ENTRY A0193 20220330 A100A019300000001
SUBENT A0193001 20220330 A100A019300100001
BIB 11 62 A019300100002
TITLE A pellet method for the measurement of excitation A019300100003
functions: cross-sections for 140-Ce(p,2n)139-Pr and A019300100004
140-Ce(p,3n)138-m-Pr A019300100005
AUTHOR (S.K.Zeisler, D.W.Becker) A019300100006
INSTITUTE (2GERDKZ) German Cancer Research Center A019300100007
REFERENCE (J,NIM/B,160,216,2000) A019300100008
FACILITY (CYCLO,2GERDKZ) A019300100009
METHOD (STTA,BCINT,GSPEC) A019300100010
DETECTOR (HPGE) A019300100011
SAMPLE A cylindrical pellet was formed from commercially A019300100012
available natural cerium dioxide powder CeO2 99.9% A019300100013
The tablet was weighed on an analytical scale and its A019300100014
thickness measured with a precision of 0.001 mm to A019300100015
determine the material density for stopping power A019300100016
calculations as well as the amount of target atoms. A019300100017
The dimensions of a typical pellet were: diameter 13 mmA019300100018
height 6.4 mm, weight 3.9 g. The pellet was glued A019300100019
onto an aluminum block and the surface precut on the A019300100020
rotation microtome for precise adjustment after A019300100021
irradiation. The holder was finally placed into a A019300100022
helium-cooled aluminum target body. A019300100023
One hour after the end of bombardment, the aluminum A019300100024
block with the pellet was removed from the target A019300100025
holder and mounted into the microtome. A019300100026
The pellet was cut into thin slices of 4 mum each. A019300100027
10 slices of 4 mum each were combined, equaling a A019300100028
sample of 40 mum thickness. A019300100029
COMMENT - By author - abstract: A019300100030
the cross-section measurement of particle-induced A019300100031
nuclear reactions is commonly performed using the A019300100032
stacked foil method. If the target material is fragile A019300100033
or sensitive to air or moisture, this technique is A019300100034
hardly practical. This communication describes a new A019300100035
method for the simple, reliable and precise A019300100036
determination of cross-sections. A pressed pellet of aA019300100037
stable compound of the desired element is irradiated A019300100038
and then cut into thin slices with a microtome. The A019300100039
radionuclides in each slice are measured and the A019300100040
cross-sections for the nuclear reactions involved are A019300100041
derived by standard equations. The feasibility of the A019300100042
pellet method was demonstrated by measuring the A019300100043
excitation functions of the 140Ce(p,2n)139 Pr and A019300100044
140Ce(p,3n)138-m-Pr reactions. The calculated results A019300100045
were in good agreement with the experimental yield A019300100046
obtained from thick target irradiations. A019300100047
ERR-ANALYS (ERR-T) The total errors in the measured cross-sectionsA019300100048
were estimated by taking square roots of the sums of A019300100049
the squares of the individual errors A019300100050
(ERR-1) Uncertainty in particle flux; A019300100051
(ERR-2) Uncertainty in number of target nuclei; A019300100052
(ERR-3,2.,29.) Uncertainty in radioactivity A019300100053
measurement. A019300100054
