Abstract
Protons andα-particles emitted in coincidence with a deep inelastic fragment produced in the reaction40Ar (280 MeV)+58Ni have been measured. From a detailed study of their in-plane angular distribution, it is shown that the bulk of the light charged particle emission can be attributed to a secondary evaporation process by the two primary deep inelastic fragments. A lowest estimate of the fragment spin (assuming total alignment perpendicular to the reaction plane) is obtained from the anisotropy of the out-of-plane angular distribution of theα-particles. For very asymmetric splitting, the heavy fragment spin estimate as obtained from theα-anisotropy measurement is consistent with the observed proton toα-particle multiplicity ratio. The results are in agreement with the hypothesis of a sticking configuration between two deformed nuclei.
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Moretto, L., Schmitt, R.P.: J. de Phys. (Paris)37, C5 109 (1976)
Galin, J.: Ref. 1, page 83
Schroeder, W.V., Huizenga, S.: Ann. Rev. Nucl. Sci.27, 465 (1977)
Lefort, M., Ngô, C.: Ann. Physique (Paris)3, 5 (1978)
Scott, D.K.: Int. Report Berkeley, LBL 77 27 (1978)
Schmitt, R.P., Bizard, G., Wozniak, J.G., Moretto, L.G.: Phys. Rev. Lett.41, 1152 (1978)
Babinet, R., Cauvin, B., Girard, J., Nifenecker, H., Gatty, B., Guerreau, D., Lefort, M., Tarrago, X.: Nucl. Phys. A296, 160 (1978)
Plasil, F., Ferguson, R.L., Britt, H.C., Goldstone, P.D., Blann, M., Gutbrod, H.H.: Phys. Rev. Lett.40, 1184 (1978)
Cauvin, B., Jared, R.G., Russo, P., Schmitt, R.P., Babinet, R., Moretto, L.G.: Nucl. Phys. A301, 511 (1978)
Gelbke, C.K., Braun-Munzinger, P., Barette, J., Zeidmann, B., Levine, M.J., Gamp, A., Harney, H.L., Walcher, T.: Nucl. Phys. A269, 460 (1976)
Tamain, B., Chechik, R., Fuchs, H., Hanappe, F., Morjean, M., Ngô, C., Péter, J., Dakowski, M., Lucas, B., Mazur, C., Ribrag, M., Signarbieux, C.: Nucl. Phys. A330, 253 (1979)
Ho, H., Albrecht, R., Dünweber, W., Graw, G., Steadman, S.G., Wurm, J.P., Disdier, D., Rauch, V., Scheibling, F.: Z. Physik A283, 235 (1977)
Harris, J.W., Cormier, T.M., Gusamon, D.F., Lee, L.L., Mc Grath, R.M., Wurm, J.P.: Phys. Rev. Lett.38, 1460 (1977)
Miller, J.M., Catchen, G.L., Logan, D., Rajagopolan, M., Alexander, J.M., Kaplan, M., Zisman, M.S.: Phys. Rev. Lett.40, 100 (1978)
Logan, D., Rajogopalan, M., Zisman, M.S., Alexander, J.M., Kaplan, M., Kowalski, L.: Phys. Rev. C (in press)
Gamp, A., Jacmart, J.C., Poffé, N., Doubre, A., Roynette, J.C., Wilczynski, J.: Phys. Lett.74B, 215 (1978)
Bethe, H.: Phys. Rev.53, 675 (1938)
Weiner, R., Westrom, M.: Nucl. Phys. A286, 282 (1977)
Gottschalk, P.A., Westrom, M.: Nucl. Phys. A314, 232 (1979)
