Accelerator Research Complex (J-PARC) . 2326100100027 The neutron beam was collimated to a diameter of 7mm at2326100100028 the sample position. 2326100100029 SAMPLE Metal sintered disks of 5 mm diameter. 2326100100030 Each sample was sealed in a bag of fluorinated ethylene2326100100031 propylene (FEP) films and fixed to a sample folder. 2326100100032 A NaCl sample of 5mm diameter, 500mg weight was used to2326100100033 define the full-energy-peak efficiency via the relative2326100100034 intensities of prompt gamma rays from the 35Cl(n,gamma)2326100100035 reaction at thermal neutron energy. 2326100100036 The total measuring time for thin and thick 74Se 2326100100037 samples, 77Se sample, NaCl sample were 32.0, 17.2, 2326100100038 35.7, 2.6 hours, respectively. 2326100100039 METHOD (TOF,PHD) TOF and PH spectra were measured. 2326100100040 DETECTOR (D4PI) 4PI Ge spectrometer: 2326100100041 two cluster-Ge detectors, eight coaxial-Ge detectors, 2326100100042 surrounded by BGO compton-suppression detectors. 2326100100043 Located at 21.5m from the center of a moderator at 2326100100044 Japan Spallation Neutron Source (JSNS). 2326100100045 ANALYSIS The relative intensity of each primary transition was 2326100100046 obtained by dividing the net peak counts by the 2326100100047 full energy-peak efficiency. The relative intensity was2326100100048 normalized so that the sum of them was 100 %. 2326100100049 ERR-ANALYS Uncertainty in the correction factors of the 2326100100050 self-shielding - 5%. 2326100100051 CORRECTION For dead-time. 2326100100052 For backgrounds. 2326100100053 COMMENT This work was supported by JSPS KAKENHI Grant Number 2326100100054 22226016 . 2326100100055 HISTORY (20150501C) M.M. 2326100100056 ENDBIB 54 0 2326100100057 NOCOMMON 0 0 2326100100058 ENDSUBENT 57 0 2326100199999 SUBENT 23261002 20150501 22442326100200001 BIB 6 21 2326100200002 REACTION (34-SE-74(N,G)34-SE-75,,SPC,,RES/REL) 2326100200003 Observed primary gamma-rays from the 27-eV resonance. 2326100200004 The relative intensity was normalized so that the sum 2326100200005 of them was 100 %. 2326100200006 REL-REF (D,12728012,G.Engler+,J,NP/A,372,125,1981) 2326100200007 Re-normalized for comparison. 2326100200008 The previous relative intensities of Engler+ are 2326100200009 consistent with the present data above 6 MeV, but for 2326100200010 lower energies they are larger than the present ones by2326100200011 a factor of two, or were not observed. 2326100200012 SAMPLE Isotopic enriched samples of 74Se(99.96%). 2326100200013 74Se samples weights of 0.25 mg and 89.0 mg. 2326100200014 In the thin sample, carbon powder with a weight of 10mg2326100200015 was mixed as a dilution material. 2326100200016 ANALYSIS The relative intensity of each primary transition was 2326100200017 obtained by dividing the net peak counts by the 2326100200018 full energy-peak efficiency. The relative intensity was2326100200019 normalized so that the sum of them was 100 %. 2326100200020 ERR-ANALYS (DATA-ERR) Not specified. 2326100200021 STATUS (TABLE) Table I J,NDS,119,128,2014. 2326100200022 (PRELM) Preliminary result. 2326100200023 ENDBIB 21 0 2326100200024 COMMON 1 3 2326100200025 EN-RES 2326100200026 KEV 2326100200027 27. 