ENTRY L0173 20120523 L020L017300000001 SUBENT L0173001 20120523 L020L017300100001 BIB 13 28 L017300100002 TITLE Photomesonic Fission of Bismuth L017300100003 AUTHOR (G.Bernardini,R.Reitz,E.Segre) L017300100004 INSTITUTE (1USAUI) L017300100005 REFERENCE (J,PR,90,(4),573,1953) L017300100006 #doi:10.1103/PhysRev.90.573 L017300100007 REL-REF (R,,J.Jungerman,J,PR,79,632,1950) L017300100008 FACILITY (BETAT,1USAAUI) L017300100009 INC-SOURCE (BRST) L017300100010 METHOD (FISCT) The Ilford emulsions loaded with bismuth were L017300100011 exposed to the beam of Illinois betatron. The plates L017300100012 were developed with the usual Occhialini temperature L017300100013 procedure, omitting however presoaking. The fissions L017300100014 were counted and recognized as such from the length L017300100015 of the track and from the density and aspect of the L017300100016 tracks. L017300100017 DETECTOR (PLATE) Ilford emulsions: Emulsion 200 micron thick L017300100018 of D1 type, contains 0.27 of a gram of bismuth per L017300100019 cm3 of emulsion, 1600 r of bremsstrahlung at the plate L017300100020 (measured with a Victorean trimble ionization L017300100021 chamber, behind a flat sheet of 1/8 inch Pb). L017300100022 PART-DET (FF) L017300100023 ERR-ANALYS (DATA-ERR) No details are given. L017300100024 COMMENT Compiler's comment, May 2012: Emulsion technique is L017300100025 very good for detecting fission events or photostars. L017300100026 Certain fission products like gamma-rays could escape L017300100027 detection, however, the fission fragments and their L017300100028 tracks are easily visible. L017300100029 HISTORY (20120523C) BP L017300100030 ENDBIB 28 0 L017300100031 NOCOMMON 0 0 L017300100032 ENDSUBENT 31 0 L017300199999 SUBENT L0173002 20120523 L020L017300200001 BIB 2 2 L017300200002 REACTION (83-BI-209(G,F),,SIG,,BRA) L017300200003 STATUS (CURVE) Fig.1, page 574. L017300200004 ENDBIB 2 0 L017300200005 NOCOMMON 0 0 L017300200006 DATA 5 6 L017300200007 EN-MAX EN-ERR DATA +DATA-ERR -DATA-ERR L017300200008 MEV MEV MB MB MB L017300200009 1.001E+02 1.003E+01 3.416E-02 1.840E-02 1.840E-02 L017300200010 1.499E+02 1.019E+01 1.998E-01 2.677E-02 2.677E-02 L017300200011 2.000E+02 9.856E+00 7.268E-01 6.359E-02 6.359E-02 L017300200012 2.507E+02 1.036E+01 1.516E+00 9.534E-02 9.534E-02 L017300200013 2.909E+02 9.859E+00 1.771E+00 1.338E-01 1.338E-01 L017300200014 3.200E+02 1.036E+01 2.763E+00 1.355E-01 1.756E-01 L017300200015 ENDDATA 8 0 L017300200016 ENDSUBENT 15 0 L017300299999 SUBENT L0173003 20120523 L020L017300300001 BIB 3 9 L017300300002 REACTION (83-BI-209(G,F),,SIG,,BRS) L017300300003 STATUS (CURVE) Fig.2, page 574. L017300300004 (DEP,L0173002) Data determined using the experimental L017300300005 values of subentry 2 and the theoretical bremsstrahlungL017300300006 spectrum. L017300300007 ANALYSIS (PHDIF) The data was analyzed using the theoretical L017300300008 bremsstrahlung spectrum and the cross section for L017300300009 fission as a function of the photon energy was L017300300010 determined. L017300300011 ENDBIB 9 0 L017300300012 NOCOMMON 0 0 L017300300013 DATA 5 5 L017300300014 EN EN-ERR DATA +DATA-ERR -DATA-ERR L017300300015 MEV MEV MB MB MB L017300300016 1.251E+02 1.035E+01 4.699E-01 1.082E-01 9.997E-02 L017300300017 1.749E+02 9.846E+00 1.835E+00 2.748E-01 2.833E-01 L017300300018 2.248E+02 1.001E+01 3.399E+00 6.996E-01 6.413E-01 L017300300019 2.697E+02 1.035E+01 1.725E+00 1.774E+00 9.829E-01 L017300300020 3.045E+02 1.002E+01 9.147E+00 3.032E+00 2.998E+00 L017300300021 ENDDATA 7 0 L017300300022 ENDSUBENT 21 0 L017300399999 ENDENTRY 3 0 L017399999999