Abstract
Yields of fragments originating from 232Th photofission were measured at bremsstrahlungphoton endpoint energies of 50 and 3500 MeV. Charge and mass distributions of fission fragments were analyzed. On the basis of the model of multimode fission, symmetric and asymmetric channels are singled out in 232Th photofission at intermediate energies. This decomposition made it possible to estimate the contributions of various fission components and the fissility of 232Th.
Similar content being viewed by others
References
M. Goeppet-Mayer, Phys. Rev. 74, 235 (1948).
P. Möller and S. G. Nilsson, Phys. Lett. B 31, 283 (1970).
P. Möller, S. G. Nilsson, and J. R. Nix, Nucl. Phys. A 229, 292 (1974).
V.M. Strutinsky, Nucl. Phys. A 122, 1 (1968).
T. Ledergerber and H. C. Pauli, Nucl. Phys. A 207, 1 (1973).
B. D. Wilkins, E. P. Steinberg, and R. R. Chasman, Phys. Rev. C 14, 1832 (1976).
W. D. Myers and W. J. Swiatecki, Nucl. Phys. 81, 1 (1966).
W. D. Myers and W. J. Swiatecki, Ark. Fys. 36, 343 (1967).
T. Ohtsuki, Y. Hamajima, K. Sueki, et al., Phys. Rev. C 40, 2144 (1989).
Chien Chung and J. J. Hogan, Phys. Rev. C 24, 180 (1981).
H. Kudo, H. Muramatsu, H. Nakahara, et al., Phys. Rev. C 25, 3011 (1982).
Chien Chung and James J. Hogan, Phys. Rev. C 25, 899 (1982).
V. C. Duijvestijn, A. J. Koning, J. P.M. Beijers, et al., Phys. Rev. C 59, 776 (1999).
V. A. Rubchenya, Phys. Rev. C 75, 054601 (2007).
I. A. Pshenichnov, B. L. Berman, W. J. Briscoe, et al., Eur. Phys. J. A 24, 69 (2005).
C. Cetina, B. L. Berman, W. J. Briscoe, et al., Phys. Rev. Lett. 84, 5740 (2000).
C. Cetina, P. Heimberg, B. L. Berman, et al., Phys. Rev. C 65, 044622 (2002).
J. Ahrens et al., Phys. Lett. B 146, 303 (1984).
N. Bianchi et al., Phys. Rev. C 48, 1785 (1993).
K.-H. Schmidt et al., Nucl. Phys. A 665, 221 (2000).
M. Bernas, P. Armbruster, J. Benlliure, et al., Nucl. Phys. A 725, 213 (2003).
A. Turkevich and J. R. Niday, Phys. Rev. 84, 52 (1951).
U. Brosa, S. Grossman, and A. Muller, Z. Naturforsch. A 41, 1341 (1986).
C. Wagemans and P. Schillebeeckx, and A. Deruytter, Nucl. Phys. A 502, 287 (1989).
A. Matthies, R. Kotte, W. Seidel, et al., Z. Phys. A 337, 439 (1990).
F.-J. Hambsch, S. Oberstedt, A. Tutora, et al., Nucl. Phys. A 726, 248 (2003).
V. M. Maslov, Nucl. Phys. A 717, 3 (2003).
C. M. Zoller, A. Gavron, J. P. Lestone, et al., in Proc. of the Seminar on Fission “Pont d’Oye III,” Belgium, 9–15 May 1995, IKDA 95/25 (Darmstadt, 1995).
W. Younes, J. A. Becker, L. A. Bernstein, et al., in Proc. of the Intern. Nuclear Conf. (INPC 2001), Berkeley, 2001, AIP Proc. Conf. 610, 673 (2002).
K. Masumoto, T. Kato, and N. Suzuki, Nucl. Instrum. Methods Phys. Res. 157, 567 (1978).
N. A. Demekhina and A. S. Danagulyan, Yad. Fiz. 24, 681 (1976) [Sov. J. Nucl. Phys. 24, 355 (1976)].
R. B. Firestone, in Tables of Isotopes, 8th ed. (Wiley Intersci., New York, 1996); 1998 Update with CD ROM,Ed. by S. Y. FrankChu (CD-ROMeditor) and C. M. Baglin.
H. Baba, J. Sanada, H. Araki, and A. Yokoyama, Nucl. Instrum. Methods Phys. Res. A 416, 301 (1998).
H. Kudo, M. Maruyama, M. Tanikawa, et al., Phys. Rev. C 57, 178 (1998).
P. David, J. Debrus, U. Kim, et al., Nucl. Phys. A 197, 163 (1972).
M. F. James, R. W. Mills, and D. R. Weaver, Prog. Nucl. Energy 26, 1 (1991).
B. Schroder, G. Nydahl, and B. Forkman, Nucl. Phys. A 143, 449 (1970).
G. A. Varapetyan, N. A. Demekhina, V. I. Kasilov, et al., Yad. Fiz. 14, 65 (1971) [Sov. J. Nucl. Phys. 14, 37 (1971)].
D. M. Hiller and D. S. Martin, Jr., Phys. Rev. 90, 581 (1953).
I.F. Croall and J. G. Cuninghame,Nucl.Phys. A 125, 402 (1969).
S. A. Karamian, J. Adam, A. G. Belov, et al., Phys. Rev. C 62, 024601 (2000).
A. Deppman, J. D. T. Arruda-Nero, E. De Sanctus, and N. Bianchi, Nuovo Cimento A 109, 1197 (1996).
A. Veyssière, H. Beil, R. Bergère, et al., Nucl. Phys. A 199, 45 (1973).
S. G. Mashnik, M. I. Baznat, K. K. Gudima, et al., nucl-th/0503061.
A. Deppman, O. A. P. Tavares, S. B. Duarte, et al., Phys. Rev. C 66, 067601 (2002).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © N.A. Demekhina, G.S. Karapetyan, 2010, published in Yadernaya Fizika, 2010, Vol. 73, No. 1, pp. 26–35.
Rights and permissions
About this article
Cite this article
Demekhina, N.A., Karapetyan, G.S. Symmetric and asymmetric modes of 232Th photofission at intermediate energies. Phys. Atom. Nuclei 73, 24–33 (2010). https://doi.org/10.1134/S1063778810010047
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063778810010047