ENTRY B0155 20020115 B019B015500000001 SUBENT B0155001 20020115 B019B015500100001 BIB 14 46 B015500100002 TITLE Fission Isomer of Np-237. B015500100003 AUTHOR (E.MIGNECO, G.RUSSO, R.DE LEO, A.PANTALEO) B015500100004 INSTITUTE (2ITYCAT) B015500100005 REFERENCE (J,PR/C,16,1919,1977) B015500100006 FACILITY (ISOCY,2ITYMIL) B015500100007 SAMPLE Uranium Oxide Target, Enrichment in U-238 B015500100008 99.99%, Evaporated onto an Aluminium Backing of 50 B015500100009 Microgram/Cm**2. The U-Oxide Layer was 2 Mg/Cm**2 B015500100010 Thick. B015500100011 DETECTOR (GLASD,TRD) B015500100012 ADD-RES A Lifetime T=(45+-5)Ns of the Np-237 Fission Isomer B015500100013 Was Measured. B015500100014 METHOD (EXTB,EDEG,SITA) B015500100015 Al-Energy Degraders at the Entrance of the Scattering B015500100016 Chamber Reduced the Primary Beam Energy of 20 MeV. B015500100017 The Fission-In-Flight Method was Used. Fission B015500100018 Fragments Emitted Backwards are Detected by a Thin B015500100019 Annular Makrofol Foil, 10 Micrometer Thick, Placed on B015500100020 The Target Plane. Prompt Fission Yields were Measured B015500100021 With Glass Track Detectors, Placed at Several Angles B015500100022 With Respect to the Incident Beam Direction. After B015500100023 Exposure Glasses and Makrofol Foils were Etched and B015500100024 Tracks of Fission Fragments Optically Scanned. B015500100025 CORRECTION To Calculate Delayed-To-Prompt Fission Ratios the B015500100026 Detection Efficiency of the Experimental Geometry and B015500100027 The Angular Distribution of Prompt Fission Fragments B015500100028 Were Taken Into Account. The Range of Np Recoils in B015500100029 U-Oxide was Calculated to be About 110 Microgram/Cm**2.B015500100030 For Determination of Escape Efficiencies of Recoiling B015500100031 Np Nuclei Calculated Values Based on Lindhard, Sharff B015500100032 And Schiott Theory were Used (K.DAN.VIDENSK.SELSK. B015500100033 MATH.-FYS.MEDD.33,N0.14 (1963)). B015500100034 ERR-ANALYS (DATA-ERR) No Error-Analysis is Given. The SignificanceB015500100035 Of the Quoted Errors is Unknown. B015500100036 (EN-ERR). See Data-Err. B015500100037 COMMENT - Comment by the Authors - The Given Ratios are a B015500100038 Factor 1.7 Higher Than Those of K.L.Wolf and J.P.Unik,B015500100039 Phys.Lett.43B,25(1973) B015500100040 STATUS (CURVE) By Kachapag. B015500100041 HISTORY (19800710C)Nekw B015500100042 (19940727A) Some Corrections have Been Included by B015500100043 CAJAD B015500100044 (19981115A) Converted to Lower Case. Reaction Line is B015500100045 Corrected. B015500100046 (20020110A) V. Mc-Lane'S Remark is Included B015500100047 (20020115U) Last checking has been done. B015500100048 ENDBIB 46 0 B015500100049 NOCOMMON 0 0 B015500100050 ENDSUBENT 49 0 B015500199999 SUBENT B0155002 20020115 B019B015500200001 BIB 4 6 B015500200002 REACTION ((92-U-238(P,2N)93-NP-237-M,,SIG,,,EXP)/ B015500200003 (92-U-238(P,F),PR,SIG,,,EXP)) B015500200004 PART-DET (FF) B015500200005 RAD-DET (93-NP-237-M,SF) B015500200006 DECAY-DATA (93-NP-237-M,45.NSEC,SF) The Half-Life has Been B015500200007 Measured by the Authors. B015500200008 ENDBIB 6 0 B015500200009 NOCOMMON 0 0 B015500200010 DATA 4 3 B015500200011 EN EN-ERR DATA DATA-ERR B015500200012 MEV MEV NO-DIM NO-DIM B015500200013 9.78 0.46 1.E-08 3.9E-09 B015500200014 11.6 0.38 1.7E-07 1.9E-08 B015500200015 12.5 0.38 1.1E-07 2.6E-08 B015500200016 ENDDATA 5 0 B015500200017 ENDSUBENT 16 0 B015500299999 ENDENTRY 2 0 B015599999999