Abstract
Decay of soft multipole excitations in halo nuclei is studied in comparison with the potential resonance state. Although the soft excitation has a sharp peak just above the particle threshold and carries extremely large transition strength, the decay rate looks much faster than that expected for a resonance state. Consequently, the half life is shown to be several orders of magnitude shorter than what one naively expects from the uncertainty principle. It is shown also that the soft excitations accumulate large transition strength as a non-resonant single-particle excitation, but not as particle-hole collective excitations like giant resonances.
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Hansen, P.G., Jonson, B.: Europhys. Lett. 4, 409 (1987)
Bertsch, G.F., Esbensen, H.: Ann. of Phys. 209, 327 (1991)
The contributions of Ikeda, K., Esbensen, H., Lenske, H., Kamimura, M., Sakuragi, Y. to Proc. of Int. Symposium on Structure and Reactions of Unstable Nuclei, Eds. K. Ikeda, Y. Suzuki, World Scientific (1991)
Sagawa, H.: Nucl. Phys. A538, 619C (1992)
Fayans, S.A.: Phys. Lett. B267, 443 (1991)
Shimoura, T.: Proc. of Int. Symp. on Structure and Reactions of Unstable Nuclei Eds. K. Ikeda, Y. Suzuki, p. 132, World Scientific, 1991
Ieki, K., Sackett, D., Galonsky, A., Bertulani, C.A., Kruse, J.J., Lynch, W.G., Morrissey, D.J., Orr, N.A., Schulz, H., Sustich, A., Wigner, J.A., Deak, F., Horvath, A., Kiss, A., Seres, Z., Kolata, J.J., Wigner, A.E., Humphrey, D.L.: Phys. Rev. Lett. 70, 6 (1993)
Nakamura, T., et al.: Phys. Lett. B331, 296 (1994)
Sagawa, H., Takigawa, N., Van Giai, N.: Nucl. Phys. A543. 575 (1992)
Alhassid, Y., Gai, M., Bertsch, G.F.: Phys. Rev. Lett. 49, 1482 (1982)
Blatt, J.M., Weisskopf, V.F.: Theoretical Nuclear Physics, New York: John Wiley and Sons 1952
Takigawa, N., Sagawa, H.: Phys. Lett. B265, 23 (1991)
Takigawa, N., Sagawa, H., Shinozuka, T.: Nucl. Phys. A538, 221c (1992)
Morimatsu, O.: Ph.D. thesis (Univ. of Tokyo, 1986) and Private communication
Akaishi, Y.: Nucl. Phys. A527, 481c (1991)
Sagawa, H.: Perspectives in Heavy Ion Physics, Eds. M. Di Toro, E. Migneco, p. 73, Bologna, Italian Physical Society (1993)
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The authors are indebted to K. Ieki, O. Morimatsu, T. Shimoura and S. Yoshida for enlightening and stimulating discussions. This work is supported financially by the Grant-in-Aid for Scientific Research on Priority Areas (No. 06234212) by the Ministry of Education, Science and Culture.