ENTRY A0687 20140302 A081A068700000001 SUBENT A0687001 20140302 A081A068700100001 BIB 12 48 A068700100002 TITLE Fission fragment angular distributions for the systemsA068700100003 14N+232Th and 11B+235U at near and sub-barrier energiesA068700100004 REFERENCE (J,PR/C,69,064603,2004) A068700100005 (J,PR/C,64,041602,2001) Preliminary communication. A068700100006 (J,NP/A,734,249,2004) Anisotropy given in figs A068700100007 AUTHOR (Bivash R.Behera, M.Satpathy, S.Jena, S.Kailas, A068700100008 R.G.Thomas, K.Mahata, A.Chatterjee, Subinit Roy, A068700100009 P.Basu, M.K.Sharan, S.K.Datta) A068700100010 INSTITUTE (3INDIND) Department of Physics, Utkal University. A068700100011 (3INDTRM) Nuclear Physics Division. A068700100012 (3INDSAH) A068700100013 (3INDNSD) A068700100014 SAMPLE The 232-Th target was either a 1.8 mg/cm2 rolled A068700100015 thorium foil or a 250 mug/cm2 thin layer of thorium, A068700100016 deposited on a 600 mug/cm2 aluminum foil. A068700100017 The 235-U target was of thickness 300-400 mug/cm2, A068700100018 electrodeposited on a 600 mug/cm2 aluminum foil. A068700100019 DETECTOR (TELES,SIBAR,SIBAR) E-delta-E silicon surface barrier A068700100020 telescopes. Delta-E detector are fully depleted siliconA068700100021 detectors having an active area of 70-100 mm**2 and of A068700100022 thickness 10-12 microns. The E-detectors are either A068700100023 fully depleted or partially depleted silicon detectors A068700100024 having an active area of 150 mm2 and a thickness of 300A068700100025 microns. A068700100026 (SIBAR) Two the detectors were used to monitor beam A068700100027 intensity. A068700100028 FACILITY (VDGT,3INDNSD) 15UD Pelletron accelerator was used for A068700100029 the measurements of the 14N+232Th system. A068700100030 (VDGT,3INDTRM) 14UD Pelletron was used to measure A068700100031 fission of 11B+235U. A068700100032 METHOD (EXTB) 12-C beam. All beam energy values are correctedA068700100033 for energy loss in the target. A068700100034 Clearly separated from the rest of the reaction A068700100035 products. A068700100036 ERR-ANALYS (DATA-ERR) Any analysis is not given. A068700100037 ADD-RES (COMP).The measured fission fragment anisotropies for A068700100038 the systems are compared with the different model A068700100039 calculations: A068700100040 1.The ECD-K state model with spin=0; A068700100041 2.The same calculation involving target spin; A068700100042 3.The calculation involving both target and projectileA068700100043 spins; A068700100044 4. SSPM calculation. A068700100045 STATUS (TABLE) Tbl.1 from PR/C,69,064603,2004 A068700100046 HISTORY (20040721C) A068700100047 (20090827A).Correction in author' list has been done, A068700100048 according V.Zerkin remarks. A068700100049 (20140302U) SD: Ref. NP/A,734 on was added. A068700100050 ENDBIB 48 0 A068700100051 NOCOMMON 0 0 A068700100052 ENDSUBENT 51 0 A068700199999 SUBENT A0687002 20041019 0000A068700200001 BIB 4 8 A068700200002 REACTION (90-TH-232(7-N-14,F),,DA,FF,RSD) A068700200003 FLAG (1.) Measuremnets were made with 1.8 mg/cm2 thorium A068700200004 target. A068700200005 COMMENT -By authors. The measured differential fission cross A068700200006 sections were transformed to the center of mass system A068700200007 assuming symmetric mass division and using Viola A068700200008 systematics for the total fragment kinetic energy. A068700200009 REL-REF (R,,E.VIOLA+,J,PR/C,31,1550,1985) A068700200010 ENDBIB 8 0 A068700200011 COMMON 1 3 A068700200012 ANG A068700200013 ADEG A068700200014 0. A068700200015 ENDCOMMON 3 0 A068700200016 DATA 4 9 A068700200017 EN DATA-CM DATA-ERR FLAG A068700200018 MEV NO-DIM NO-DIM NO-DIM A068700200019 91.6 2.06 0.08 1. A068700200020 87.5 1.98 0.06 A068700200021 84.7 1.9 0.06 A068700200022 82.7 1.79 0.08 A068700200023 80.7 1.78 0.04 A068700200024 78.7 1.6 0.09 A068700200025 76.6 1.68 0.08 A068700200026 74.6 