(EN-ERR) The errors due to the uncertainty of the A019300100055
cerium stopping power were estimated. For the lowest A019300100056
energy of 12.57 MeV, the mean error amounts to A019300100057
0.45 MeV (3.6%). A019300100058
HISTORY (20000508C) A019300100059
(20080611A) BIB section updated A019300100060
Corrections were made according new EXFOR rules and A019300100061
N.Otsuka and A.Nichols remarks. A019300100062
(20220330A) SD: Corrections in all Subents. ERR-ANALYS A019300100063
updated. A019300100064
ENDBIB 62 0 A019300100065
COMMON 2 3 A019300100066
ERR-1 ERR-2 A019300100067
PER-CENT PER-CENT A019300100068
6.5 6. A019300100069
ENDCOMMON 3 0 A019300100070
ENDSUBENT 69 0 A019300199999
SUBENT A0193002 20220330 A100A019300200001
BIB 4 7 A019300200002
REACTION (58-CE-140(P,3N)59-PR-138-M,,SIG) A019300200003
DECAY-DATA (59-PR-138-M,2.02HR,DG,1037.8,1.01, A019300200004
DG,788.7,1., A019300200005
DG,302.7,0.80) A019300200006
STATUS (TABLE) Tbl.1 from Nucl.Instr.Meth.,B160(2000)216 A019300200007
HISTORY (20220330A) SD: SF9=EXP deleted from REACTION code. A019300200008
STATUS added. A019300200009
ENDBIB 7 0 A019300200010
NOCOMMON 0 0 A019300200011
DATA 4 41 A019300200012
EN EN-ERR DATA ERR-T A019300200013
MEV MEV MB MB A019300200014
32.22 0.02 330. 29. A019300200015
32.03 0.02 335. 30. A019300200016
31.83 0.03 310. 28. A019300200017
31.63 0.03 319. 29. A019300200018
31.43 0.04 300. 27. A019300200019
31.23 0.04 319. 29. A019300200020
31.03 0.06 272. 24. A019300200021
30.83 0.06 323. 29. A019300200022
30.63 0.07 304. 28. A019300200023
30.43 0.07 245. 23. A019300200024
30.22 0.08 212. 19. A019300200025
30.02 0.08 280. 26. A019300200026
29.81 0.09 254. 23. A019300200027
29.60 0.09 255. 23. A019300200028
29.39 0.10 229. 21. A019300200029
29.18 0.10 173. 16. A019300200030
28.97 0.12 229. 21. A019300200031
28.76 0.12 189. 17. A019300200032
28.54 0.13 200. 18. A019300200033
28.33 0.13 146. 13. A019300200034
28.11 0.14 179. 17. A019300200035
27.90 0.14 164. 15. A019300200036
27.68 0.15 163. 15. A019300200037
27.46 0.15 154. 14. A019300200038
27.24 0.16 143. 14. A019300200039
27.01 0.16 124. 11. A019300200040
26.79 0.17 109. 11. A019300200041
26.56 0.17 97. 9. A019300200042
26.34 0.18 82. 8. A019300200043
26.11 0.18 66. 7. A019300200044
25.88 0.20 62. 6. A019300200045
25.65 0.20 51. 6. A019300200046
25.41 0.21 38. 4. A019300200047
25.18 0.21 27. 4. A019300200048
24.94 0.22 21. 3. A019300200049
24.70 0.22 16. 3. A019300200050
24.46 0.23 11. 1. A019300200051
24.22 0.23 13. 2. A019300200052
23.98 0.24 7. 1. A019300200053
23.48 0.25 5. 1. A019300200054
22.98 0.26 3. 1. A019300200055
ENDDATA 43 0 A019300200056
ENDSUBENT 55 0 A019300299999
SUBENT A0193003 20220330 A100A019300300001
BIB 6 15 A019300300002
REACTION (58-CE-140(P,2N)59-PR-139,,SIG) A019300300003
RAD-DET (58-CE-139-G,DG) It is daughter of Pr-139. A019300300004
DECAY-DATA (58-CE-139-G,137.5D,DG,165.9,0.80) A019300300005
COMMENT - By Author - A019300300006
1. In the first series of spectra, when yield of A019300300007
Pr-138m was measured, no Ce-139 could be found which A019300300008
indicates that the 140-Ce(p,n+p)139-Ce reaction must A019300300009
have a very low cross section at proton energy below A019300300010
32 MeV. For the process no cross section data have beenA019300300011
