摘要We investigate fission induced by negative pions in copper and bismuth targets using CR-39 dielectric track detectors. The target-detector assemblies in 4π-geometric configuration were exposed at the AGS facility of Brookhaven National Laboratory, USA. The exposed detectors were chemically etched under appropriate etching conditions and scanned to collect data in the form of fission fragments tracks produced as a result of interaction of pions with the target nuclei. Using the track counts, the experimental fission cross sections for copper and bismuth have been measured at energies of 500, 672, 1068 and 1665 MeV and compared with the calculation using the Cascade-Exciton Model code (CEM95). The values of fission probability based on experimental fission cross-sections have been compared with the theoretically calculated values of fission probabilities obtained using the CEM95 code. Good agreement is observed between the measured and computed results.
Abstract：We investigate fission induced by negative pions in copper and bismuth targets using CR-39 dielectric track detectors. The target-detector assemblies in 4π-geometric configuration were exposed at the AGS facility of Brookhaven National Laboratory, USA. The exposed detectors were chemically etched under appropriate etching conditions and scanned to collect data in the form of fission fragments tracks produced as a result of interaction of pions with the target nuclei. Using the track counts, the experimental fission cross sections for copper and bismuth have been measured at energies of 500, 672, 1068 and 1665 MeV and compared with the calculation using the Cascade-Exciton Model code (CEM95). The values of fission probability based on experimental fission cross-sections have been compared with the theoretically calculated values of fission probabilities obtained using the CEM95 code. Good agreement is observed between the measured and computed results.
G. Sher**;Mukhtar A. Rana;S. Manzoor;M. I. Shahzad
. Negative Pion Induced Fission with Heavy Target Nuclei[J]. 中国物理快报, 2011, 28(1): 12501-012501.
G. Sher**, Mukhtar A. Rana, S. Manzoor, M. I. Shahzad
. Negative Pion Induced Fission with Heavy Target Nuclei. Chin. Phys. Lett., 2011, 28(1): 12501-012501.
[1] Ahrens J 1985 Nucl. Phys. A 446 229c
[2] Cugnon T and Lemaire M C 1988 Nucl. Phys. A 489 781
[3] Hicks K H et al 1985 Phys. Rev. C 31 1323
[4] Moretto L G et al 1993 Phys. Rev. Lett. 71 3935
[5] Chen C M et al 1993 Phys. Rev. C 48 841
[6] Mashnik S G 1995 User's Manual for the CEM95 Code , OECD Nuclear Energy Agency Data Bank, Le Saint-Germain 12, Boulevard, des Iles, F-92130, Issy-les-Moulineax, Paris, France, http://www.nea.fr/abs/html/iaea1247.html
[7] Khan H A, Qureshi I E, Shahzad M I, Manzoor S, Farooq M A, Sher G, Khan E U, Peterson and R J 1999 Radiat. Meas. 31 559
[8] Iljinov A S, Mebel M V, Bianchi N, Sanctis E De, Guardalo C, Lucherini V, Muccifora V, Polli E, Reolon A R and Rossi P 1992 Nucl. Phys. A 543 517
[9] Prokofiev A V, Mashnik S G and Sierk A 1999 J. Nucl. Sci. Engin. 13 178 Report number: LA-UR-98-0418: arXiv:nucl-th/9802027v1
[10] Barashenkov V S, Gereghi F G, Iljinov A S and Toneev V D 1974 Nucl. Phys. A 222 204
[11] Dostrovsky I, Fraenkel Z and Friedlander G 1959 Phys. Rev. 116 683
[12] Mashnik S G 1993 Acta Phys. Slovaca 43 243
[13] Krappe H J, Nix J R and Sierk A J 1979 Phys. Rev. C 20 992
[14] Cameron G W 1957 Can. J. Phys. 35 1021
[1]
FU Yuan-Yong;ZHOU Shu-Hua;T. Koike;S. Kinoshita;Y. Ma;Y. Miura;K. Miwa;Y. Miyagi;K. Shirotori;T. Suzuki;H. Tamura;K. Tsukada;M. Ukai;K. Futatsukawa;K. Hosomi;M. Kawai;M. Mimori;N. Terada;N. Maruyama;K. Aoki;H. Fujioka;Y. Kakiguchi; T. Nagae;D. Nakajima;H. Noumi;T. Takahashi;T.N. Takahashi;A. Toyota;M. Dairaku;T. Fukuda;S. Minami;W. Imoto;S. Ajimura;K. Tanida. Measurement of Gamma-Rays from 11ΛB and 12ΛC[J]. 中国物理快报, 2007, 24(8): 2216-2218.
2011, Vol. 28 
