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