published yet. A019300300012
2. Ce-139 gamma spectra was recorded after three days A019300300013
to measure quantitatively the long-lived radioisotopes.A019300300014
STATUS (TABLE) Tbl.2 from Nucl.Instr.Meth.,B160(2000)216 A019300300015
HISTORY (20220330A) SD: SF9=EXP deleted from REACTION code. A019300300016
STATUS added. A019300300017
ENDBIB 15 0 A019300300018
NOCOMMON 0 0 A019300300019
DATA 4 76 A019300300020
EN EN-ERR DATA ERR-T A019300300021
MEV MEV MB MB A019300300022
32.22 0.02 419. 79. A019300300023
32.03 0.02 375. 74. A019300300024
31.83 0.03 418. 81. A019300300025
31.63 0.03 417. 76. A019300300026
31.43 0.04 422. 86. A019300300027
31.23 0.04 482. 80. A019300300028
31.03 0.06 420. 70. A019300300029
30.83 0.06 556. 90. A019300300030
30.63 0.07 490. 100. A019300300031
30.43 0.07 425. 85. A019300300032
30.22 0.08 359. 115. A019300300033
30.02 0.08 554. 89. A019300300034
29.81 0.09 502. 87. A019300300035
29.60 0.09 581. 89. A019300300036
29.39 0.10 503. 82. A019300300037
29.18 0.10 430. 81. A019300300038
28.97 0.12 582. 85. A019300300039
28.76 0.12 556. 81. A019300300040
28.54 0.13 627. 90. A019300300041
28.33 0.13 501. 83. A019300300042
28.11 0.14 642. 92. A019300300043
27.90 0.14 741. 126. A019300300044
27.68 0.15 759. 108. A019300300045
27.46 0.15 783. 106. A019300300046
27.24 0.16 829. 113. A019300300047
27.01 0.16 848. 111. A019300300048
26.79 0.17 899. 115. A019300300049
26.56 0.17 945. 114. A019300300050
26.34 0.18 908. 107. A019300300051
26.11 0.18 1046. 0129. A019300300052
25.88 0.20 1066. 0129. A019300300053
25.65 0.20 952. 117. A019300300054
25.41 0.21 1090. 0126. A019300300055
25.18 0.21 1117. 0126. A019300300056
24.94 0.22 1074. 0127. A019300300057
24.70 0.22 1245. 0149. A019300300058
24.46 0.23 1197. 0140. A019300300059
24.22 0.23 1233. 0134. A019300300060
23.98 0.24 1202. 0136. A019300300061
23.73 0.24 1098. 0127. A019300300062
23.48 0.25 1305. 0148. A019300300063
23.23 0.25 1147. 0142. A019300300064
22.98 0.26 1326. 0150. A019300300065
22.73 0.26 1159. 0142. A019300300066
22.47 0.27 1209. 0140. A019300300067
22.21 0.28 1180. 0151. A019300300068
21.95 0.29 1015. 0122. A019300300069
21.69 0.29 1083. 0125. A019300300070
21.43 0.30 1155. 0134. A019300300071
21.16 0.30 1138. 0136. A019300300072
20.89 0.31 1206. 0137. A019300300073
20.62 0.31 1268. 0155. A019300300074
20.34 0.32 1127. 0133. A019300300075
20.06 0.32 1042. 0122. A019300300076
19.78 0.33 1068. 0135. A019300300077
19.50 0.33 998. 147. A019300300078
19.21 0.34 1016. 0118. A019300300079
18.92 0.34 968. 129. A019300300080
18.62 0.35 978. 126. A019300300081
18.33 0.36 988. 117. A019300300082
18.03 0.37 955. 127. A019300300083
17.72 0.37 832. 107. A019300300084
17.41 0.38 806. 96. A019300300085
17.10 0.38 805. 106. A019300300086
16.78 0.39 756. 95. A019300300087
16.46 0.39 787. 137. A019300300088
16.14 0.40 606. 87. A019300300089
15.81 0.40 560. 96. A019300300090
15.47 0.41 430. 73. A019300300091
15.13 0.41 384. 73. A019300300092
14.78 0.42 260. 63. A019300300093
14.43 0.42 232. 40. A019300300094
14.07 0.44 148. 36. A019300300095
13.71 0.44 67. 22. A019300300096
12.95 0.45 102. 31. A019300300097
12.57 0.45 40. 11. A019300300098
ENDDATA 78 0 A019300300099
ENDSUBENT 98 0 A019300399999
ENDENTRY 3 0 A019399999999