ENTRY 30279 20190129 31883027900000001 SUBENT 30279001 20190129 31883027900100001 BIB 12 30 3027900100002 TITLE Investigation of polar LRA particle accompanied 3027900100003 fission of 236U 3027900100004 AUTHOR (I.Wilhelm, R.Bayer, J.Cvanda, Z.Dlouhy) 3027900100005 INSTITUTE (3CZRCHU,3CZRUJF) 3027900100006 REFERENCE (J,NP/A,262,301,1976) 3027900100007 EXP-YEAR (1974) 3027900100008 FACILITY (REAC,3CZRUJV) VVR-S reactor 3027900100009 INC-SPECT Thermal spectrum at the horizontal channel of the VVR-S3027900100010 reactor (neutron flux of about 10E+8 n/cm2/sec). 3027900100011 SAMPLE (92-U-235,ENR=0.9) Thin layer (0.2 mg/cm2) of UO2 3027900100012 deposited on an Al backing (18 mg/cm2). 3027900100013 DETECTOR (SIBAR) Two surface barrier semiconductor detectors: 3027900100014 - Fragment detector (200 mm2) oriented toward the 3027900100015 sensitive layer of the sample and placed at 3027900100016 115 mm of it. 3027900100017 - Alpha detector (300 mm2, depleted layer of 700 um) 3027900100018 situated on the opposite side of the sample at 3027900100019 55 mm of it and was shielded against fission frag- 3027900100020 ments by an Al foil of 54 mg/cm2. 3027900100021 Energy calibration was checked before and after each 3027900100022 run with standard alpha emitters. 3027900100023 ADD-RES Polar LRA emission cross section = 51.0+/-3.5 mb. 3027900100024 STATUS (TABLE) Data from Wilhelm 3027900100025 (APRVD) Approved by Wilhelm (1975-01-24) 3027900100026 HISTORY (19741107C) CA 3027900100027 (19750403U) CA Status APRVD added. 3027900100028 (20080423A) BIB section update 3027900100029 (20100303A) SD: REACTION codes in 002, 003, 005 changed3027900100030 (20190129D) On. 004-005 deleted. 3027900100031 (20190129A) On. Major revsions in 002-003. 3027900100032 ENDBIB 30 0 3027900100033 COMMON 1 3 3027900100034 EN-DUMMY 3027900100035 EV 3027900100036 0.0253 3027900100037 ENDCOMMON 3 0 3027900100038 ENDSUBENT 37 0 3027900199999 SUBENT 30279002 20190129 31883027900200001 BIB 4 7 3027900200002 REACTION (92-U-235(N,F)2-HE-4,TER,FY/DA/DE,A+FF/A,MXW/REL) 3027900200003 CORRECTION Energy was corrected for energy loss in the Al shield. 3027900200004 ADD-RES Fitting of the alpha energy spectrum by Gaussian gives:3027900200005 - most probable energy = 15.7 +/- 0.3 MeV 3027900200006 - standard deviation = 3.7 +/- 0.3 MeV 3027900200007 HISTORY (20100303A) SD: REACTION code changed 3027900200008 (20190129A) On. ANG -> ANG-RL 3027900200009 ENDBIB 7 0 3027900200010 COMMON 1 3 3027900200011 ANG-RL 3027900200012 ADEG 3027900200013 90. 3027900200014 ENDCOMMON 3 0 3027900200015 DATA 2 40 3027900200016 E DATA 3027900200017 MEV ARB-UNITS 3027900200018 8.98 4. 3027900200019 9.36 5. 3027900200020 9.74 4. 3027900200021 10.13 16. 3027900200022 10.52 15. 3027900200023 10.91 20. 3027900200024 11.31 16. 3027900200025 11.71 22. 3027900200026 12.11 15. 3027900200027 12.51 17. 3027900200028 12.92 15. 3027900200029 13.33 17. 3027900200030 13.74 23. 3027900200031 14.15 30. 3027900200032 14.56 25. 3027900200033 14.98 29. 3027900200034 15.40 29. 3027900200035 15.81 28. 3027900200036 16.23 26. 3027900200037 16.66 27. 3027900200038 17.08 24. 3027900200039 17.50 26. 3027900200040 17.93 28. 3027900200041 18.35 14. 3027900200042 18.78 22. 3027900200043 19.21 13. 3027900200044 19.64 14. 3027900200045 20.07 15. 3027900200046 20.50 15. 3027900200047 20.94 12. 3027900200048 21.37 10. 3027900200049 21.80 13. 3027900200050 22.24 3. 3027900200051 23.11 3. 3027900200052 23.55 3. 3027900200053 23.99 2. 3027900200054 24.42 1. 3027900200055 24.86 3. 3027900200056 25.30 0. 3027900200057 25.75 0. 3027900200058 ENDDATA 42 0 3027900200059 ENDSUBENT 58 0 3027900299999 SUBENT 30279003 20190129 31883027900300001 BIB 4 16 3027900300002 REACTION (92-U-235(N,F)2-HE-4,TER,FY/DA/DE,A+FF/A,MXW/REL) 3027900300003 ADD-RES Fitting of the alpha energy spectrum by sigle Gaussian 3027900300004 gives: 3027900300005 - most probable energy = 23.4 +/- 0.3 MeV 3027900300006 - standard deviation = 1.95 +/- 0.3 MeV 3027900300007 with chi-sq=0.06. 3027900300008 Fitting of the alpha energy spectrum by tow Gaussians 3027900300009 gives: 3027900300010 - most probable energy = 22.9 +/- 0.2 MeV 3027900300011 - standard deviation = 1.55 +/- 0.2 MeV 3027900300012 and 3027900300013 - most probable energy = 26.7 +/- 0.5 MeV 3027900300014 - standard deviation = 2.1 +/- 0.5 MeV. 3027900300015 CORRECTION Energy was corrected for energy loss in the Al shield. 3027900300016 HISTORY (20100303A) SD: REACTION code changed 3027900300017 (20190129A) On. ANG -> ANG-RL 3027900300018 ENDBIB 16 0 3027900300019 COMMON 1 3 3027900300020 ANG-RL 3027900300021 ADEG 3027900300022 0. 3027900300023 ENDCOMMON 3 0 3027900300024 DATA 2 30 3027900300025 E DATA 3027900300026 MEV ARB-UNITS 3027900300027 12.71 6. 3027900300028 13.31 2. 3027900300029 13.91 4. 3027900300030 14.52 5. 3027900300031 15.13 2. 3027900300032 15.75 4. 3027900300033 16.37 6. 3027900300034 16.99 3. 3027900300035 17.62 4. 3027900300036 18.25 5. 3027900300037 18.89 6. 3027900300038 19.53 4. 3027900300039 20.17 10. 3027900300040 20.81 12. 3027900300041 21.46 20. 3027900300042 22.10 27. 3027900300043 22.75 21. 3027900300044 23.41 22. 3027900300045 24.06 23. 3027900300046 24.72 18. 3027900300047 25.38 7. 3027900300048 26.04 11. 3027900300049 26.70 9. 3027900300050 27.36 6. 3027900300051 28.03 2. 3027900300052 28.70 4. 3027900300053 29.37 1. 3027900300054 30.04 2. 3027900300055 30.71 1. 3027900300056 31.38 0. 3027900300057 ENDDATA 32 0 3027900300058 ENDSUBENT 57 0 3027900399999 NOSUBENT 30279004 20190129 31883027900400001 NOSUBENT 30279005 20190129 31883027900500001 ENDENTRY 5 0 3027999999999