ENTRY 22322 20090401 22112232200000001 SUBENT 22322001 20090401 22112232200100001 BIB 12 42 2232200100002 REFERENCE (C,94GATLIN,1,124,199405) Main ref. 2232200100003 TITLE -Peculiarities found by using different counting gases 2232200100004 for Cf-252 spontaneuous fission. 2232200100005 AUTHOR (F.J.Hambsch,J.Van Arle,R.Vogt) 2232200100006 INSTITUTE (2ZZZGEL) 2232200100007 METHOD (EDE,PHD) 2232200100008 DETECTOR (IOCH) A twin frisch gridded ionization chamber was 2232200100009 used. The distance cathode - grid was 46 mm and the 2232200100010 distance grid - anode was 12 mm. These dimensions were2232200100011 adapted in view of a working pressure of 0.6E+05 Pa. 2232200100012 Both CH4 gas and a mixture of 90% argon and 2232200100013 10% CH4 were used as counter gases, with N55 2232200100014 quality at pressures of 0.6E+05 Pa and 1.2E+05 Pa. At 2232200100015 the lower pressure no absolute calibration using alpha2232200100016 particles from Cf-252 could be performed. The voltages2232200100017 applied to the chamber plates were -2.5 kV on the 2232200100018 cathode and +2.1 kv on the anode for both counter 2232200100019 gases at 0.6E+05 Pa. For the 1.2E+05 Pa pressure the 2232200100020 voltages were -2.5 kV on the cathode and +2.1 kV on 2232200100021 the anode for the gas mixture, and -2.5 kV on the 2232200100022 cathode and +2.1 kV on the anode and -4.7 kV on the 2232200100023 cathode and +4.0 kV on the anode for CH4. 2232200100024 PART-DET (FF) 2232200100025 SAMPLE .The Cf-252 sample was mounted on a 0.12 mg/cm2 nickel 2232200100026 backing in the center of the common cathode. 2232200100027 CORRECTION .The data were corrected for electronic instabilities 2232200100028 and different calibration factors between the four 2232200100029 electronic chains. The frisch grid inefficiency was 2232200100030 also taken into account. The angle-dependent energy 2232200100031 loss in the sample and backing was experimentally 2232200100032 determined and incorporated in the analysis. Mass 2232200100033 dependent corrections for the pulse height defect, 2232200100034 PHD, were applied. 2232200100035 ERR-ANALYS (DATA-ERR) No comment 2232200100036 COMMENT .This is an investigation of how the determined 2232200100037 quantities depend on the choice of counting gas. It 2232200100038 was found that the mixture 90% argon and 2232200100039 10% CH4 gave the most reliable results. 2232200100040 HISTORY (19961229C) N.O. 2232200100041 (19970214E) 2232200100042 (20090401A) Date is corrected. BIB information added. 2232200100043 Upper case to low case converted 2232200100044 ENDBIB 42 0 2232200100045 NOCOMMON 0 0 2232200100046 ENDSUBENT 45 0 2232200199999 SUBENT 22322002 20090401 22112232200200001 BIB 4 7 2232200200002 REACTION (98-CF-252(0,F),,AP,LF) 2232200200003 MISC-COL (MISC1) The dispersion, sigma, of the distribution. 2232200200004 FLAG (1.) C-H4 gas, without PHD correction. 2232200200005 (2.) C-H4 gas, with PHDcorrection. 2232200200006 (3.) Ar + C-H4 gas, without PHD correction. 2232200200007 (4.) Ar + C-H4 gas, with PHD correction. 2232200200008 STATUS (TABLE) Data taken from table 1 of main ref. 2232200200009 ENDBIB 7 0 2232200200010 NOCOMMON 0 0 2232200200011 DATA 4 4 2232200200012 DATA DATA-ERR MISC1 FLAG 2232200200013 NO-DIM NO-DIM NO-DIM NO-DIM 2232200200014 1.071E+02 1.E-01 7.4 1. 2232200200015 1.072E+02 1.E-01 7.5 3. 2232200200016 1.086E+02 1.E-01 6.9 2. 2232200200017 1.086E+02 1.E-01 6.9 4. 2232200200018 ENDDATA 6 0 2232200200019 ENDSUBENT 18 0 2232200299999 SUBENT 22322003 20090401 22112232200300001 BIB 4 7 2232200300002 REACTION (98-CF-252(0,F),,AP,HF) 2232200300003 MISC-COL (MISC1) The dispersion, sigma, of the distribution. 2232200300004 FLAG (1.) C-H4 gas, without PHD correction. 2232200300005 (2.) C-H4 gas, with PHD correction. 2232200300006 (3.) Ar + C-H4 gas, without PHD correction. 2232200300007 (4.) Ar + C-H4 gas, with PHD correction. 2232200300008 STATUS (TABLE) Data taken from table 1 of main ref. 2232200300009 ENDBIB 7 0 2232200300010 NOCOMMON 0 0 2232200300011 DATA 4 4 2232200300012 DATA DATA-ERR MISC1 FLAG 2232200300013 NO-DIM NO-DIM NO-DIM NO-DIM 2232200300014 1.433E+02 1.E-01 7. 2. 2232200300015 1.437E+02 1.E-01 7. 4. 2232200300016 1.448E+02 1.E-01 7.6 1. 2232200300017 1.449E+02 1.E-01 7.7 3. 2232200300018 ENDDATA 6 0 2232200300019 ENDSUBENT 18 0 2232200399999 SUBENT 22322004 20090401 22112232200400001 BIB 4 7 2232200400002 REACTION (98-CF-252(0,F),,AKE,FF) 2232200400003 MISC-COL (MISC1) The dispersion, sigma, of the distribution. 2232200400004 FLAG (1.) C-H4 gas, without PHD correction. 2232200400005 (2.) C-H4 gas, with PHD correction. 2232200400006 (3.) Ar + C-H4 gas, without PHD correction. 2232200400007 (4.) Ar + C-H4 gas, with PHD correction. 2232200400008 STATUS (TABLE) Data taken from table 1 of main ref. 2232200400009 ENDBIB 7 0 2232200400010 NOCOMMON 0 0 2232200400011 DATA 4 4 2232200400012 DATA DATA-ERR MISC1 FLAG 2232200400013 MEV MEV MEV NO-DIM 2232200400014 1.692E+02 1. 1.13E+01 1. 2232200400015 1.763E+02 1.5 1.18E+01 3. 2232200400016 1.791E+02 1.1 1.17E+01 2. 2232200400017 1.858E+02 1.5 1.22E+01 4. 2232200400018 ENDDATA 6 0 2232200400019 ENDSUBENT 18 0 2232200499999 ENDENTRY 4 0 2232299999999