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Prog. Theor. Phys. Vol. 98 No. 4 (1997) pp. 917-926
The Giant Dipole Resonance in Ar-Isotopes in the Relativistic RPA
Zhongyu Ma,*,**,***
Hiroshi Toki,*
Baoqiu Chen**
and
Nguyen Van Giai****
*Research Center for Nuclear Physics, Osaka University, Ibaraki 567
** China Institute of Atomic Energy, P. O. Box, 275/18, Beijing 102413
*** Institute of Theoretical Physics, Academia Sinica, Beijing 100080
****Division de Physique Théorique, Institut de Physique Nucléaire
F-91406 Orsay Cedex
Abstract:
The isovector giant dipole resonance in Ar-isotopes
is studied in the framework of the relativistic
random phase approximation starting from effective Lagrangians
originally proposed for describing nuclear ground states.
The calculations are done with the parameter set TM1 which satisfactorily
describes the ground states of stable and unstable nuclei up to
the drip lines.
It is found that the isovector dipole strength
in nuclei near drip lines is split into two components:
one peaks at the normal giant dipole energy, the other is
located at low energy. The lower dipole state is due to the
weakly bound neutron (or proton) excitation, which
may cause large cross-sections in collisions with heavy nuclei by Coulomb
excitation.
URL :
http://ptp.ipap.jp/link?PTP/98/917/
DOI : 10.1143/PTP.98.917
References:
-
I. Tanihata et al., Phys. Rev. Lett. 55 (1985), 2676[APS].
-
P. G. Hansen and B. Jonson, Europhys. Lett. 4 (1987), 409[CrossRef].
- K. Ikeda, Nucl. Phys. A538 (1992), 355c.
-
Y. K. Gambhir, P. Ring and A. Thimet, Ann. of Phys. 198 (1990), 132[CrossRef].
-
D. Hirata, H. Toki, T. Watabe, I. Tanihata and B. V. Carlson, Phys. Rev. C44 (1991), 1467[APS].
- Y. Sugahara and H. Toki, Nucl. Phys. A579 (1994), 557.
- Z. Z. Ren, B. Q. Chen, Z. Y. Ma and W. Mittig, J. of Phys. G: Nucl. Part. Phys. 21 (1995), 1269.
-
K. Wehrberger and F. Beck, Phys. Rev. C37 (1988), 1148[APS].
-
M. L'Huillier and Nguyen Van Giai, Phys. Rev. C39 (1989), 2022[APS].
-
J. F. Dawson and R. J. Furnstahl, Phys. Rev. C42 (1990), 2009[APS].
-
D. S. Oakley, J. R. Shepard and N. Auerbach, Phys. Rev. C45 (1992), 2254[APS].
-
Z. Y. Ma, N. Van Giai, H. Toki and M. L'Huillier, Phys. Rev. C55 (1997), 2385[APS].
- Z. Y. Ma, N. Van Giai and H. Toki, to be published in Nucl. Phys. (1997).
-
R. Brockmann and R. Machleidt, Phys. Rev. C42 (1990), 1965[APS].
- M. M. Sharma, M. A. Nagarajan and P. Ring, Phys. Lett. B312 (1993), 377.
- A. L. Fetter and J. D. Walecka, Quantum Theory of Many-Particle Systems (McGraw-Hill, New York, 1971).
- B. D. Serot and J. D. Walecka, Adv. Nucl. Phys. 16 (1986), 1.
- B. L. Berman and S. C. Fultz, Revs. Mod. Phys. 47 (1975), 713.
- A. van der Woude, Electric and Magnetic Giant Resonances in Nuclei, ed. J. Speth (World Scientific Publishing Company, 1991), p. 99.
Citing Article(s) :
-
Progress of Theoretical Physics Vol. 100 No. 5 (1998) pp. 1013-1031
:
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Relativistic Equation of State of Nuclear Matter for Supernova Explosion
-
Hong Shen, Hiroshi Toki, Kazuhiro Oyamatsu and Kohsuke Sumiyoshi
