ENTRY 23403 20180905 22712340300000001 SUBENT 23403001 20180905 22712340300100001 BIB 13 53 2340300100002 TITLE Anomalies in the Charge Yields of Fission Fragments 2340300100003 from the 238U(n,f) Reaction 2340300100004 AUTHOR (J.N.Wilson,M.Lebois,L.Qi,P.Amador-Celdran,D.Bleuel, 2340300100005 J.A.Briz,R.Carroll,W.Catford,H.De Witte,D.T.Doherty, 2340300100006 R.Eloirdi,G.Georgiev,A.Gottardo,A.Goasduff, 2340300100007 K.Ha Dynska-Klek,K.Hauschild,H.Hess,V.Ingeberg, 2340300100008 T.Konstantinopoulos, J.Ljungvall,A.Lopez-Martens, 2340300100009 G.Lorusso,R.Lozeva,R.Lutter,P.Marini, I.Matea, 2340300100010 T.Materna,L.Mathieu,A.Oberstedt,S.Oberstedt, 2340300100011 S.Panebianco, Zs.Podolyak,A.Porta,P.H.Regan,P.Reiter, 2340300100012 K.Rezynkina,S.J.Rose, E.Sahin,M.Seidlitz,O.Serot, 2340300100013 R.Shearman,B.Siebeck,S.Siem,A.G.Smith,G.M.Tveten, 2340300100014 D.Verney,N.Warr,F.Zeiser,M.Zielinska) 2340300100015 INSTITUTE (2FR PAR,2ZZZITU,1USALRL,2FR NTE,2UK SUR,2BLGLEU, 2340300100016 2FR SAC,2FR CSN,2ITYPAD,2GERKLN,2NOROSL,2UK NPL, 2340300100017 2GERMUU,2FR BRC,2FR GRA,2ZZZGEL,2FR CAD,2UK MAN) 2340300100018 (3RUMRUM) Extreme Light Infrastructure-Nuclear 2340300100019 Physics (ELI-NP), 077125 Bucharest-Magurele, Romania 2340300100020 REFERENCE (J,PRL,118,222501,2017) 2340300100021 #doi:10.1103/PhysRevLett.118.222501 2340300100022 FACILITY (VDGT,2FR PAR) ALTO facility, IPN Orsay. 2340300100023 INC-SOURCE (P-LI7) LICORNE neutron source. A 16.75 MeV 7Li beam 2340300100024 with 32 nA current pulsed with 2 ns in 400 ns period 2340300100025 on hydrogen gas cell 3.5 cm long and with a H2 pressure2340300100026 of 1.5 atm separated from the beam line vacuum by a 2340300100027 very thin tantalum foil of 2.7 mu-m. 2340300100028 INC-SPECT The neutrons with mean energy of 1.72 MeV and spread of2340300100029 1 MeV at half maximum are emitted forward direction 2340300100030 with maximum cone opening angle of 19.5 degree. 2340300100031 Fluxes of 2.0x10**6 n/s/cm2 at the center of the 2340300100032 MINIBALL array were calculated by GEANT IV. 2340300100033 SAMPLE (92-U-238,ENR=0.998) A 31.35 g depleted uranium 2340300100034 sample in the shape of half cylinder of radius 0.57 2340300100035 cm and length 2.98 cm was placed at 1.5 cm from the 2340300100036 end of the gas cell in the center of the MINIBALL 2340300100037 spectrometer. 2340300100038 DETECTOR (GE) The MINIBALL spectrometer consists of 24 large- 2340300100039 volume germanium crystals arranged in eight triple 2340300100040 clusters at a distance of 14 cm from the array center, 2340300100041 covering around 33% of 4pisr in solid angle. The total 2340300100042 full energy peak efficiency of 5.6% and the 2340300100043 peak-to-total ratio of 0.22 at 1.33 MeV. 2340300100044 METHOD (COINC) Independent yields were deduced from measuring 2340300100045 the intensities of all observable transitions feeding 2340300100046 each 2+ state, coincident with the corresponding 2340300100047 2+->0+ transition. 2340300100048 CORRECTION Corrections were applied for: 2340300100049 - absolute detector efficiency; 2340300100050 - self-shielding effects of the 238U sample; 2340300100051 - isomeric states contribution. 2340300100052 PART-DET (G) 2340300100053 HISTORY (20180907R) Numerical data received from J.N.Wilson 2340300100054 (20180905C) VS 2340300100055 ENDBIB 53 0 2340300100056 COMMON 2 3 2340300100057 EN-MEAN EN-RSL-FW 2340300100058 MEV MEV 2340300100059 1.72 1. 