Abstract
The investigation of direct reactions with exotic beams in inverse kinematics gives access to a wide field of nuclear structure studies in the region far off stability. The basic concept and the methods involved are briefly discussed. The present contribution will focus on the investigation of light neutron-rich halo nuclei. Such nuclei reveal a new type of nuclear structure, namely an extended neutron distribution surrounding a nuclear core. An overview on this phenomenon, and on the various methods which gave first evidence and qualitative confirmation of our present picture of halo nuclei, is given.
To obtain more quantitative information on the radial shape of halo nuclei, elastic proton scattering on neutron-rich light nuclei at intermediate energies was recently investigated for the first time. This method is demonstrated to be an effective means for studying the nuclear matter distributions of such nuclei. The results on the nuclear matter radii of 6He and 8He, the deduced nuclear matter density distributions, and the significance of the data on the halo structure is discussed. The present data allow also a sensitive test of theoretical model calculations on the structure of neutron-rich helium isotopes. A few examples are presented.
The investigation of few-nucleon transfer reactions in inverse kinematics may provide new and complementary information on nuclear structure, as well as astrophysical questions. The physics motivation and the experimental concept for such experiments, to be performed due to momentum matching reasons at low incident energies around 5–20 MeV/u at the new generation low energy radioactive beam facilities SPIRAL, PIAFE, etc., is briefly discussed.
Similar content being viewed by others
References
I Tanihata et al, Phys. Rev. Lett. 55, 2676 (1985)
I Tanihata et al, Phys. Lett. B160, 380 (1985)
I Tanihata, Nucl. Phys. A488, 113c (1988)
K Riisager, Rev. Mod. Phys. 66, 1105 (1994)
P G Hansen et al, Ann. Rev. Nucl. Part. Sci. 45, 591 (1995)
I Tanihata, Prog. Part. Nucl. Phys. 35, 505 (1995)
I Tanihata, J. Phys. G22, 157 (1996)
E Arnold et al, Phys. Lett. B197, 311 (1987)
E Arnold et al, Phys. Lett. B281, 16 (1992)
H Emling, J. Phys. G24, 1561 (1998)
T Baumann et al, Phys. Lett. B439, 256 (1998)
G D Alkhazov et al, Phys. Rep. 42, 89 (1978)
A A Korsheninnikov et al, Nucl. Phys. A617, 45 (1997)
M D Cortina-Gil et al, Phys. Lett. B401, 9 (1997)
G D Alkhazov et al, Pisma ZhETF 55, 377 (1992); JETP Lett. 55, 379 (1992)
G D Alkhazov et al, Nucl. Phys. (1999) to be published
G D Alkhazov et al, Phys. Rev. Lett. 78, 2313 (1997)
S R Neumaier et al, Nucl. Phys. (1999) to be published
H Geissel et al, Nucl. Instr. Meth. B70, 286 (1992)
S R Neumaier et al, Proc. Int. Conf. on Exotic Nuclei and Atomic Masses, ENAM, Arles, France, Edit. Front. 227 (1995)
A A Vorobyov et al, Nucl. Instr. Meth. 119, 509 (1974)
O G Grebenjuk et al, Nucl. Phys. A500, 637 (1989)
I Tanihata et al, Phys. Lett. B206, 592 (1988)
L V Chulkov et al, Europhys. Lett. 8, 245 (1989)
I Tanihata et al, Phys. Lett. B289, 261 (1992)
J S Al-Khalili et al, Phys. Rev. C54, 1843 (1996)
J S Al-Khalili et al, Nucl. Phys. A616, 418c (1997)
H M Hofmann, Lecture Notes in Physics 273, 243 (1987)
J Wurzer et al, Phys. Rev. C55, 688 (1997) and references therein
J Wurzer, PhD thesis, University of Erlangen (1997)
M Tomaselli et al, (1999) to be published: GSI scientific report 1998
P Egelhof, Proc. of the Int. Workshop on Research with Fission Fragments, Benediktbeuren, 1996, World Scientific, ISBN 981-02-3140-7, p. 178 (1997)
G Kraus et al, Z. Phys. A340, 339 (1991)
A V Kienlin et al, Nucl. Instr. Meth. A368, 815 (1996)
H J Meier et al, Nucl. Phys. A626, 451c (1997)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Egelhof, P. Nuclear structure studies on halo nuclei by direct reactions with radioactive beams. Pramana - J Phys 53, 365–380 (1999). https://doi.org/10.1007/s12043-999-0002-2
Issue Date:
DOI: https://doi.org/10.1007/s12043-999-0002-2