Abstract
The mass of10Li has been measured with two different reactions:9Be(13C,12N)10Li,E Lab=336 MeV, and13C(14C,17F)10Li,E Lab=337 MeV. The mass excess of 33.445(50) MeV is deduced from theQ-value measurement.10Li is found to be particle-unstable with respect to one-neutron emission by 0.42(5) MeV. In the analysis of the first reaction a low lying excited state is found at 0.38(8) MeV. This state and the ground state can be most probably identified as the 1+/2+-doublet coupled from the [π 1p3/2 ⊗ν 1p 1/2] configuration, the 1+-state being the ground state. The (13C,12N)-reaction populates the 1+-state strongly due to a spin-isospin-flip character of the dominant part of the transition amplitude. The 2+-member corresponds to the mass given by Wilcox et al. A second excited state is observed at 4.05(10) MeV with a width of 0.7(2) MeV, it can be associated with theν 1d 5/2-strength. The second reaction is fully supporting the interpretation of the ground state doublet. The excited state at 4.05 MeV is not observed in this reaction and indeed it should not, because the reaction does not populate in first order excited neutron configurations. The levels are well described by mean field calculations including pairing correlations. The lowest resonance in the calculations is theν 1/2−-configuration, whereas theν 1/2+-configuration shows at the neutron threshold a strong non-resonant contribution.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Tanihata, I., Kobayashi, T., Yamakawa, O., Shimoura, S., Ekuni, K., Sugimoto, K., Takahashi, N., Shimoda, T.: Phys. Lett. B206, 592 (1988)
Kobayashi, T., Yamakawa, O., Omata, K., Sugimoto, K., Shimoda, T., Takahashi, N., Tanihata, I.: Phys. Rev. Lett.60, 2599 (1988)
Wilcox, K.H., Weisenmiller, R.B., Wosniak, G.J., Jelley, N.A., Ashery, D., Cerny, J.: Phys. Lett. B59, 142 (1975)
Barker, F.C., Hickey, G.T.: J.Phys. G3, L23 (1977)
Chen, Y.S., Harrison, W.D., Tombrello, T.A.: Bull. Am. Phys. Soc.15, 1598 (1970)
Abramovich, S.N., Guzhovskii, B.Ya., Zvenigorodskii, A.G., Trusillo, S.V.: Bull. Acad. Sci. USSR Phys. Ser.37, 144 (1973)
Amelin, A.I., Gornov, M.G., Gurov, Yu.B., Ilyin, A.L., Morokhov, P.V., Pechkurov, V.A., Savelyev, V.I., Sergeev, F.M., Smirnov, S.A., Chernyshev, B.A., Shafigullin, R.R., Shishkov, A.V.: Yad. Fiz.52, 1231 (1990)
Poppelier, N.A.F.M., Wood, L.D., Glaudemans, P.W.M.: Phys. Lett. B157, 120 (1985)
Thomas, R.G.: Phys. Rev.80, 1109 (1950); Ehrmann, J.B.: Phys. Rev.81, 412 (1951)
Horiuchi, H., Maruyama, T., Ohnishi, A., Yamaguchi, S.: Proc. Int. Symp. on Structure and Reactions of Unstable Nuclei, Niigata 1991. Ikeda, K., Suzuki, Y. (eds.), p. 108. Singapore: World Scientific 1991
Seth, K.K., Artuso, M., Barlow, D., Iversen, S., Kaletka, M., Nann, H., Parker, B., Soundranayagam, R.: Phys. Rev. Lett.58, 1930 (1987)
Bohlen, H.G., Gebauer, B., Kolbert, D., von Oertzen, W., Stiliaris, E., Wilpert, M., Wilpert, T.: Z. Phys. A330, 227 (1988)
Barker, F.C.: Nucl. Phys.83, 418 (1966)
Lane, A.M., Thomas, R.G.: Rev. Mod. Phys.30, 257 (1958)
Bohlen, H.G., Gebauer, B., Kolbert, D., Kubono, S., von Oertzen, W., Pellegrin, P.O., Stiliaris, E., Wilpert, M., Wilpert, T., Lenske, H., Wolter, H.H., Miczaika, A., Alamanos, N., Barrette, J., Berthier, B., Fernandez, B., Berat, C., Buenerd, M., Hostachy, J.Y., Martin, Ph., Mittig, W.: Nucl. Phys. A488, 89c (1988)
Lenske, H., Wolter, H.H., Bohlen, H.G.: Phys. Rev. Lett.62, 1457 (1989)
Ostrowski, A.N., Bohlen, H.G., Demyanova, A.S., Gebauer, B., Kalpakchieva, R., Langner, Ch., Lenske, H., von Lucke-Petsch, M., von Oertzen, W., Ogloblin, A.A., Penionzhkevich, Yu.E., Wilpert, M., Wilpert, Th.: Z. Phys. A343, 489 (1992))
Drentje, A.G., Enge, H.A., Kowalski, S.B.: Nucl. Instrum. Methods122, 485 (1974)
Bohlen, H.G.: In: Detectors in Heavy-Ion Reactions. Proceedings of the Symposium Commemorating the 100th anniversary of Hans Geiger's birth, held at the Hahn-Meitner-Institut für Kernforschung Berlin 1982. Lecture Notes in Physics, Oertzen, W. von (ed.), Vol. 178, p. 105. Berlin, Heidelberg, New York: Springer 1983
Ajzenberg, Selove, F., Flynn, E.R., Hansen, O.: Phys. Rev. C17, 1283 (1978)
Bohlen, H.G., Ossenbrink, H., Lettau, H., von Oertzen, W.: Z. Phys. A320, 237 (1985); Adamides, E., Bohlen, H.G., von Oertzen, W., Buenerd, M., Chauvin, J., Lebrun, D., Hostachy, J.Y., Martin, Ph., Perrin, G., de Saintignon, P.: Nucl. Phys. A475, 598 (1987)
Mayer-Kuckuk, Th.: Kernphysik, p. 203. Stuttgart: Teubner 1984
Maier, H.J., Kutschera, W.: Nucl. Instrum. Methods167, 91 (1979)
Weisenmiller, R.B., Jelley, N.A., Ashery, D., Wilcox, K.H., Wozniak, G.J., Zisman, M.S., Cerny, J.: Nucl. Phys. A280, 217 (1977)
Hansen, P.G., and Jonson, B., Europhys. Lett.4 (1988) 162;
Hoshino, T., Sagawa, H., and Arima, A., Nucl. Phys. A506, (1990) 271; Bang, J.M., Ferera, L.S., Maglione, E.: Europhys. Lett.18, 679 (1992)
Siudak, R., Lenske, H., Wolter, H.H., Kamys, B.: Nucl. Phys. A (to be published)
Dechargé, J., Gogny, D.: Phys. Rev. C21, 1568 (1980)
Bohr, A., Mottelson, B.: Nuclear structure. Vol. I. New York: Benjamin Press 1969