2340300100060 ENDCOMMON 3 0 2340300100061 ENDSUBENT 60 0 2340300199999 SUBENT 23403002 20180905 22712340300200001 BIB 3 10 2340300200002 REACTION (92-U-238(N,F)ELEM/MASS,IND,FY) 2340300200003 ERR-ANALYS (ERR-T) The total uncertainties were determined 2340300200004 from the following partial uncertainties: 2340300200005 - Absolute normalization of the yield. 2340300200006 - Statistical uncertainties of the observed peak and 2340300200007 the background. 2340300200008 (ERR-1,5.,20.) MINIBALL efficiency including sample 2340300200009 self shielding. Typically around 5% up to 20% below 2340300200010 200 keV. 2340300200011 STATUS (TABLE) Fig. 3 of. Phys. Rev. Lett. 118(2017)222501 2340300200012 ENDBIB 10 0 2340300200013 NOCOMMON 0 0 2340300200014 DATA 4 40 2340300200015 ELEMENT MASS DATA ERR-T 2340300200016 NO-DIM NO-DIM PC/FIS PC/FIS 2340300200017 32. 80. 0.05 0.02 2340300200018 32. 82. 0.07 0.01 2340300200019 34. 84. 0.14 0.01 2340300200020 34. 86. 0.55 0.02 2340300200021 34. 88. 0.30 0.01 2340300200022 36. 88. 0.23 0.02 2340300200023 36. 90. 1.69 0.02 2340300200024 36. 92. 1.88 0.02 2340300200025 36. 94. 0.48 0.02 2340300200026 36. 96. 0.18 0.03 2340300200027 38. 92. 0.11 0.02 2340300200028 38. 94. 1.41 0.02 2340300200029 38. 96. 2.74 0.02 2340300200030 38. 98. 2.98 0.16 2340300200031 40. 96. 0.06 0.01 2340300200032 40. 98. 0.41 0.02 2340300200033 40. 100. 3.70 0.17 2340300200034 40. 102. 3.91 0.22 2340300200035 40. 104. 0.62 0.18 2340300200036 42. 102. 0.23 0.16 2340300200037 42. 104. 0.79 0.07 2340300200038 42. 106. 0.19 0.07 2340300200039 50. 128. 0.03 0.01 2340300200040 50. 130. 0.45 0.03 2340300200041 50. 132. 0.07 0.02 2340300200042 52. 130. 0.34 0.02 2340300200043 52. 132. 2.11 0.17 2340300200044 52. 134. 4.20 0.22 2340300200045 52. 136. 3.91 0.09 2340300200046 52. 138. 0.73 0.07 2340300200047 54. 136. 0.28 0.02 2340300200048 54. 138. 1.74 0.07 2340300200049 54. 140. 4.24 0.11 2340300200050 54. 142. 1.57 0.21 2340300200051 56. 142. 0.43 0.11 2340300200052 56. 144. 2.62 0.19 2340300200053 56. 146. 2.29 0.24 2340300200054 56. 148. 0.59 0.17 2340300200055 58. 148. 0.97 0.30 2340300200056 58. 150. 0.99 0.30 2340300200057 ENDDATA 42 0 2340300200058 ENDSUBENT 57 0 2340300299999 SUBENT 23403003 20180910 22712340300300001 BIB 4 11 2340300300002 REACTION (92-U-238(N,F)ELEM,CHG,FY) 2340300300003 ANALYSIS (CHGDS) Double-Gaussian fits to each fragment pair 2340300300004 with five free parameters: widths, heights, and 2340300300005 positions could vary, but the areas of the two 2340300300006 Gaussians were constrained to be equal, thus assuming 2340300300007 charge conservation and no proton emission from the 2340300300008 deexciting fragments. 2340300300009 ERR-ANALYS (DATA-ERR) No information on sources of uncertainties. 2340300300010 STATUS (TABLE) Numerical data received from J. Wilson. 2340300300011 Presented on Fig. 3. 2340300300012 (DEP,23403002) 2340300300013 ENDBIB 11 0 2340300300014 NOCOMMON 0 0 2340300300015 DATA 3 12 2340300300016 ELEMENT DATA DATA-ERR 2340300300017 NO-DIM PC/FIS PC/FIS 2340300300018 32. 0.2 0.06 2340300300019 34. 2.04 0.06 2340300300020 36. 8.79 0.07 2340300300021 38. 16.2 0.40 2340300300022 40. 21.5 0.40 2340300300023 42. 1.22 0.07 2340300300024 50. 1.22 0.07 2340300300025 52. 21.5 0.40 2340300300026 54. 16.2 0.40 2340300300027 56. 8.79 0.07 2340300300028 58. 2.04 0.06 2340300300029 60. 0.2 0.03 2340300300030 ENDDATA 14 0 2340300300031 ENDSUBENT 30 0 2340300399999 ENDENTRY 3 0 2340399999999