ENTRY M0789 20100329 M053M078900000001 SUBENT M0789001 20100329 M053M078900100001 BIB 14 28 M078900100002 TITLE Photoexcitation mechanisms and photofission cross M078900100003 sections for Bi by 100 - 300 MeV quasi-monochromatic M078900100004 photons. M078900100005 AUTHOR (C.Guaraldo,V.Lucherini,E.De Sanctis, M078900100006 P.Levi Sandri,E.Polli,A.R.Reolon,S.Lo Nigro, M078900100007 S.Aiello,V.Bellini,V.Emma,C.Milone,G.S.Paparaldo) M078900100008 REFERENCE (J,PR/C,36,1027,1987) M078900100009 INSTITUTE (2ITYFRA,2ITYCAT) M078900100010 FACILITY (LINAC,2ITYFRA) LEALE (Laboratorio Esperienze M078900100011 Acceleratore Lineare Elettroni) facility. M078900100012 SAMPLE Metal targets of natural Bi with area surface of M078900100013 (50x50) mm**2 and thickness of 0.1 mm, sandwiched M078900100014 between two glass plates which covered all the sample M078900100015 surface. M078900100016 INC-SOURCE (BRST) Monochromatic positron annihilation photons M078900100017 produced by positron in-flight annihilation on liquid M078900100018 hydrogen target accompanied by its bremsstrahlung. M078900100019 METHOD (FISCT) Absolute fission counting. M078900100020 DETECTOR (GLASD) Glass detector, glass-sandwich technique. M078900100021 ANALYSIS (UNFLD) Unfolding procedure using method similar to M078900100022 the numerical one proposed by B.C.Cook. M078900100023 REL-REF (R,,B.C.COOK,J,NIM,24,256,1963) Unfolding method. M078900100024 COMMENT Photofission cross section of natural Bi was measured M078900100025 and nuclear fissility was calculated using recently M078900100026 measured total photoabsorption cross sections. M078900100027 STATUS (CURVE) Data from Figs. 2, 5, 6 were compiled at the M078900100028 Russia MSU SINP CDFE by V.Varlamov. M078900100029 HISTORY (20100329C) M078900100030 ENDBIB 28 0 M078900100031 NOCOMMON 0 0 M078900100032 ENDSUBENT 31 0 M078900199999 SUBENT M0789002 20100329 M053M078900200001 BIB 3 4 M078900200002 REACTION (83-BI-209(G,F),,SIG,,BRA) M078900200003 COMMENT Data obtained using the photon spectrum that is the M078900200004 sum of positron annihilation and bremsstrahlung. M078900200005 ERR-ANALYS (DATA-ERR) No information. M078900200006 ENDBIB 4 0 M078900200007 NOCOMMON 0 0 M078900200008 DATA 3 20 M078900200009 EN-MAX DATA DATA-ERR M078900200010 MEV MB MB M078900200011 123.94 .086 .029 M078900200012 132.58 .144 .03 M078900200013 151.3 .317 .032 M078900200014 163.83 .415 .043 M078900200015 173.72 .706 .058 M078900200016 193.09 .063 .058 M078900200017 198.4 .085 .056 M078900200018 202.39 1.007 .07 M078900200019 208.88 .692 .038 M078900200020 214.36 1.165 .066 M078900200021 223.67 1.439 .062 M078900200022 232.98 1.529 .086 M078900200023 238.03 1.554 .083 M078900200024 240.96 1.741 .058 M078900200025 247.71 1.654 .058 M078900200026 252.58 1.971 .072 M078900200027 259.57 2.058 .055 M078900200028 272.87 2.368 .052 M078900200029 290.72 2.863 .086 M078900200030 304.79 3.123 .086 M078900200031 ENDDATA 22 0 M078900200032 ENDSUBENT 31 0 M078900299999 SUBENT M0789003 20100329 M053M078900300001 BIB 4 9 M078900300002 REACTION (83-BI-209(G,F),,SIG,,BRS) M078900300003 CRITIQUE Data units in Fig. 5 are cm**2, not barns. M078900300004 ERR-ANALYS (DATA-ERR) Root-mean-square errors. M078900300005 (ERR-1) In order to take into account the M078900300006 uncertainties in the estimate of the normalization M078900300007 factors and of the contribution to the fission from M078900300008 photons at energies below 40 MeV a further error M078900300009 equal to 8 % should be added. M078900300010 STATUS (DEP,M0789002) M078900300011 ENDBIB 9 0 M078900300012 COMMON 1 3 M078900300013 ERR-1 M078900300014 PER-CENT M078900300015 8. M078900300016 ENDCOMMON 3 0 M078900300017 DATA 3 11 M078900300018 EN DATA DATA-ERR M078900300019 MEV MB MB M078900300020 100. .436 .095 M078900300021 120. .678 .084 M078900300022 140. 1.03 .084 M078900300023 160. 1.73 .2 M078900300024 180. 2.81 .26 M078900300025 200. 3.71 .39 M078900300026 220. 4.16 .46 M078900300027 240. 5.16 .56 M078900300028 260. 5.97 .55 M078900300029 280. 7.06 .51 M078900300030 300. 8.09 .92 M078900300031 ENDDATA 13 0 M078900300032 ENDSUBENT 31 0 M078900399999 SUBENT M0789004 20100329 M053M078900400001 BIB 4 7 M078900400002 REACTION ((83-BI-209(G,F),,SIG,,BRS)/ M078900400003 (83-BI-209(G,ABS),,SIG,,BRS)) M078900400004 REL-REF (R,,P.CARLOS+,J,NP/A,431,573,1984) M078900400005 209Bi photoabsorption cross section. M078900400006 ERR-ANALYS (ERR-T) Error bars take into account all the M078900400007 experimental errors. M078900400008 STATUS (DEP,M0789003) M078900400009 ENDBIB 7 0 M078900400010 NOCOMMON 0 0 M078900400011 DATA 3 11 M078900400012 EN DATA ERR-T M078900400013 MEV NO-DIM NO-DIM M078900400014 100. .05 .021 M078900400015 120. .058 .0188 M078900400016 140. .07 .02 M078900400017 160. .075 .025 M078900400018 180. .083 .024 M078900400019 200. .087 .033 M078900400020 220. .092 .032 M078900400021 240. .095 .036 M078900400022 260. .103 .034 M078900400023 280. .107 .034 M078900400024 300. .113 .035 M078900400025 ENDDATA 13 0 M078900400026 ENDSUBENT 25 0 M078900499999 ENDENTRY 4 0 M078999999999