2326100200028 ENDCOMMON 3 0 2326100200029 DATA 5 18 2326100200030 E E-ERR DATA DATA-ERR LVL-FIN 2326100200031 KEV KEV ARB-UNITS ARB-UNITS KEV 2326100200032 7734.9 1.1 52.5 1.9 293.1 2326100200033 7006.9 1.3 5.6 0.5 1020.5 2326100200034 6829.3 1.0 4.9 0.4 1198.5 2326100200035 6438.6 1.0 8.9 0.5 1589.5 2326100200036 6226.2 1.1 4.2 0.4 1802.1 2326100200037 6041.5 1.0 1.3 0.3 1986.0 2326100200038 5998.2 1.0 0.9 0.3 2030.4 2326100200039 5860.9 1.0 1.5 0.3 2166.7 2326100200040 5571.1 1.0 2.4 0.3 2456.4 2326100200041 5462.2 1.0 1.6 0.3 2565.4 2326100200042 5429.8 1.0 2.5 0.3 2597.8 2326100200043 5395.8 1.0 1.2 0.3 2631.8 2326100200044 5290.2 1.0 0.9 0.2 2737.4 2326100200045 5245.5 1.0 1.4 0.3 2782.1 2326100200046 4926.6 1.0 3.4 0.4 3101.0 2326100200047 4876.0 1.0 2.7 0.4 3152.6 2326100200048 4694.5 0.9 1.8 0.3 3333.1 2326100200049 4408.2 0.9 2.4 0.4 3619.4 2326100200050 ENDDATA 20 0 2326100200051 ENDSUBENT 50 0 2326100299999 SUBENT 23261003 20150501 22442326100300001 BIB 4 9 2326100300002 REACTION (34-SE-74(N,0),,EN) 2326100300003 SAMPLE Isotopic enriched samples of 74Se(99.96%). 2326100300004 74Se samples weights of 0.25 mg and 89.0 mg. 2326100300005 In the thin sample, carbon powder with a weight of 10mg2326100300006 was mixed as a dilution material. 2326100300007 ANALYSIS Four new resonances were observed in TOF spectrum 2326100300008 corresponding to the 278-keV photo peak - see Fig.6. 2326100300009 STATUS (TABLE) Text,page 131 of J,NDS,119,128,2014. 2326100300010 (PRELM) Preliminary result. 2326100300011 ENDBIB 9 0 2326100300012 NOCOMMON 0 0 2326100300013 DATA 1 4 2326100300014 DATA 2326100300015 EV 2326100300016 6. 2326100300017 123. 2326100300018 436. 2326100300019 640. 2326100300020 ENDDATA 6 0 2326100300021 ENDSUBENT 20 0 2326100399999 SUBENT 23261004 20150501 22442326100400001 BIB 6 12 2326100400002 REACTION (34-SE-77(N,G)34-SE-78,,SPC,,RES/REL) 2326100400003 Relative intensities of the observed primary gamma-ray 2326100400004 transitions for the resonances of 77Se - 113eV(1+), 2326100400005 212eV(0+), 291eV(1+), 342eV(1+), 690eV(0+), 864eV(1+). 2326100400006 SAMPLE Isotopic enriched sample of 77Se(99.2%), weight 87.2mg.2326100400007 ANALYSIS The relative intensities were defined from the measured2326100400008 TOF and PH spectra. 2326100400009 REL-REF (R,,A.R.Farhan,J,NDS,110,1917,2009) 2326100400010 Data of energies, spin and parity of final states. 2326100400011 ERR-ANALYS (DATA-ERR) Not specified. 2326100400012 STATUS (TABLE) Table II J,NDS,119,128,2014. 2326100400013 (PRELM) Preliminary result. 2326100400014 ENDBIB 12 0 2326100400015 NOCOMMON 0 0 2326100400016 DATA 4 32 2326100400017 EN-RES E-LVL-FIN DATA DATA-ERR 2326100400018 EV MEV ARB-UNITS ARB-UNITS 2326100400019 113. 0. 1.9 0.4 2326100400020 113. 1309. 5.3 0.6 2326100400021 113. 1499. 19.1 1.1 2326100400022 113. 1996. 23.3 1.4 2326100400023 113. 2327. 11.7 1.0 2326100400024 113. 2537. 11.4 0.8 2326100400025 113. 2648. 4.8 0.7 2326100400026 113. 3440. 6.2 0.6 2326100400027 113. 3592. 5.7 0.6 2326100400028 113. 3624. 5.9 0.6 2326100400029 113. 3687. 4.8 0.6 2326100400030 212. 3440. 41.7 2.3 2326100400031 212. 4153. 18.8 1.7 2326100400032 212. 4245. 20.2 1.8 2326100400033 212. 4367. 19.3 1.9 2326100400034 291. 0. 18.3 1.8 2326100400035 291. 614. 55.4 3.7 2326100400036 291. 2327. 12.7 1.5 2326100400037 291. 2839. 3.9 1.1 2326100400038 291. 3524. 9.7 1.4 2326100400039 342. 614. 75.3 2.9 2326100400040 342. 1309. 6.9 1.1 2326100400041 342. 3006. 11.9 0.8 2326100400042 342. 3895. 5.9 0.7 2326100400043 690. 3130. 38.2 5.4 2326100400044 690. 3624. 61.8 6.0 2326100400045 864. 1309. 25.2 2.8 2326100400046 864. 2327. 19.8 2.2 2326100400047 864. 2839. 13.0 1.7 2326100400048 864. 3288. 18.9 2.3 2326100400049 864. 4182. 17.6 2.2 2326100400050 864. 4297. 5.5 1.1 2326100400051 ENDDATA 34 0 2326100400052 ENDSUBENT 51 0 2326100499999 ENDENTRY 4 0 2326199999999