Photoneutron cross sections for unstable neutron-rich oxygen isotopes

被引：227

作者：

Leistenschneider, A ^{[1
]}

Aumann, T

Boretzky, K

Cortina, D

Cub, J

Pramanik, UD

Dostal, W

Elze, TW

Emling, H

Geissel, H

Grünschloss, A

Hellstr, M

Holzmann, R

Ilievski, S

Iwasa, N

Kaspar, M

Kleinböhl, A

Kratz, JV

Kulessa, R

Leifels, Y

Lubkiewicz, E

Münzenberg, G

Reiter, P

Rejmund, M

Scheidenberger, C

Schlegel, C

Simon, H

Stroth, J

Sümmerer, K

Wajda, E

Walús, W

Wan, S

机构：

[1] Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany

[2] Gesell Schwerionenforsch GmbH, GSI Darmstadt, D-64291 Darmstadt, Germany

[3] Univ Mainz, Inst Kernchem, D-55099 Mainz, Germany

[4] Tech Univ, Inst Kernphys, D-64289 Darmstadt, Germany

[5] Uniwersytet Jagellonski, Inst Fiz, PL-30059 Krakow, Poland

[6] Univ Munich, Sekt Phys, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.86.5442

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dipole response of stable and unstable neutron-rich oxygen nuclei of masses A = 17 to A = 22 has been investigated experimentally utilizing electromagnetic excitation in heavy-inn collisions at beam energies about 600 MeV/nucleon. A kinematically complete measurement of the neutron decay channel in inelastic scattering of the secondary beam projectiles from a Pb target was performed. Differential electromagnetic excitation cross sections d sigma /dE were derived up to 30 MeV excitation energy. In contrast to stable nuclei, the deduced dipole strength distribution appears to be strongly fragmented and systematically exhibits a considerable fraction of low-lying strength.

引用

页码：5442 / 5445

页数：4

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