ENTRY L0155 20110831 L016L015500000001 SUBENT L0155001 20110831 L016L015500100001 BIB 13 42 L015500100002 TITLE Nuclear resonance fluorescence of 237Np L015500100003 AUTHOR (C.T.Angell,R.Yee,T.H.Joshi,E.Swanberg,E.B.Norman, L015500100004 C.L.Hicks Jr,A.Klimenko,S.Korbly,C.Wilson,W.D.Kulp, L015500100005 G.A.Warren,T.H.Bray,R.Copping,P.A.Glans,T.Tyliszczak, L015500100006 D.K.Shuh) L015500100007 INSTITUTE (1USABRK,1USAGIT,1USABNW,1USALRL) L015500100008 (1USAUSA) Passport Systems Inc,Billerica,Massachusetts L015500100009 REFERENCE (J,PR/C,82,054310,2010) L015500100010 FACILITY (VDG,1USAMIT) Experiment performed at Van de Graaff L015500100011 electron accelerator at the High Voltage L015500100012 Research Laboratory at the Massachusetts Institute L015500100013 of Technology. Bremsstrahlung photons were produced by L015500100014 impinging an electron beam onto a radiator consisting L015500100015 of 102-mum Au backed by 1-cm Cu L015500100016 DETECTOR (HPGE) Scattered gamma rays were measured with four L015500100017 HPGe detectors with 100% relative efficiency placed at L015500100018 120 deg backward angles. Two detectors were placed on L015500100019 each side in a 61 cm thick Pb shielding to shield the L015500100020 detectors from the intense bremsstrahlung source. An L015500100021 additional 18 cm of tungsten was placed between the L015500100022 radiator and detectors L015500100023 SAMPLE Two targets were used, both consisted of NpO2 powder L015500100024 doubly encapsulated in polyethylene vial. The larger L015500100025 sample (9 g NpO2) was placed upstream of the smaller L015500100026 one (2 g NpO2) at 80.0 and 83.3 cm from the radiator, L015500100027 respectively. Two targets were placed back to back L015500100028 in the beamline. L015500100029 ERR-ANALYS (DATA-ERR) No information given L015500100030 INC-SOURCE (BRST) Bremsstrahlung photons were produced by L015500100031 electron beam impinging onto a radiator consisting L015500100032 of 102 mum Au backed by 1-cm Cu (used for cooling and L015500100033 electron cleanup).The bremsstrahlung photons L015500100034 immediately pass through a 20-cm long lead collimator L015500100035 with a 2.5 deg half angle conical opening. Average L015500100036 beam currents were of the order of 50 mu-A L015500100037 MONITOR (73-TA-188(G,SCT),PAR,ARE) L015500100038 MONIT-REF (,A.Wolpert+,J,PR/C,58,765,1998) L015500100039 ANALYSIS Energy dependent incident photon flux was obtained by L015500100040 normalizing the Schiff formula for bremstrahlung L015500100041 production to a known line (2297 keV) in 181Ta. L015500100042 HISTORY (20100202C) Compiled by S.H. L015500100043 (20110727A) OS. Monitor coding corrected L015500100044 ENDBIB 42 0 L015500100045 COMMON 1 3 L015500100046 EN-MAX L015500100047 MEV L015500100048 2.8 L015500100049 ENDCOMMON 3 0 L015500100050 ENDSUBENT 49 0 L015500199999 SUBENT L0155002 20100202 L015L015500200001 BIB 2 2 L015500200002 REACTION (93-NP-237(G,SCT),PAR,ARE) L015500200003 STATUS (TABLE) data taken from tab. 1 of the reference L015500200004 ENDBIB 2 0 L015500200005 COMMON 2 3 L015500200006 E-NRM MONIT L015500200007 KEV B*EV L015500200008 2211. 23.6 L015500200009 ENDCOMMON 3 0 L015500200010 DATA 4 15 L015500200011 E E-ERR DATA DATA-ERR L015500200012 KEV KEV B*EV B*EV L015500200013 1697.8 0.5 5.3 1.4 L015500200014 1728.8 0.2 0.6 2.3 L015500200015 1739.7 0.4 4.8 1.4 L015500200016 1827.1 0.6 5.7 1.4 L015500200017 1861.9 0.3 5.6 1.5 L015500200018 1925.9 0.8 6.1 1.5 L015500200019 2179.5 0.7 7.2 1.8 L015500200020 2252.0 0.3 7.3 1.6 L015500200021 2261.5 0.5 7.8 1.9 L015500200022 2288.2 0.3 4.6 1.1 L015500200023 2375.5 0.3 4.9 1.2 L015500200024 2378.0 0.3 2.7 0.7 L015500200025 2381.5 0.3 2.7 0.7 L015500200026 2402.3 0.4 4.4 1.1 L015500200027 2506.0 0.7 3.8 1.0 L015500200028 ENDDATA 17 0 L015500200029 ENDSUBENT 28 0 L015500299999 ENDENTRY 2 0 L015599999999