1.59 0.08 A068700200027 72.6 1.51 0.07 1. A068700200028 ENDDATA 11 0 A068700200029 ENDSUBENT 28 0 A068700299999 SUBENT A0687003 20041019 0000A068700300001 BIB 3 6 A068700300002 REACTION (92-U-235(5-B-11,F),,DA,FF,RSD) A068700300003 COMMENT -By authors. The measured differential fission cross A068700300004 sections were transformed to the center of mass system A068700300005 assuming symmetric mass division and using Viola A068700300006 systematics for the total fragment kinetic energy. A068700300007 REL-REF (R,,E.VIOLA+,J,PR/C,31,1550,1985) A068700300008 ENDBIB 6 0 A068700300009 COMMON 1 3 A068700300010 ANG A068700300011 ADEG A068700300012 0. A068700300013 ENDCOMMON 3 0 A068700300014 DATA 3 7 A068700300015 EN DATA-CM DATA-ERR A068700300016 MEV NO-DIM NO-DIM A068700300017 71.9 1.62 0.06 A068700300018 67.9 1.58 0.06 A068700300019 63.9 1.53 0.08 A068700300020 59.9 1.37 0.08 A068700300021 55.9 1.21 0.07 A068700300022 53.9 1.18 0.06 A068700300023 51.3 1.15 0.06 A068700300024 ENDDATA 9 0 A068700300025 ENDSUBENT 24 0 A068700399999 SUBENT A0687004 20041019 0000A068700400001 BIB 4 8 A068700400002 REACTION (90-TH-232(7-N-14,F),,SIG) A068700400003 STATUS (DEP,O0687002) A068700400004 ANALYSIS (INTAD) The experimental differential cross sections A068700400005 were fitted with the exact expression from the A068700400006 saddlepoint model. Fitted angular distributions were A068700400007 integrated to get the total cross sections. A068700400008 FLAG (1.) Measuremnets were made with 1.8 mg/cm2 thorium A068700400009 target. A068700400010 ENDBIB 8 0 A068700400011 NOCOMMON 0 0 A068700400012 DATA 4 9 A068700400013 EN DATA DATA-ERR FLAG A068700400014 MEV MB MB NO-DIM A068700400015 91.6 823. 40. 1. A068700400016 87.5 650. 26. A068700400017 84.7 518. 24. A068700400018 82.7 380. 53. A068700400019 80.7 290. 27. A068700400020 78.7 214. 11. A068700400021 76.6 111. 7. A068700400022 74.6 54. 4. A068700400023 72.6 20.3 2. 1. A068700400024 ENDDATA 11 0 A068700400025 ENDSUBENT 24 0 A068700499999 SUBENT A0687005 20041019 0000A068700500001 BIB 5 21 A068700500002 REACTION (92-U-235(5-B-11,F),,SIG) A068700500003 STATUS (DEP,A0687003) A068700500004 ANALYSIS (INTAD) The angular distributions were measured at sixA068700500005 energies spanning the entire energy region from 52 to A068700500006 72 MeV. Saddle-point model expression of angular A068700500007 distribution was used to fit the angular distribution A068700500008 data. A068700500009 REL-REF (R,,J.D.BIERMAN+,J,PR/C,54,3068,1996) A068700500010 COMMENT -By authors. Cross sections at other energies were A068700500011 determined by measuring the fission cross section at A068700500012 one particular angle and employing the procedure, as A068700500013 discussed in REL-REF. A068700500014 It has been shown that there is little change in the A068700500015 shape of the angular distribution curve over the A068700500016 barrier region. Therefore the ratio of the total crossA068700500017 section to the differential cross section remains A068700500018 constant or varies slowly over this entire energy A068700500019 domain. On the basis of these results, it is clear A068700500020 that, if the differential cross section is measured A068700500021 only at this crossover angle, it is possible to A068700500022 determine total cross section. A068700500023 ENDBIB 21 0 A068700500024 NOCOMMON 0 0 A068700500025 DATA 3 12 A068700500026 EN DATA DATA-ERR A068700500027 MEV MB MB A068700500028 73.9 1440. 138. A068700500029 71.9 1390. 128. A068700500030 69.9 1200. 112. A068700500031 67.9 1030. 72. A068700500032 65.9 960. 95. A068700500033 63.9 772. 54. A068700500034 61.9 630. 40. A068700500035 59.9 465. 33. A068700500036 57.9 270. 20. A068700500037 55.9 132. 14. A068700500038 53.9 54.6 5.3 A068700500039 51.3 7. 2. A068700500040 ENDDATA 14 0 A068700500041 ENDSUBENT 40 0 A068700599999 ENDENTRY 5 0 A068799999999