Wozniak, L.G., Schmitt, R.P., Glässel, P., Jared, R.C., Bizard, G., Moretto, L.G.: Phys. Rev. Lett.40, 1436 (1978)
Dyer, P., Puigh, J.J., Vandenbosch, R., Thomas, T.D., Zisman, M.S.: Phys. Rev. Lett.39, 392 (1978)
Rajagopalan, M., Kowalski, L., Logan, D., Kaplan, M., Alexander, J.M., Zisman, M.S., Miller, J.M.: Phys. Rev. C19, 54 (1979)
Specht, H.J.: Int. Conf. on Nucl. Interactions, Canberra (Australia) (1978)
Gerschel, C., Deleplanque, M.A., Ishihara, M., Ngô, C., Perrin, N., Péter, J., Tamain, B., Valentin, L., Paya, D., Sugiyama, Y., Berlanger, M., Hanappe, F.: Nucl. Phys. A317, 473 (1979)
Olmi, A., Sann, H., Pelte, D., Eyal, Y., Gobbi, A., Kohl, W., Lynen, U., Rudolf, G., Stelzer, H., Bock, R.: Phys. Rev. Lett.41, 688 (1978)
Albrecht, R., Dünweber, W., Graw, G., Ho, H., Steddman, S.G., Wurm, J.P.: Phys. Rev. Lett.34, 1400 (1975)
Ribber, K.V., Ledoux, R., Steadman, S.G., Videback, F., Young, G., Flaum, C.: Phys. Rev. Lett.38, 334 (1977)
Glassel, P., Simon, R.S., Diamond, R.M., Jared, R.C., Lee, I.Y., Moretto, L.G., Newton, J.O., Schmitt, R., Stephens, F.S.: Phys. Rev. Lett.38, 331 (1977)
Aleonard, M.M., Wozniak, G.J., Glassel, P., Deleplanque, M.A., Diamond, R.M., Moretto, L.G., Schmitt, P.P., Stephens, F.J.: Phys. Rev. Lett.40, 622 (1978)
Ishihara, M., Janaka, K., Kommuri, T., Matsuska, K., Sano, M.: Phys. Lett.73B, 281 (1978)
Trautmann, W., de Boer, J., Dünweber, W., Graw, G., Kopp, R., Lauterbach, C., Pucht, H., Lynen, U.: Phys. Rev. Lett.39, 1062 (1977)
Lauterbach, C., Dünweber, W., Graw, G., Hering, W., Puchta, H., Trautman, W.: Phys. Rev. Lett.41, 1774 (1978)
Thomas, T.D.: Nucl. Phys.53, 558, 577 (1964); Ann. Rev. Nucl. Sci.18, 343 (1968)
Grover, J.R., Gilat, J.: Phys. Rev.157, 802, 814, 823 (1967)
Galin, J., Gatty, B., Guerreau, D., Rousset, C., Schlotthouer-Voss, V.C., Tarrago, X.: Phys. Rev. C9, 1113, 1126 (1974); C10, 638 (1974)
Catchen, G.L., Kaplan, M., Alexander, J.M., Rivet, M.F.: Phys. Rev. C (in press)
Fleury, A., Alexander, J.M.: Ann. Rev. Nucl. Science24, 27 (1974)
Galin, J., Guerreau, D., Babinet, R.: J. of Phys. Soc. of Japan44, 683 (1978)
Gatty, B., Guerreau, D., Lefort, M., Tarrago, X., Galin, J., Gauvin, B., Girard, J., Nifenecker, H.: Nucl. Phys. A253, 511 (1975)
Galin, J., Gatty, B., Guerreau, D., Lefort, M., Tarrago, X., Babinet, R., Cauvin, B., Girard, J., Nifenecker, H.: Z. Physik A278, 347 (1976)
Albrecht, A., Back, B.B., Bock, R., Fischer, B., Gobbi, A., Hildebrand, K., Kohl, W., Lynen, U., Rode, I., Stelzer, H., Auger, G., Galin, J., Lagrange, J.M.: European Conference on Nuclear Physics with Heavy Ions, Caen (1976), com. p. 167
Gauvin, H., Guerreau, D., Le Beyec, Y., Lefort, M., Plasil, F., Tarrago, X.: Phys. Lett.58 B, 163 (1975)
