ENTRY 14268 20100426 13661426800000001 SUBENT 14268001 20100426 13661426800100001 BIB 9 31 1426800100002 TITLE Measurement of gamma-emission branching ratios for 1426800100003 154,156,158Gd compound nuclei: Tests of surrogate 1426800100004 nuclear reaction approximations for (n,gamma) cross 1426800100005 sections 1426800100006 AUTHOR (N.D.Scielzo,J.E.Escher,J.M.Allmond,M.S.Basunia, 1426800100007 C.W.Beausang,L.A.Bernstein,D.L.Bleuel,J.T.Burke, 1426800100008 R.M.Clark,F.S.Dietrich,P.Fallon,J.Gi Belin, 1426800100009 B.L.Goldblum,S.R.Lesher,M.A.Mcmahan,E.B.Norman, 1426800100010 L.Phair,E.Rodriquez-Vieitez,S.A.Sheets,I.J.Thompson, 1426800100011 M.Wiedeking) 1426800100012 INSTITUTE (1USALRL,1USABRK) 1426800100013 (1USAUSA) University of Richmond, Richmond, Virginia 1426800100014 REFERENCE (J,PR/C,81,034608,2010) 1426800100015 FACILITY (CYCLO,1USABRK) Experiment performed the 88-Inch 1426800100016 Cyclotron at the Lawrence Berkeley National Laboratory.1426800100017 DETECTOR (TELES,SI,SI,SI)Scattered protons were detected 1426800100018 using the Silicon Telescope Array for Reaction 1426800100019 Studies (STARS) arranged in dE-E1-E2 configuration 1426800100020 (HPGE) Gamma rays were detected using Livermore- 1426800100021 Berkeley Array for Collaborative Experiments 1426800100022 (LiBerACE), which consisted of five clover-type high 1426800100023 purity germanium (HPGe) detectors with bismuth- 1426800100024 germanate-oxide (BGO) Compton-suppression shields. 1426800100025 METHOD (EDE,COINC) Coincidence between protons detected in 1426800100026 STARS and gamma ray, detected in LiBerACE was required 1426800100027 ANALYSIS (SURGT)The aim of the experiment was to study 1426800100028 possibilities of surrogate method for (n,gamma) cross 1426800100029 section determination. In analysis a simplified 1426800100030 Weisskopf-Ewing approach which neglect spin/parity 1426800100031 effects in nuclear reactions was used. 1426800100032 HISTORY (20100426C) Compiled by S.H. 1426800100033 ENDBIB 31 0 1426800100034 NOCOMMON 0 0 1426800100035 ENDSUBENT 34 0 1426800199999 SUBENT 14268002 20100426 13661426800200001 BIB 2 8 1426800200002 REACTION (64-GD-155(N,G)64-GD-156,,SIG) 1426800200003 STATUS (UNOBT) Measured gamma ray emission probabilities for 1426800200004 154,156 and 158 Gd are presented in fig. 7. Cross 1426800200005 sections presented in fig. 8 are derived from these 1426800200006 probabilities using surrogate method. Cross section 1426800200007 data are not final, since more sophisticated analysis 1426800200008 is planned. Present results differ by factor of two 1426800200009 from other experimental data. 1426800200010 ENDBIB 8 0 1426800200011 NOCOMMON 0 0 1426800200012 NODATA 0 0 1426800200013 ENDSUBENT 12 0 1426800299999 SUBENT 14268003 20100426 13661426800300001 BIB 2 8 1426800300002 REACTION (64-GD-157(N,G)64-GD-158,,SIG) 1426800300003 STATUS (UNOBT) Measured gamma ray emission probabilities for 1426800300004 154,156 and 158 Gd are presented in fig. 7. Cross 1426800300005 sections presented in fig. 8 are derived from these 1426800300006 probabilities using surrogate method. Cross section 1426800300007 data are not final, since more sophisticated analysis 1426800300008 is planned. Present results differ by factor of two 1426800300009 from other experimental data. 1426800300010 ENDBIB 8 0 1426800300011 NOCOMMON 0 0 1426800300012 NODATA 0 0 1426800300013 ENDSUBENT 12 0 1426800399999 ENDENTRY 3 0 1426899999999