Kaon, pion, and proton associated photofission of Bi nuclei

• Published in: Physics of atomic nuclei 2010-10, Vol.73 (10), p.1707-1712
• Main Authors: Song, Y., Margaryan, A., Acha, A., Ahmidouch, A., Androic, D., Asaturyan, A., Asaturyan, R., Baker, O. K., Baturin, P., Benmokhtar, F., Carlini, R., Chen, X., Christy, M., Cole, L., Danagoulian, S., Daniel, A., Dharmawardane, V., Egiyan, K., Elaasar, M., Ent, R., Fenker, H., Fujii, Y., Furic, M., Gan, L., Gaskell, D., Gasparian, A., Gibson, E. F., Grigoryan, N., Gueye, P., Halkyard, R., Hashimoto, O., Honda, D., Horn, T., Hu, B., Hu, S., Hungerford, Ed. V., Ispiryan, M., Johnston, K., Jones, M., Kalantarians, N., Kaneta, M., Kato, F., Kato, S., Kawama, D., Keppel, C., Knyazyan, S., Li, Y., Luo, W., Mack, D., Marikyan, G., Maruyama, N., Matsumura, A., Miyoshi, T., Mkrtchyan, A., Mkrtchyan, H., Nakamura, S. N., Navasardyan, T., Niculescu, G., Niculescu, M. -I., Nomura, H., Nonaka, K., Ohtani, A., Okayasu, Y., Pamela, P., Parlakyan, L., Perez, N., Petkovic, T., Randeniya, S., Reinhold, J., Rivera, R., Roche, J., Rodriguez, V. M., Sato, Y., Seva, T., Simicevic, N., Smith, G., Sumihama, M., Tadevosyan, V., Takahashi, T., Tamura, H., Tang, L., Tvaskis, V., Vardanyan, H., Vulcan, W., Wang, B., Wells, S., Wood, S., Yan, C., Yuan, L.
• Format: Article
• Language: English
• Subjects: BARYONS; BISMUTH; BOSONS; ELEMENTARY PARTICLES; Elementary Particles and Fields; ELEMENTS; ENERGY RANGE; FERMIONS; FISSION; GEV RANGE; GEV RANGE 01-10; HADRONS; KAONS; MASSLESS PARTICLES; MESONS; METALS; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEAR REACTIONS; NUCLEONS; Particle and Nuclear Physics; PHOTOFISSION; PHOTONS; PHOTONUCLEAR REACTIONS; Physics; Physics and Astronomy; PIONS; PROBABILITY; PROTONS; PSEUDOSCALAR MESONS; STRANGE MESONS; STRANGE PARTICLES; Toy industry
• ISSN: 1063-7788; 1562-692X
• DOI: 10.1134/S1063778810100078

The first measurement of proton, pion, and kaon associated fission of Bi nuclei has been performed in a photon energy range 1. 45 < E γ < 1. 55 GeV. The fission probabilities are compared with an inclusive fission probabilities obtained with photons, protons and pions. The fission probability of Bi nuclei in coincidence with kaons is 0. 18 ± 0. 06 which is ∼3 times larger than the proton and pion associated fission probabilities and ∼2 times larger than inclusive ones. The kaon associated excess fission events are explained in terms of bound Λ residual states and their weak nonmesonic decays.