Benveniste, J., Merkel, G., Mitchell, A.: Phys. Rev.174, 1357 (1968)
Brun, C., Gatty, B., Lefort, M., Tarrago, X.: Nucl. Phys. A116, 177 (1968)
Gatty, B.: Thèse d'Etat. Orsay (1968), unpublished
Britt, H.C., Quinton, A.R.: Phys. Rev.124, 877 (1961)
Rousset, C.: Thèse 3° cycle. Orsay (1972), unpublished
Reedy, R.C., Fluss, M.J., Herzog, G.F., Kowalski, L., Miller, J.M.: Phys. Rev.188, 1771 (1969)
Ho, H., et al.: Reported at the Symposium on deep inelastic and fusion reactions with heavy ions, Hahn-Meitner-Institut für Kernforschung, Berlin, Oct. 23–25 (1979), to be published
Delagrange, H., Logan, D., Rivet, M.F., Rajagopalan, M., Alexander, J.M., Zisman, M.S., Kaplan, M., Ball, J.W.: Phys. Rev. Lett.43, 1490 (1979)
Inamura, T., Ishihara, M., Fukuda, T., Shimoda, T., Hirata, H.: Phys. Lett.68 B, 51 (1977)
Nomura, T., Utsunomiya, H., Motobayashi, T., Inamura, T., Yanokura, M.: Phys. Rev. Lett.40, 694 (1978)
Zolnowski, J.R., Yamada, H., Gala, S.E., Kahler, A.C., Sugihara, T.T.: Phys. Rev. Lett.41, 92 (1978)
Yamada, H., Zolnowski, D.R., Cala, S.E., Kahler, A.C., Pierce, J., Sugihara, T.T.: Phys. Rev. Lett.43, 605 (1979)
Siwek-Wilczynska, K., Du Marchie Van Voorthuysen, E.H., Van Popta, J., Siemssen, R.H., Wilczynski, J.: Phys. Rev. Lett.42, 1599 (1979)
Geoffroy, K.A., Sarantites, D.G., Halbert, M.L., Hensley, D.C., Dayras, R.A., Barker, J.H.: Phys. Rev. Lett.43, 1303 (1979)
Awes, T.C., Gelbke, C.K., Back, B.B., Mignerey, A.C., Wolf, K.L., Dyer, P., Breuer, H., Viola, Jr., V.E.: Phys. Lett.87 B, 43 (1979)
Ericson, T., Strutinski, V.: Nucl. Phys.8, 284 (1958)
Ericson, T.: Adv. of Physics9, 425 (1960)
Dossing, T.: preprint 1978
McMahan, M.A., Alexander, J.M.: Phys. Rev. C (in press)
Wolschin, G.: Nucl. Phys. A316, 146 (1979)
Agarwal, S., Galin, J., Gatty, B., Guerreau, D., Lefort, M., Tarrago, X., Babinet, R., Cauvin, B., Girard, J., Nifenecker, H.: Nucl. Phys. A293, 230 (1977)
Namboodiri, M.N., Natowitz, J.B., Kasiraj, P., Eggers, R., Adler, L., Gonthier, P., Cerruti, C., Simon, S.: Phys. Rev. C20, 982 (1979)
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We would like to thank P. Bisénius, E. Nolte, J. Pouthas and P. Volkov for the very helpful technical assistance before and during the experiment. JMA is very grateful for hospitality at Orsay and for financial support as associated professor.
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Babinet, R., Cauvin, B., Girard, J. et al. Light particle emission in deeply inelastic collisions of 280 MeV40Ar+58Ni: Thermal equilibrium and angular momentum transfer. Z Physik A 295, 153–167 (1980). https://doi.org/10.1007/BF01413073
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DOI: https://doi.org/10.1007/BF01413073